Copenhagen, Denmark – January 15, 2026 – Heimdal today announced that its Next-Gen Antivirus (NGAV) with Extended Threat Protection (XTP) has achieved OPSWAT Gold Certification for Anti-Malware, validating its compatibility and effectiveness within OPSWAT’s industry-leading Access Control Certification Program. What the OPSWAT Certification Validates The certification confirms that Heimdal meets OPSWAT’s strict requirements for anti-malware […]

The post Heimdal Achieves OPSWAT Gold Certification for Anti-Malware appeared first on Heimdal Security Blog.

Recently, fake LinkedIn profiles have started posting comment replies claiming that a user has “engaged in activities that are not in compliance” with LinkedIn’s policies and that their account has been “temporarily restricted” until they submit an appeal through a specified link in the comment.

The comments come in different shapes and sizes, but here’s one example we found.

The accounts posting the comments all try to look like official LinkedIn bots and use various names. It’s likely they create new accounts when LinkedIn removes them. Either way, multiple accounts similar to the “Linked Very” one above were reported in a short period, suggesting automated creation and posting at scale.

The same pattern is true for the links. The shortened link used in the example above has already been disabled, while others point directly to phishing sites. Scammers often use shortened LinkedIn links to build trust, making targets believe the messages are legitimate. Because LinkedIn can quickly disable these links, attackers likely test different approaches to see which last the longest.

Here’s another example:

Malwarebytes blocks this last link based on the IP address:

If users follow these links, they are taken to a phishing page designed to steal their LinkedIn login details:

A LinkedIn spokesperson confirmed to BleepingComputer they are aware of the situation:

“I can confirm that we are aware of this activity and our teams are working to take action.”

Stay safe

In situations like this awareness is key—and now you know what to watch for. Some additional tips:

• Don’t click on unsolicited links in private messages and comments without verifying with the trusted sender that they’re legitimate.
• Always log in directly on the platform that you are trying to access, rather than through a link.
• Use a password manager, which won’t auto-fill in credentials on fake websites.
• Use a real-time, up-to-date anti-malware solution with a web protection module to block malicious sites.

Pro tip: The free Malwarebytes Browser Guard extension blocks known malicious websites and scripts.

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We don’t just report on scams—we help detect them

Cybersecurity risks should never spread beyond a headline. If something looks dodgy to you, check if it’s a scam using Malwarebytes Scam Guard, a feature of our mobile protection products. Submit a screenshot, paste suspicious content, or share a text or phone number, and we’ll tell you if it’s a scam or legit. Download Malwarebytes Mobile Security for iOS or Android and try it today!

Researchers have been tracking a Magecart campaign that targets several major payment providers, including American Express, Diners Club, Discover, and Mastercard.

Magecart is an umbrella term for criminal groups that specialize in stealing payment data from online checkout pages using malicious JavaScript, a technique known as web skimming.

In the early days, Magecart started as a loose coalition of threat actors targeting Magento‑based web stores. Today, the name is used more broadly to describe web-skimming operations against many e‑commerce platforms. In these attacks, criminals inject JavaScript into legitimate checkout pages to capture card data and personal details as shoppers enter them.

The campaign described by the researchers has been active since early 2022. They found a vast network of domains related to a long-running credit card skimming operation with a wide reach.

“This campaign utilizes scripts targeting at least six major payment network providers: American Express, Diners Club, Discover (a subsidiary of Capital One), JCB Co., Ltd., Mastercard, and UnionPay. Enterprise organizations that are clients of these payment providers are the most likely to be impacted.”

Attackers typically plant web skimmers on e-commerce sites by exploiting vulnerabilities in supply chains, third-party scripts, or the sites themselves. This is why web shop owners need to stay vigilant by keeping systems up to date and monitoring their content management system (CMS).

Web skimmers usually hook into the checkout flow using JavaScript. They are designed to read form fields containing card numbers, expiry dates, card verification codes (CVC), and billing or shipping details, then send that data to the attackers.

To avoid detection, the JavaScript is heavily obfuscated to and may even trigger a self‑destruct routine to remove the skimmer from the page. This can cause investigations performed through an admin session to appear unsuspicious.

Besides other methods to stay hidden, the campaign uses bulletproof hosting for a stable environment. Bulletproof hosting refers to web hosting services designed to shield cybercriminals by deliberately ignoring abuse complaints, takedown requests, and law enforcement actions.

How to stay safe

Magecart campaigns affect three groups: customers, merchants, and payment providers. Because web skimmers operate inside the browser, they can bypass many traditional server‑side fraud controls.

While shoppers cannot fix compromised checkout pages themselves, they can reduce their exposure and improve their chances of spotting fraud early.

A few things you can protect against the risk of web skimmers:

• Use virtual or single‑use cards for online purchases so any skimmed card number has a limited lifetime and spending scope.
• Where possible, turn on transaction alerts (SMS, email, or app push) for card activity and review statements regularly to spot unsolicited charges quickly.
• Use strong, unique passwords on bank and card portals so attackers cannot easily pivot from stolen card data to full account takeover.
• Use a web protection solution to avoid connecting to malicious domains.

Pro tip: Malwarebytes Browser Guard is free and blocks known malicious sites and scripts.

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We don’t just report on threats—we remove them

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

It starts with a simple search.

You need to set up remote access to a colleague’s computer. You do a Google search for “RustDesk download,” click one of the top results, and land on a polished website with documentation, downloads, and familiar branding.

You install the software, launch it, and everything works exactly as expected.

What you don’t see is the second program that installs alongside it—one that quietly gives attackers persistent access to your computer.

That’s exactly what we observed in a campaign using the fake domain rustdesk[.]work.

The bait: a near-perfect impersonation

We identified a malicious website at rustdesk[.]work impersonating the legitimate RustDesk project, which is hosted at rustdesk.com. The fake site closely mirrors the real one, complete with multilingual content and prominent warnings claiming (ironically) that rustdesk[.]work is the only official domain.

This campaign doesn’t exploit software vulnerabilities or rely on advanced hacking techniques. It succeeds entirely through deception. When a website looks legitimate and the software behaves normally, most users never suspect anything is wrong.

What happens when you run the installer

The installer performs a deliberate bait-and-switch:

1. It installs real RustDesk, fully functional and unmodified
2. It quietly installs a hidden backdoor, a malware framework known as Winos4.0

The user sees RustDesk launch normally. Everything appears to work. Meanwhile, the backdoor quietly establishes a connection to the attacker’s server.

By bundling malware with working software, attackers remove the most obvious red flag: broken or missing functionality. From the user’s point of view, nothing feels wrong.

