The Future of Threat Defense Resides at the IP Layer

For years, network security operated on a relatively predictable premise: inspect traffic, identify malicious content, and block it. Because deep content inspection created a seemingly robust defense in depth, relatively static legacy approaches—like reliance on threat intelligence feeds—were allowed to simply persist in the background.

The weaponization of agentic AI and highly evasive techniques has fundamentally shattered that model. Attackers are no longer just iterating on old threats. They are launching attacks at staggering velocity, completely outpacing threat feeds, and employing evasion tactics that actively starve legacy prevention solutions of the content they rely on to inspect.

Our new research report from Unit 42, Attackers Are Evading Threat Prevention at the Internet Edge, reveals how adversaries are actively exploiting the contextual vacuum at the IP layer to bypass standard security controls. For security leaders, understanding this shift is no longer optional. As the nature of the threat fundamentally changes, our strategic approach to network security must definitively change with it.

The AI-Accelerated, Evasive Attack Lifecycle

To understand why legacy defenses are failing, we must look at how adversaries are accelerating and obfuscating every stage of the attack lifecycle. As these threats progress, the commonly used network indicators we have long relied upon are vanishing, collapsing traditional defenses and leaving defenders with little to act on.

Powered by frontier AI, adversaries now automate reconnaissance and exploitation at huge scale and speed, while using anonymizers to mask their intent. Once an intrusion is launched, orchestration shifts to highly evasive command and control (C2). Attackers hide communications using advanced encryption and AI-built malware-less techniques. They’re also bypassing traditional web and DNS inspection entirely by routing traffic directly to IP addresses—a tactic Unit 42 found in 23% of modern malware

Ultimately, the takeaway is clear: network threat prevention can no longer rely solely on detecting malicious payloads. As AI-driven attacks continue to minimize their footprint, security strategies must augment content inspection with real-time IP layer monitoring to left-shift threat detection and counter these rapid, machine-speed threats at the network foundation.

Existing Approaches Aren’t Working

Where content-based detection falls short, many security vendors and organizations still rely on IP threat intelligence feeds to pick up the slack in an attempt to filter out malicious connections on the network layer. However, after years of operating under this model, the results are in—the traditional feed is showing its age.

Attackers have long relied on proxies, anonymizers, residential routers and public cloud providers as a tactic to evade detection. However, agentic AI morphs this process, enabling rapid infrastructure rotation and stealth at an unprecedented scale. As this autonomous evasion accelerates, experienced network defenders continue to run into the well-known limitations of classic IP blocklists:

• Too slow to keep pace: Unit 42 found an average 20-day lag time before new threats hit popular feeds. Because agentic AI enables adversaries to autonomously rotate proxy IPs in hours, these lists are obsolete at the moment of delivery.
• Fundamentally incomplete: IP feeds are unable to see a massive portion of the modern attack surface. Unit 42 research indicates that 52% of malicious IPs used for direct-to-IP connections are completely absent from these lists.
• Unactionable on shared infrastructure: Even known threats are often impossible to block. The Unit 42 team reports that 37% of direct-to-IP traffic uses reputable CDNs and cloud providers. IP feeds cannot distinguish malicious connections from legitimate ones, making blocking too risky for business continuity.
• A management nightmare: Among the security teams that Unit 42 polled, 30% indicate resource-intensive vetting and false-positive triage as their top pain point. To avoid breaking legitimate traffic, feeds are frequently relegated to an alert-only mode, defeating the entire purpose of prevention.

If modern and agentic AI-enabled attacks can outrun traditional network payload-based detections, we need a new weapon in the network defender’s arsenal. We can no longer depend on yesterday’s IP feeds to secure such an extremely agile threat environment.

The Blueprint for Modernizing the Internet Edge

To outpace the impact of agentic AI and advanced evasion on network threat prevention, security leaders must redefine their defense strategy and shift-left to track the attacker infrastructure itself—monitoring the exact IP layer locations where adversaries build and control their campaigns. Deep content inspection remains essential, but securing the modern edge requires establishing the context and intent of a connection before a session is established.

To achieve this goal, organizations must move beyond the limitations of static defense and adopt a modern security blueprint:

• Proactive protection against attacker infrastructure: While high-quality threat feeds remain essential for SOC investigations and incident response, relying on them for frontline, real-time prevention creates major blind spots. Instead, security teams must use real-world, global telemetry to proactively identify and block connections to attacker-controlled hosts before requesting a URL or file.
• Zero trust principles applied to the network layer: An IP address without a negative reputation does not equal a safe connection. Continuous verification requires extending zero trust down to the network foundation. It validates the real-time behavior and intent of every single session to ensure attackers cannot hide in the contextual vacuum of the IP layer.  
• Reducing the attack surface with rich contextual attributes: Traditional IP blocking is like a blunt instrument that creates unacceptable false positives and alert fatigue. To modernize the edge, security teams need deep, attribute-based visibility across the entire Internet address space to reduce noise and replace legacy IP feeds entirely.  

By moving away from point-in-time assumptions and embracing real-time, inline protection, security leaders can reclaim the advantage at the network foundation.