Inside the infection chain

The malware executes through a staged process, with each step designed to evade detection and establish persistence:

Stage 1: The trojanized installer

The downloaded file (rustdesk-1.4.4-x86_64.exe) acts as both dropper and decoy. It writes two files to disk:

• The legitimate RustDesk installer, which is executed to maintain cover
• logger.exe, the Winos4.0 payload

The malware hides in plain sight. While the user watches RustDesk install normally, the malicious payload is quietly staged in the background.

Stage 2: Loader execution

The logger.exe file is a loader — its job is to set up the environment for the main implant. During execution, it:

• Creates a new process
• Allocates executable memory
• Transitions execution to a new runtime identity: Libserver.exe

This loader-to-implant handoff is a common technique in sophisticated malware to separate the initial dropper from the persistent backdoor.

By changing its process name, the malware makes forensic analysis harder. Defenders looking for “logger.exe” won’t find a running process with that name.

Stage 3: In-memory module deployment

The Libserver.exe process unpacks the actual Winos4.0 framework entirely in memory. Several WinosStager DLL modules—and a large ~128 MB payload—are loaded without being written to disk as standalone files.

Traditional antivirus tools focus on scanning files on disk (file-based detection). By keeping its functional components in memory only, the malware significantly reduces the effectiveness of file-based detection. This is why behavioral analysis and memory scanning are critical for detecting threats like Winos4.0.

The hidden payload: Winos4.0

The secondary payload is identified as Winos4.0 (WinosStager): a sophisticated remote access framework that has been observed in multiple campaigns, particularly targeting users in Asia.

Once active, it allows attackers to:

• Monitor victim activity and capture screenshots
• Log keystrokes and steal credentials
• Download and execute additional malware
• Maintain persistent access even after system reboots

This isn’t simple malware—it’s a full-featured attack framework. Once installed, attackers have a foothold they can use to conduct espionage, steal data, or deploy ransomware at a time of their choosing.

Technical detail: How the malware hides

The malware employs several techniques to avoid detection:

What it does	How it achieves this	Why it matters
Runs entirely in memory	Loads executable code without writing files	Evades file-based detection
Detects analysis environments	Checks available system memory and looks for debugging tools	Prevents security researchers from analyzing its behavior
Checks system language	Queries locale settings via the Windows registry	May be used to target (or avoid) specific geographic regions
Clears browser history	Invokes system APIs to delete browsing data	Removes evidence of how the victim found the malicious site
Hides configuration in the registry	Stores encrypted data in unusual registry paths	Hides configuration from casual inspection

Command-and-control activity

Shortly after installation, the malware connects to an attacker-controlled server:

• IP: 207.56.13[.]76
• Port: 5666/TCP

This connection allows attackers to send commands to the infected machine and receive stolen data in return. Network analysis confirmed sustained two-way communication consistent with an established command-and-control session.

How the malware blends into normal traffic

The malware is particularly clever in how it disguises its network activity:

Destination	Purpose
207.56.13[.]76:5666	Malicious: Command-and-control server
209.250.254.15:21115-21116	Legitimate: RustDesk relay traffic
api.rustdesk.com:443	Legitimate: RustDesk API

Because the victim installed real RustDesk, the malware’s network traffic is mixed with legitimate remote desktop traffic. This makes it much harder for network security tools to identify the malicious connections: the infected computer looks like it’s just running RustDesk.

What this campaign reveals

This attack demonstrates a troubling trend: legitimate software used as camouflage for malware.

The attackers didn’t need to find a zero-day vulnerability or craft a sophisticated exploit. They simply:

1. Registered a convincing domain name
2. Cloned a legitimate website
3. Bundled real software with their malware
4. Let the victim do the rest

This approach works because it exploits human trust rather than technical weaknesses. When software behaves exactly as expected, users have no reason to suspect compromise.

Indicators of compromise

File hashes (SHA256)

File	SHA256	Classification
Trojanized installer	330016ab17f2b03c7bc0e10482f7cb70d44a46f03ea327cd6dfe50f772e6af30	Malicious
logger.exe / Libserver.exe	5d308205e3817adcfdda849ec669fa75970ba8ffc7ca643bf44aa55c2085cb86	Winos4.0 loader
RustDesk binary	c612fd5a91b2d83dd9761f1979543ce05f6fa1941de3e00e40f6c7cdb3d4a6a0	Legitimate

Network indicators

Malicious domain: rustdesk[.]work

C2 server: 207.56.13[.]76:5666/TCP

In-memory payloads

During execution, the malware unpacks several additional components directly into memory:

SHA256	Size	Type
a71bb5cf751d7df158567d7d44356a9c66b684f2f9c788ed32dadcdefd9c917a	107 KB	WinosStager DLL
900161e74c4dbab37328ca380edb651dc3e120cfca6168d38f5f53adffd469f6	351 KB	WinosStager DLL
770261423c9b0e913cb08e5f903b360c6c8fd6d70afdf911066bc8da67174e43	362 KB	WinosStager DLL
1354bd633b0f73229f8f8e33d67bab909fc919072c8b6d46eee74dc2d637fd31	104 KB	WinosStager DLL
412b10c7bb86adaacc46fe567aede149d7c835ebd3bcab2ed4a160901db622c7	~128 MB	In-memory payload
00781822b3d3798bcbec378dfbd22dc304b6099484839fe9a193ab2ed8852292	307 KB	In-memory payload

How to protect yourself

The rustdesk[.]work campaign shows how attackers can gain access without exploits, warnings, or broken software. By hiding behind trusted open-source tools, this attack achieved persistence and cover while giving victims no reason to suspect compromise.

The takeaway is simple: software behaving normally does not mean it’s safe. Modern threats are designed to blend in, making layered defenses and behavioral detection essential.

For individuals:

• Always verify download sources. Before downloading software, check that the domain matches the official project. For RustDesk, the legitimate site is rustdesk.com—not rustdesk.work or similar variants.
• Be suspicious of search results. Attackers use SEO poisoning to push malicious sites to the top of search results. When possible, navigate directly to official websites rather than clicking search links.
• Use security software. Malwarebytes Premium Security detects malware families like Winos4.0, even when bundled with legitimate software.

For businesses:

• Monitor for unusual network connections. Outbound traffic on port 5666/TCP, or connections to unfamiliar IP addresses from systems running remote desktop software, should be investigated.
• Implement application allowlisting. Restrict which applications can run in your environment to prevent unauthorized software execution.
• Educate users about typosquatting. Training programs should include examples of fake websites and how to verify legitimate download sources.
• Block known malicious infrastructure. Add the IOCs listed above to your security tools.

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We don’t just report on threats—we remove them

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

California’s privacy regulator has fined a Texas data broker $45,000 and banned it from selling Californians’ personal information after it sold Alzheimer patients’ data. Texan company Rickenbacher Data LLC, which does business as Datamasters, bought and resold the names, addresses, phone numbers, and email addresses of people that suffered from serious health conditions, according to the California Privacy Protection Agency (CPPA).

The CPPA’s final order against Datamasters says that the company maintained a database containing 435,245 postal addresses for Alzheimer’s patients. But it didn’t stop there. Also up for grabs were records for 2,317,141 blind or visually impaired people, and 133,142 addiction sufferers. It also sold records for 857,449 people with bladder control issues.

Health-related data wasn’t the only category Datamasters trafficked in. The company also sold information tied to ethnicity, including so-called “Hispanic lists” containing more than 20 million names, as well as age-based “senior lists” and indicators of financial vulnerability. For example, it sold records of people holding high-interest mortgages.

And if buyers wanted data on other likely customer characteristics and actions, such as who was likely a liberal vs a right-winger, it could give you that, too, thanks to 3,370 “Consumer Predictor Models” spanning automotive preferences, financial activity, media use, political affiliation, and nonprofit activity.

Datamasters offers outright purchase of records from its national consumer database, which it claims covers 114 million households and 231 million individuals. Customers can also buy subscription-based updates too.

California regulators began investigating Datamasters after discovering the company had failed to register as a data broker in the state, as required under California’s Delete Act. The law has required data brokers to register since January 31, 2025.

The company originally denied that it did business in California or had data on Californians. However, that claim collapsed when regulators found an Excel spreadsheet on the website listing 204,218 California student records.

Datamasters first said it had not screened its national database to remove Californians’ data. After getting a lawyer, it changed its story, asserting that it did in fact filter Californians out of the data set. That didn’t convince the CPPA though.

The regulator acknowledged that Datamasters did try to comply with Californian privacy laws, but that it

“lacked sufficient written policies and procedures to ensure compliance with the Delete Act.”

The fine imposed on Datamasters also takes into account that it hadn’t registered on the state’s data broker registry. Data brokers that don’t register are liable for $200 per day in fines, and failing to delete consumer data will incur $200 per consumer per day in fines.

Starting January 1, 2028, data brokers registered in California will also be required to undergo independent third-party compliance audits every three years.

Why selling extra-sensitive customer data is so dangerous

“History teaches us that certain types of lists can be dangerous,”

Michael Macko, the CPPA’s head of enforcement, pointed out.

Research has told us that Alzheimer’s patients are especially vulnerable to financial exploitation. If you think that scammers don’t seek out such lists, think again; criminals were found to have accessed data from at least three data brokers in the past. While there’s no suggestion that Datamasters knowingly sold data to scammers, it seems easy for people to buy data broker lists.

It also doesn’t take a PhD to see why many of these records (which, remember, the company holds about people nationwide) could be especially sensitive in the current US political climate.

There’s a broader privacy issue here, too. While many Americans might assume that the federal Health Insurance Portability and Accountability Act (HIPAA) protects their health data, it only applies to healthcare providers. Amazingly, data brokers sit outside its purview.

So what can you do to protect yourself?

Your first port of call should be your state’s data protection law. California introduced the Data Request and Opt-out Platform (DROP) system this year under the Delete Act. It’s an opt-out system for California residents to make all data brokers on the registry delete data held about them.

If you don’t live in a state that takes sensitive data seriously, your options are more limited. You could move—maybe to Europe, where privacy protections are considerably stronger.

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We don’t just report on data privacy—we help you remove your personal information

Cybersecurity risks should never spread beyond a headline. With Malwarebytes Personal Data Remover, you can scan to find out which sites are exposing your personal information, and then delete that sensitive data from the internet.

If you were still questioning whether iOS 26+ is for you, now is the time to make that call.

Why?

On December 12, 2025, Apple patched two WebKit zero‑day vulnerabilities linked to mercenary spyware and is now effectively pushing iPhone 11 and newer users toward iOS 26+, because that’s where the fixes and new memory protections live. These vulnerabilities were primarily used in highly targeted attacks, but such campaigns are likely to expand over time.

WebKit powers the Safari browser and many other iOS applications, so it’s a big attack surface to leave exposed and isn’t limited to “risky” behavior. These vulnerabilities allowed an attacker to execute arbitrary code on a device after exploitation via malicious web content.

Apple has confirmed that attackers are already exploiting these vulnerabilities in the wild, making installation of the update a high‑priority security task for every user. Campaigns that start with diplomats, journalists, or executives often lead to tooling and exploits leaking or being repurposed, so “I’m not a target” is not a viable safety strategy.​

Due to public resistance to new features like Liquid Glass, many iPhone users have not yet upgraded to iOS 26.2. Reports suggest adoption of iOS 26 has been unusually slow. As of January 2026, only about 4.6% of active iPhones are on iOS 26.2, and roughly 16% are on any version of iOS 26, leaving the vast majority on older releases such as iOS 18.

However, Apple only ships these fixes and newer protections, such as Memory Integrity Enforcement, on iOS 26+ for supported devices. Users on older, unsupported devices won’t be able to access these protections at all.

Another important factor in the upgrade cycle is restarting the device. What many people don’t realize is that when you restart your device, any memory-resident malware is flushed—unless it has somehow gained persistence, in which case it will return. High-end spyware tools tend to avoid leaving traces needed for persistence and often rely on users not restarting their devices.

Upgrading requires a restart, which makes this a win-win: you get the latest protections, and any memory-resident malware is flushed at the same time.

For iOS and iPadOS users, you can check if you’re using the latest software version, go to Settings > General > Software Update. It’s also worth turning on Automatic Updates if you haven’t already. You can do that on the same screen.

How to stay safe

The most important fix—however painful you may find it—is to upgrade to iOS 26.2. Not doing means missing an accumulating list of security fixes, leaving your device vulnerable to more and more newly found vulnerabilities.

 But here are some other useful tips:

• Make it a habit to restart your device on a regular basis. The NSA recommends doing this weekly.
• Do not open unsolicited links and attachments without verifying with the trusted sender.
• Remember, Apple threat notifications will never ask users to click links, open files, install apps or ask for account passwords or verification code.
• For Apple Mail users specifically, these vulnerabilities create risk when viewing HTML-formatted emails containing malicious web content.
• Malwarebytes for iOS can help keep your device secure, with Trusted Advisor alerting you when important updates are available.
• If you are a high-value target, or you want the extra level of security, consider using Apple’s Lockdown Mode.

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We don’t just report on phone security—we provide it

Cybersecurity risks should never spread beyond a headline. Keep threats off your mobile devices by downloading Malwarebytes for iOS, and Malwarebytes for Android today.

Grok’s failure to block sexualized images of minors has turned a single “isolated lapse” into a global regulatory stress test for xAI’s ambitions. The response from lawmakers and regulators suggests this will not be solved with a quick apology and a hotfix.

Last week we reported on Grok’s apology after it generated an image of young girls in “sexualized attire.”

The apology followed the introduction of Grok’s paid “Spicy Mode” in August 2025, which was marketed as edgy and less censored. In practice it enabled users to generate sexual deepfake images, including content that may cross into illegal child sexual abuse material (CSAM) under US and other jurisdictions’ laws.

A report from web-monitoring tool CopyLeaks highlighted “thousands” of incidents of Grok being used to create sexually suggestive images of non-consenting celebrities.

This is starting to backfire. Reportedly, three US senators are asking Google and Apple to remove Elon Musk’s Grok and X apps from their app stores, citing the spread of nonconsensual sexualized AI images of women and minors and arguing it violates the companies’ app store rules.

In their joint letter, the senators state:

“In recent days, X users have used the app’s Grok AI tool to generate nonconsensual sexual imagery of real, private citizens at scale. This trend has included Grok modifying images to depict women being sexually abused, humiliated, hurt, and even killed. In some cases, Grok has reportedly created sexualized images of children—the most heinous type of content imaginable.”

The UK government also threatens to take possible action against the platform. Government officials have said they would fully support any action taken by Ofcom, the independent media regulator, against X. Even if that meant UK regulators could block the platform.

Indonesia and Malaysia already blocked Grok after its “digital undressing” function flooded the internet with suggestive and obscene manipulated images of women and minors.

As it turns out, a user prompted Grok to generate its own “apology,” which it did. After backlash over sexualized images of women and minors, Grok/X announced limits on image generation and editing for paying subscribers only, effectively paywalling those capabilities on main X surfaces.

For lawmakers already worried about disinformation, election interference, deepfakes, and abuse imagery, Grok is fast becoming the textbook case for why “move fast and break things” doesn’t mix with AI that can sexualize real people on demand.

Hopefully, the next wave of rules, ranging from EU AI enforcement to platform-specific safety obligations, will treat this incident as the baseline risk that all large-scale visual models must withstand, not as an outlier.

Keep your children safe

If you ever wondered why parents post images of their children with a smiley across their face, this is the reason.

Don’t make it easy for strangers to copy, reuse, or manipulate your photos.

This incident is yet another compelling reason to reduce your digital footprint. Think carefully before posting photos of yourself, your children, or other sensitive information on public social media accounts.

And treat everything you see online—images, voices, text—as potentially AI-generated unless they can be independently verified. They’re not only used to sway opinions, but also to solicit money, extract personal information, or create abusive material.

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We don’t just report on threats – we help protect your social media

Cybersecurity risks should never spread beyond a headline. Protect your social media accounts by using Malwarebytes Identity Theft Protection.

Last week on Malwarebytes Labs:

• pcTattletale founder pleads guilty as US cracks down on stalkerware
• Are we ready for ChatGPT Health?
• CISA warns of active attacks on HPE OneView and legacy PowerPoint
• Lego’s Smart Bricks explained: what they do, and what they don’t
• Fake WinRAR downloads hide malware behind a real installer
• One million customers on alert as extortion group claims massive Brightspeed data haul
• Phishing campaign abuses Google Cloud services to steal Microsoft 365 logins
• Disney fined $10m for mislabeling kids’ YouTube videos and violating privacy law
• ALPRs are recording your daily drive (Lock and Code S06E26)
• Grok apologizes for creating image of young girls in “sexualized attire”

Stay safe!

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We don’t just report on privacy—we offer you the option to use it.

Privacy risks should never spread beyond a headline. Keep your online privacy yours by using Malwarebytes Privacy VPN.

Reportedly, pcTattletale founder Bryan Fleming has pleaded guilty in US federal court to computer hacking, unlawfully selling and advertising spyware, and conspiracy.

This is good news not just because we despise stalkerware like pcTattletale, but because it is only the second US federal stalkerware prosecution in a decade. It could could open the door to further cases against people who develop, sell, or promote similar tools.

In 2021, we reported that “employee and child-monitoring” software vendor pcTattletale had not been very careful about securing the screenshots it secretly captured from victims’ phones. A security researcher testing a trial version discovered that the app uploaded screenshots to an unsecured online database, meaning anyone could view them without authentication, such as a username and password.

In 2024, we revisited the app after researchers found it was once again leaking a database containing victim screenshots. One researcher discovered that pcTattletale’s Application Programming Interface (API) allowed anyone to access the most recent screen capture recorded from any device on which the spyware is installed. Another researcher uncovered a separate vulnerability that granted full access to the app’s backend infrastructure. That access allowed them to deface the website and steal AWS credentials, which turned out to be shared across all devices. As a result, the researcher obtained data about both victims and the customers who were doing the tracking.

This is no longer possible. Not because the developers fixed the problems, but because Amazon locked pcTattletale’s entire AWS infrastructure. Fleming later abandoned the product and deleted the contents of its servers.

However, Homeland Security Investigations had already started investigating pcTattletale in June 2021 and did not stop. A few things made Fleming stand out among other stalkerware operators. While many hide behind overseas shell companies, Fleming appeared to be proud of his work. And while others market their products as parental control or employee monitoring tools, pcTattletale explicitly promoted spying on romantic partners and spouses, using phrases such as “catch a cheater” and “surreptitiously spying on spouses and partners.” This made it clear the software was designed for non-consensual surveillance of adults.

Fleming is expected to be sentenced later this year.

Removing stalkerware

Malwarebytes, as one of the founding members of the Coalition Against Stalkerware, makes it a priority to detect and remove stalkerware-type apps from your device.

It is important to keep in mind, however, that removing stalkerware may alert the person spying on you that the app has been discovered. The Coalition Against Stalkerware outlines additional steps and considerations to help you decide the safest next move.

Because the apps often install under different names and hide themselves from users, they can be difficult to find and remove. That is where Malwarebytes can help you.

To scan your device:

1. Open your Malwarebytes dashboard
2. Start a Scan

The scan may take a few minutes.

 If malware is detected, you can choose one of the following actions:

• Uninstall. The threat will be deleted from your device.
• Ignore Always. The file detection will be added to the Allow List, and excluded from future scans. Legitimate files are sometimes detected as malware. We recommend reviewing scan results and adding files to Ignore Always that you know are safe and want to keep.
• Ignore Once: The detection is ignored for this scan only. It will be detected again during your next scan.

Malwarebytes detects pcTattleTale as PUP.Optional.PCTattletale.

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We don’t just report on threats—we remove them

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

The US Cybersecurity and Infrastructure Security Agency (CISA) added both a newly discovered flaw and a much older one to its catalog of Known Exploited Vulnerabilities (KEV).

The KEV catalog gives Federal Civilian Executive Branch (FCEB) agencies a list of vulnerabilities that are known to be exploited in the wild, along with deadlines for when they must be patched. In both of these cases, the due date is January 28, 2026.

But CISA alerts are not just for government agencies. They also provide guidance to businesses and end users about which vulnerabilities should be patched first, based on real-world exploitation.

A critical flaw in HPE OneView

The recently found vulnerability, tracked as CVE-2025-37164, carries a CVSS score of 10 out of 10 and allows remote code execution. The flaw affects HPE OneView, a platform used to manage IT infrastructure, and a patch was released on December 17, 2025.

This critical vulnerability allows a remote, unauthenticated attacker to execute code and potentially gain large-scale control over servers, firmware, and lifecycle management. Management platforms like HPE OneView are often deployed deep inside enterprise networks, where they have extensive privileges and limited monitoring because they are trusted.

Proof of Concept (PoC) code, in the form of a Metasploit module, was made public just one day after the patch was released.

A PowerPoint vulnerability from 2009 resurfaces

The cybersecurity dinosaur here is a vulnerability in Microsoft PowerPoint, tracked as CVE-2009-0556, that dates back more than 15 years. It affects:

• Microsoft Office PowerPoint 2000 SP3
• PowerPoint 2002 SP3
• PowerPoint 2003 SP3
• PowerPoint in Microsoft Office 2004 for Mac

The flaw allows remote attackers to execute arbitrary code by tricking a victim into opening a specially crafted PowerPoint file that triggers memory corruption.

In the past, this vulnerability was exploited by malware known as Apptom. CISA rarely adds vulnerabilities to the KEV catalog based on ancient exploits, so the “sudden” re‑emergence of the 2009 PowerPoint vulnerability suggests attackers are targeting still‑deployed legacy Office installs.

Successful exploitation can allow attackers to run arbitrary code, deploy malware, and establish a foothold for lateral movement inside a network. Unlike the HPE OneView flaw, this attack requires user interaction—the target must open the malicious PowerPoint file.

Stay safe

When it comes to managing vulnerabilities, prioritizing which patches to apply is an important part of staying safe. So, to make sure you don’t fall victim to exploitation of known vulnerabilities:

• Keep an eye on the CISA KEV catalog as a guide of what’s currently under active exploitation.
• Update as fast as you can without interrupting daily routine.
• Use a real-time up-to-date anti-malware solution to intercept exploits and malware attacks.
• Don’t open unsolicited attachments without verifying with the—trusted—sender.

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We don’t just report on threats—we remove them

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

US fiber broadband company Brightspeed is investigating claims by the Crimson Collective extortion group that it stole sensitive data belonging to more than 1 million residential customers, including extensive personally identifiable information (PII), as well as account and billing details.

Brightspeed is one of the largest fiber broadband providers in the US and serves customers across 20 states.

On January 4, the Crimson Collective posted this message on its Telegram channel:

“If anyone has someone working at BrightSpeed, tell them to read their mails fast!

We have in our hands over 1m+ residential user PII’s, which contains the following:

• Customer/account master records containing full PII such as names, emails, phone numbers, billing and service addresses, account status, network type, consent flags, billing system, service instance, network assignment, and site IDs.
• Address qualification responses with address IDs, full postal addresses, latitude and longitude coordinates, qualification status (fiber/copper/4G), maximum bandwidth, drop length, wire center, marketing profile codes, and eligibility flags.
• User-level account details keyed by session/user IDs, overlapping with PII including names, emails, phones, service addresses, account numbers, status, communication preferences, and suspend reasons.
• Payment history per account, featuring payment IDs, dates, amounts, invoice numbers, card types and masked card numbers (last 4 digits), gateways, and status; some entries indicate null or empty histories.
• Payment methods per account, including default payment method IDs, gateways, masked credit card numbers, expiry dates, BINs, holder names and addresses, status flags (Active/Declined), and created/updated timestamps.
• Appointment/order records per billing account, with customer PII such as names, emails, phones, addresses, order numbers, status, appointment windows, dispatch and technician information, and install types.

Sample will be dropped on monday night time, letting them some time first to answer to us. (UTC+9, Japan is quite fun for new years while dumping company data)”

The promised sample was later made available and contains 50 entries from each of the following database tables:

• [get-account-details]
  
• [getAddressQualification]
• [getUserAccountDetails]
• [listPaymentHistory]
• [listPaymentMethods]
  
• [user-appointments]

In a separate Telegram message, the group also claimed it had disconnected a large number of Brightspeed customers. However, this allegation appears only in the group’s own messaging and has not been corroborated by any public reporting.

While there are some customer complaints circulating on social media, it remains unclear whether these issues are actually caused by any actions taken by the Crimson Collective.

Brightspeed told BleepingComputer:

“We take the security of our networks and protection of our customers’ and employees’ information seriously and are rigorous in securing our networks and monitoring threats. We are currently investigating reports of a cybersecurity event. As we learn more, we will keep our customers, employees and authorities informed.”

Protecting yourself after a data breach

If you think you have been affected by a data breach, here are steps you can take to protect yourself:

• Check the company’s advice. Every breach is different, so check with the company to find out what’s happened and follow any specific advice it offers.
• Change your password. You can make a stolen password useless to thieves by changing it. Choose a strong password that you don’t use for anything else. Better yet, let a password manager choose one for you.
• Enable two-factor authentication (2FA). If you can, use a FIDO2-compliant hardware key, laptop, or phone as your second factor. Some forms of 2FA can be phished just as easily as a password, but 2FA that relies on a FIDO2 device can’t be phished.
• Watch out for impersonators. The thieves may contact you posing as the breached platform. Check the official website to see if it’s contacting victims and verify the identity of anyone who contacts you using a different communication channel.
• Take your time. Phishing attacks often impersonate people or brands you know, and use themes that require urgent attention, such as missed deliveries, account suspensions, and security alerts.
• Consider not storing your card details. It’s definitely more convenient to let sites remember your card details, but we highly recommend not storing that information on websites.
• Set up identity monitoring, which alerts you if your personal information is found being traded illegally online and helps you recover after.

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We don’t just report on threats—we help safeguard your entire digital identity

Cybersecurity risks should never spread beyond a headline. Protect your, and your family’s, personal information by using identity protection.

Attackers are sending very convincing fake “Google” emails that slip past spam filters, route victims through several trusted Google-owned services, and ultimately lead to a look-alike Microsoft 365 sign-in page designed to harvest usernames and passwords.

Researchers found that cybercriminals used Google Cloud Application Integration’s Send Email feature to send phishing emails from a legitimate Google address: noreply-application-integration@google[.]com.

Google Cloud Application Integration allows users to automate business processes by connecting any application with point-and-click configurations. New customers currently receive free credits, which lowers the barrier to entry and may attract some cybercriminals.

The initial email arrives from what looks like a real Google address and references something routine and familiar, such as a voicemail notification, a task to complete, or permissions to access a document. The email includes a link that points to a genuine Google Cloud Storage URL, so the web address appears to belong to Google and doesn’t look like an obvious fake.

After the first click, you are redirected to another Google‑related domain (googleusercontent[.]com) showing a CAPTCHA or image check. Once you pass the “I’m not a robot check,” you land on what looks like a normal Microsoft 365 sign‑in page, but on close inspection, the web address is not an official Microsoft domain.

Any credentials provided on this site will be captured by the attackers.

The use of Google infrastructure provides the phishers with a higher level of trust from both email filters and the receiving users. This is not a vulnerability, just an abuse of cloud-based services that Google provides.

Google’s response

Google said it has taken action against the activity:

“We have blocked several phishing campaigns involving the misuse of an email notification feature within Google Cloud Application Integration. Importantly, this activity stemmed from the abuse of a workflow automation tool, not a compromise of Google’s infrastructure. While we have implemented protections to defend users against this specific attack, we encourage continued caution as malicious actors frequently attempt to spoof trusted brands. We are taking additional steps to prevent further misuse.”

We’ve seen several phishing campaigns that abuse trusted workflows from companies like Google, PayPal, DocuSign, and other cloud-based service providers to lend credibility to phishing emails and redirect targets to their credential-harvesting websites.

How to stay safe

Campaigns like these show that some responsibility for spotting phishing emails still rests with the recipient. Besides staying informed, here are some other tips you can follow to stay safe.

• Always check the actual web address of any login page; if it’s not a genuine Microsoft domain, do not enter credentials.​ Using a password manager will help because they will not auto-fill your details on fake websites.
• Be cautious of “urgent” emails about voicemails, document shares, or permissions, even if they appear to come from Google or Microsoft.​ Creating urgency is a common tactic by scammers and phishers.
• Go directly to the service whenever possible. Instead of clicking links in emails, open OneDrive, Teams, or Outlook using your normal bookmark or app.
• Use multi‑factor authentication (MFA) so that stolen passwords alone are not enough, and regularly review which apps have access to your account and remove anything you don’t recognize.

Pro tip: Malwarebytes Scam Guard can recognize emails like this as scams. You can upload suspicious text, emails, attachments and other files and ask for its opinion. It’s really very good at recognizing scams.

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We don’t just report on scams—we help detect them

Cybersecurity risks should never spread beyond a headline. If something looks dodgy to you, check if it’s a scam using Malwarebytes Scam Guard, a feature of our mobile protection products. Submit a screenshot, paste suspicious content, or share a text or phone number, and we’ll tell you if it’s a scam or legit. Download Malwarebytes Mobile Security for iOS or Android and try it today!

Another AI system designed to be powerful and engaging ends up illustrating how guardrails routinely fail when development speed and feature races outrun safety controls.

In a post on X, AI chatbot Grok confirmed that it generated an image of young girls in “sexualized attire.”

The potential violation of US laws regarding child sexual abuse material (CSAM) demonstrates the AI chatbot’s apparent lack of guardrails. Or, at least, the guardrails are far from as effective as we’d like them to be.

xAI, the company behind Musk’s chatbot, is reviewing the incident “to prevent future issues,” and the user responsible for the prompt reportedly had their account suspended. Reportedly, in a separate post on X, Grok described the incident as an isolated case and said that urgent fixes were being issued after “lapses in safeguards” were identified.

During the holiday period, we discussed how risks increased when AI developments and features are rushed out the door without adequate safety testing. We keep pushing the limits of what AI can do faster than we can make it safe. Visual models that can sexualize minors are precisely the kind of deployment that should never go live without rigorous abuse testing.

So, while on one hand we see geo-blocking due to national and state content restrictions, the AI linked to one of the most popular social media platforms failed to block content that many would consider far more serious than what lawmakers are currently trying to regulate. In effect, centralized age‑verification databases become breach targets while still failing to prevent AI tools from generating abusive material.

Women have also reported being targeted by Grok’s image-generation features. One X user tweeted:

“Literally woke up to so many comments asking Grok to put me in a thong / bikini and the results having so many bookmarks. Even worse I went onto the Grok page and saw slimy disgusting lowlifes doing that to pictures of CHILDREN. Genuinely disgusting.”

We can only imagine the devastating results when cybercriminals would abuse this type of weakness to defraud or extort parents with fabricated explicit content of their young ones. Tools for inserting real faces into AI-generated content are already widely available, and current safeguards appear unable to reliably prevent abuse.

Tips

This incident is yet another compelling reason to reduce your digital footprint. Think carefully before posting photos of yourself, your children, or other sensitive information on public social media accounts.

Treat everything you see online—images, voices, text—as potentially AI-generated unless they can be independently verified. They’re not only used to sway opinions, but also to solicit money, extract personal information, or create abusive material.

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We don’t just report on threats – we help protect your social media

Cybersecurity risks should never spread beyond a headline. Protect your social media accounts by using Malwarebytes Identity Theft Protection.

Last week on Malwarebytes Labs:

• How AI made scams more convincing in 2025
• In 2025, age checks started locking people out of the internet
• 2025 exposed the risks we ignored while rushing AI
• Malware in 2025 spread far beyond Windows PCs

Stay safe!

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We don’t just report on privacy—we offer you the option to use it.

Privacy risks should never spread beyond a headline. Keep your online privacy yours by using Malwarebytes Privacy VPN.

This blog is part of a series where we highlight new or fast-evolving threats in consumer security. This one focuses on how AI is being used to design more realistic campaigns, accelerate social engineering, and how AI agents can be used to target individuals.

Most cybercriminals stick with what works. But once a new method proves effective, it spreads quickly—and new trends and types of campaigns follow.

In 2025, the rapid development of Artificial Intelligence (AI) and its use in cybercrime went hand in hand. In general, AI allows criminals to improve the scale, speed, and personalization of social engineering through realistic text, voice, and video. Victims face not only financial loss, but erosion of trust in digital communication and institutions.

Social engineering

Voice cloning

One of the main areas where AI improved was in the area of voice-cloning, which was immediately picked up by scammers. In the past, they would mostly stick to impersonating friends and relatives. In 2025, they went as far as impersonating senior US officials. The targets were predominantly current or former US federal or state government officials and their contacts.

In the course of these campaigns, cybercriminals used test messages as well as AI-generated voice messages. At the same time, they did not abandon the distressed-family angle. A woman in Florida was tricked into handing over thousands of dollars to a scammer after her daughter’s voice was AI-cloned and used in a scam.

AI agents

Agentic AI is the term used for individualized AI agents designed to carry out tasks autonomously. One such task could be to search for publicly available or stolen information about an individual and use that information to compose a very convincing phishing lure.

These agents could also be used to extort victims by matching stolen data with publicly known email addresses or social media accounts, composing messages and sustaining conversations with people who believe a human attacker has direct access to their Social Security number, physical address, credit card details, and more.

Another use we see frequently is AI-assisted vulnerability discovery. These tools are in use by both attackers and defenders. For example, Google uses a project called Big Sleep, which has found several vulnerabilities in the Chrome browser.

Social media

As mentioned in the section on AI agents, combining data posted on social media with data stolen during breaches is a common tactic. Such freely provided data is also a rich harvesting ground for romance scams, sextortion, and holiday scams.

Social media platforms are also widely used to peddle fake products, AI generated disinformation, dangerous goods,  and drop-shipped goods.

Prompt injection

And then there are the vulnerabilities in public AI platforms such as ChatGPT, Perplexity, Claude, and many others. Researchers and criminals alike are still exploring ways to bypass the safeguards intended to limit misuse.

Prompt injection is the general term for when someone inserts carefully crafted input, in the form of an ordinary conversation or data, to nudge or force an AI into doing something it wasn’t meant to do.

Malware campaigns

In some cases, attackers have used AI platforms to write and spread malware. Researchers have documented campaign where attackers leveraged Claude AI to automate the entire attack lifecycle, from initial system compromise through to ransom note generation, targeting sectors such as government, healthcare, and emergency services.

Since early 2024, OpenAI says it has disrupted more than 20 campaigns around the world that attempted to abuse its AI platform for criminal operations and deceptive campaigns.

Looking ahead

AI is amplifying the capabilities of both defenders and attackers. Security teams can use it to automate detection, spot patterns faster, and scale protection. Cybercriminals, meanwhile, are using it to sharpen social engineering, discover vulnerabilities more quickly, and build end-to-end campaigns with minimal effort.

Looking toward 2026, the biggest shift may not be technical but psychological. As AI-generated content becomes harder to distinguish from the real thing, verifying voices, messages, and identities will matter more than ever.

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We don’t just report on threats—we remove them

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

If 2024 was the year lawmakers talked about online age verification, 2025 was the year they actually flipped the switch.​

In 2025, across parts of Europe and the US, age checks for certain websites (especially pornography) turned long‑running child‑protection debates into real‑world access controls. Overnight, users found entire categories of sites locked behind ID checks, platforms geo‑blocking whole countries, and VPN traffic surging as people tried to get around the new walls.​

From France’s hardline stance on adult sites to the UK’s Online Safety Act, to a patchwork of new rules across multiple US states, these “show me your ID before you browse” systems are reshaping the web. The stated goal is to “protect the children,” but in practice the outcome is frequently a blunt national block, followed by users voting with their VPN buttons.​

The core tension: safety vs privacy

The fundamental challenge for websites and services is not checking age in principle, but how to do it without turning everyday browsing into an identity check. Almost every viable method asks users to hand over sensitive data, raising the stakes if (or more likely when) that data leaks in a breach.​

For ordinary users, the result is a confusing mess of blocks, prompts, and workarounds. On paper, countries want better protection for minors. In practice, adults discover that entire platforms are unavailable unless they are prepared to disclose personal information or disguise where they connect from. No website wants to be the one blamed after an age‑verification database is compromised, yet regulators continue to push for stronger identity links.​

How age checks actually work

Regulators such as Ofcom publish lists of acceptable age‑verification methods, each with its own privacy and usability trade‑offs. None are perfect, and many shift risk from governments and platforms onto users’ most sensitive personal data.​

• Facial age estimation: Users upload a selfie or short video so an algorithm can guess whether they look over 18, which avoids storing documents but relies on sensitive biometrics and imperfect accuracy.​
• Open banking: An age‑check service queries your bank for a simple “adult or not” answer. It may be convenient on paper but it’s a hard sell when the relying site is an adult platform.​
• Digital identity services: Digital ID wallets can assert “over 18” without exposing full credentials, but they add yet another app and infrastructure layer that must be trusted and widely adopted.​
• Credit card checks: Using a valid payment card as a proxy for adulthood is simple and familiar, but it excludes adults without cards and does not cover lower age thresholds like “over 13.”​
• Email‑based estimation: Systems infer age from where an email address has been used (such as banks or utilities), effectively encouraging cross‑service profiling and “digital snooping.”​
• Mobile network checks: Providers indicate whether an account has age‑related restrictions. This can be fast, but is unreliable for pay‑as‑you‑go accounts, burner SIMs, or poorly maintained records.​
• Photo‑ID matching: Users upload an ID document plus a selfie so systems can match faces and ages. This is effective, but concentrates highly sensitive identity data in yet another attractive target for attackers.​

My personal preference would be double‑blind verification: a third‑party provider verifies your age, then issues a simple token like “18+” to sites without revealing your identity or learning which site you visit, offering stronger privacy than most current approaches.​

In almost every case, users must surrender personal information or documents to prove their age, increasing the risk that identity data ends up in the wrong hands. This turns age gates into long‑lived security liabilities rather than temporary access checks.​

Geoblocking, VPNs, and cross‑border frictions

Right now, most platforms comply by detecting user location via IP address and then either demanding age checks or denying access entirely to users in specific regions. France’s enforcement actions, for example, led several major adult sites to geo-block the entire country in 2025, while the UK’s Online Safety Act coincided with a sharp rise in VPN use rather than widespread cross-border blocking.

European regulators generally focus on domestic ISPs, Digital Services Act reporting, and large platform fines rather than on filtering traffic from other countries, partly because broad traffic blocking raises net‑neutrality and technical complexity concerns. In the US, some state proposals have explicitly targeted VPN circumventions, signalling a willingness to attack the workarounds rather than the underlying incentives.​

Meanwhile, network‑level filtering vendors advertise “cross‑border” controls and VPN detection for governments, hinting at future scenarios where unregulated inbound flows or anonymity tools are aggressively throttled. If enforcement pressure grows, these capabilities could evolve from niche offerings into standard state infrastructure.​

A future of less anonymity?

A common argument is that eroding online anonymity will also curb toxic behavior and abuse on social media, since people act differently when their real‑world identity is at stake. But tying everyday browsing to identity checks risks chilling legitimate speech and exploration long before it delivers any proven civility benefits.​

A world where every connection requires ID is unlikely to arrive overnight. Still, the direction of travel is clear: more countries are normalizing age gates that double as identity checks, and more users are learning to route around them. Unless privacy‑preserving systems like robust double‑blind verification become the norm, age‑verification policies intended to protect children may end up undermining both privacy and open access to information.​

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We don’t just report on privacy—we offer you the option to use it.

Privacy risks should never spread beyond a headline. Keep your online privacy yours by using Malwarebytes Privacy VPN.

This blog is part of a series where we highlight new or fast-evolving threats in the consumer security landscape. This one looks at how the rapid rise of Artificial Intelligence (AI) is putting users at risk.

In 2025 we saw an ever-accelerating race between AI providers to push out new features. We also saw manufacturers bolt AI onto products simply because it sounded exciting. In many cases, it really shouldn’t have.

Agentic browsers

Agentic or AI browsers that can act autonomously to execute tasks introduced a new set of vulnerabilities—especially to prompt injection attacks. With great AI power comes great responsibility, and risk. If you’re thinking about using an AI browser, it’s worth slowing down and considering the security and privacy implications first. Even experienced AI providers like OpenAI (the makers of ChatGPT) were unable to keep their agentic browser Atlas secure. By pasting a specially crafted link into the Omnibox, attackers were able to trick Atlas into treating a URL input as a trusted command.

Mimicry

The popularity of AI chatbots created the perfect opportunity for scammers to distribute malicious apps. Even if the AI engine itself worked perfectly, attackers have another way in: fake interfaces. According to BleepingComputer, scammers are already creating spoofed AI sidebars that look identical to real ones from browsers like OpenAI’s Atlas and Perplexity’s Comet. These fake sidebars mimic the real interface, making them almost impossible to spot.

Misconfiguration

And then there’s this special category of using AI in products because it sounds cooler with AI or you can ask for more money from buyers.

Toys

We saw a plush teddy bear promising “warmth, fun, and a little extra curiosity” that was taken off the market after researcher found its built-in AI responding with sexual content and advice about weapons. Conversations escalated from innocent to sexual within minutes. The bear didn’t just respond to explicit prompts, which would have been more or less understandable. Researchers said it introduced graphic sexual concepts on its own, including BDSM-related topics, explained “knots for beginners,” and referenced roleplay scenarios involving children and adults.

Misinterpretation

Sometimes we rely on AI systems too much and forget that they hallucinate. As in the case where a school’s AI system mistook a boy’s empty Doritos bag for a gun and triggered a full-blown police response. Multiple police cars arrived with officers drawing their weapons, all because of a false alarm.

Data breaches

Alongside all this comes a surge in privacy concerns. Some issues stem from the data used to train AI models; others come from mishandled chat logs. Two AI companion apps recently exposed private conversations because users weren’t clearly warned that certain settings would result in their conversations becoming searchable or result in targeted advertising.

So, what should we do?

We’ve said it before and we’ll probably say it again:  We keep pushing the limits of what AI can do faster than we can make it safe. As long as we keep chasing the newest features, companies will keep releasing new integrations, whether they’re safe or not.

As consumers, the best thing we can do is stay informed about new developments and the risks that come with them. Ask yourself: Do I really need this? What am I trusting AI with? What’s the potential downside? Sometimes it’s worth doing things the slower, safer way.

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We don’t just report on privacy—we offer you the option to use it.

Privacy risks should never spread beyond a headline. Keep your online privacy yours by using Malwarebytes Privacy VPN.

This blog is part of a series highlighting new and concerning trends we noticed over the last year. Trends matter because they almost always provide a good indication of what’s coming next.

If there’s one thing that became very clear in 2025, it’s that malware is no longer focused on Windows alone. We’ve seen some major developments, especially in campaigns targeting Android and macOS. Unfortunately, many people still don’t realize that protecting smartphones, tablets, and other connected devices is just as essential as securing their laptops.

Android

Banking Trojans on Android are not new, but their level of sophistication continues to rise. These threats continue to be a major problem in 2025, often disguising themselves as fake apps to steal credentials or stealthily take over devices. A recent wave of advanced banking Trojans, such as Herodotus, can mimic human typing behaviors to evade detection, highlighting just how refined these attacks have become. Android malware also includes adware that aggressively pushes intrusive ads through free apps, degrading both the user experience and overall security.

Several Trojans were found to use overlays, which are fake login screens appearing on top of real banking and cryptocurrency apps. They can read what’s on the screen, so when someone enters their username and password, the malware steals them.

macOS

One of the most notable developments for Mac users was the expansion of the notorious ClickFix campaign to macOS. Early in 2025, I described how criminals used fake CAPTCHA sites and a clipboard hijacker to provide instructions that led visitors ro infect their own machines with the Lumma infostealer.

ClickFix is the name researchers have since given to this type of campaign, where users are tricked into running malicious commands themselves. On macOS, this technique is being used to distribute both AMOS stealers and the Rhadamanthys infostealer.

Cross-platform

Malware developers increasingly use cross-platform languages such as Rust and Go to create malware that can run on Windows, macOS, Linux, mobile, and even Internet of Things (IoT) devices. This enables flexible targeting and expands the number of potential victims. Malware-as-a-Service (MaaS) models are on the rise, offering these tools for rent or purchase on underground markets, further professionalizing malware development and distribution.

Social engineering

iPhone users have been found to be more prone to scams and less conscious about mobile security than Android owners. That brings us to the first line of defense, which has nothing to do with the device or operating system you use: education.

Social engineering exploits human behavior, and knowing what to look out for makes you far less likely to fall for a scam.

Fake apps that turn out to be malware, malicious apps in the Play Store, sextortion, and costly romance scams all prey on basic human emotions. They either go straight for the money or deliver Trojan droppers as the first step toward infecting a device.

We’ve also seen consistent growth in Remote Access Trojan (RAT) activity, often used as an initial infection method. There’s also been a rise in finance-focused attacks, including cryptocurrency and banking-related targets, alongside widespread stealer malware driving data breaches.

What does this mean for 2026?

Taken together, these trends point to a clear shift. Cybercriminals are increasingly focusing on operating systems beyond Windows, combining advanced techniques and social engineering tailored specifically to mobile and macOS.

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We don’t just report on threats—we remove them

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.