To see how these evasion tactics operate in the wild, read the latest Unit 42 report, Attackers Are Evading Threat Prevention at the Internet Edge. You’ll find this report valuable in understanding the systemic gaps in legacy risk models and learning why continuous verification must be our new mandate.

The post How AI and Evasion Demand a Radical Shift in Network Threat Prevention appeared first on Palo Alto Networks Blog.

24/7 Managed SOC Built for Tomorrow's Threats

The window for defense has collapsed, and most SOCs weren’t built for the speed of today’s attacks. According to the 2026 Unit 42^® Global Incident Response Report, some end-to-end attacks now unfold in under an hour. Attacks that used to take days or weeks now happen in minutes.

Most traditional SOC models are trapped in a cycle of alert overload, fragmented tools and limited engineering capacity that slow investigations and delay response. Traditional SIEM and MDR models were designed to react to alerts. They were not designed to continuously improve detections, correlations and response with threats that move at machine speed. Over time, that gap between attacker speed and defender capability keeps widening, and it’s exactly why we built Unit 42 Managed XSIAM 2.0 (MSIAM).

Today marks the availability of the next evolution of our managed SOC offering – one that reflects how modern security operations must run in today’s threat landscape. MSIAM 2.0 is built on Cortex XSIAM^®, Palo Alto Networks SOC transformation platform, and operated by Unit 42 analysts, threat hunters, responders and SOC engineers who handle the most complex incidents in the world. With this solution, Unit 42 provides organizations with a 24/7 managed SOC that delivers continuous detection, investigation and full-cycle remediation across the entire attack surface while improving operations over time.

We don’t just manage alerts. Unit 42 continuously engineers detections, correlations and response playbooks within XSIAM, refining them as attacker behavior evolves. This ongoing engineering ensures defenses improve over time, driven by real-world incidents and frontline threat intelligence, not static rules that quickly fall behind.

Why Managed XSIAM 2.0 Is Different

Elite SOC on Day One

We want SOC teams up and running as fast as possible. Experts lead onboarding, data mapping and configuration, and then your managed SOC team takes responsibility for operating and optimizing XSIAM on a day-to-day basis. The result is a SOC that improves over time without adding operational burden.

Every Threat Exposed

Unit 42 goes beyond reactive monitoring with continuous, proactive threat hunting across the entire attack surface. When a new threat is found in the wild, we produce threat impact reports that show how those techniques apply to each customer’s environment. We then translate those insights into custom detections and automated response actions, while also monitoring and investigating the correlation rules your team creates. Both the global threat intelligence and your unique use cases are backed by our 24/7 analysis, closing gaps quickly and strengthening defenses over time.

We also now support both native and third-party EDR telemetry, so organizations can benefit from Unit 42 expertise and Cortex^® AI-driven analytics, regardless of the security technologies they use today. This enables customers to receive the strongest possible managed defense now, while creating a natural, low-friction path toward deeper platform consolidation as their environment evolves.

Machine-Speed Response

When incidents escalate, we don’t just hand you a ticket; we take ownership. Collaborating with your team, we establish pre-authorized workflows to execute immediate responses across your entire environment, from endpoints and firewalls to identity and cloud. We pair the platform’s native speed with expert oversight. By validating threat context and business impact, every response action is precise and safe, giving you the confidence to unleash full-cycle remediation. This allows MSIAM 2.0 to move seamlessly from detection to resolution with both velocity and precision.

And we stand behind our solution with a Breach Response Guarantee. If a complex incident strikes, you have the world’s best responders in your corner with up to 250 hours of Unit 42 Incident Response included. This built-in coverage removes the administrative hurdles of crisis response, enabling our experts to immediately transition from monitoring to deep forensic investigation and complete eradication, so you can focus on recovery. 

Proven in the Real World with the Green Bay Packers

Working with Unit 42 and the Cortex XSIAM platform, the Green Bay Packers modernized their security across a complex hybrid environment, demonstrating what Unit 42's managed services deliver in real-world operations. By consolidating telemetry and accelerating investigation and response, they reduced response times from hours to minutes, investigated 54% more alerts and saved over 120 hours of analyst time without adding headcount.

These outcomes reflect the key benefits of MSIAM: Unit 42 experts working to apply frontline intelligence as new attacker behavior emerges, translating it into reporting and tailored detections that improve response where it matters most. When a machine-speed platform is operated by experts handling real incidents every day, defenses continuously strengthen as threats evolve.

The Future of the SOC

Unit 42 MSIAM 2.0 helps your SOC operate as it should by combining AI-driven analytics and automation with expert-led operations and engineering. This combination provides teams with the confidence that their defenses are always on, always improving and ready when it matters most. That’s the SOC that security leaders need today, and the one we’re building for tomorrow.

MSIAM is now delivered through two service tiers, Pro and Premium. Organizations can start where they are and grow at their own pace. Pro provides AI-driven managed SOC operations with continuous detection, investigation and response. Premium extends into full-lifecycle SOC engineering, with designated experts and customized detections, automation and tailored response playbooks as your security maturity grows.

To learn more about Managed XSIAM 2.0, join us at Symphony 2026, a Palo Alto Networks premier virtual SOC event, where Unit 42 and Cortex^® experts will share frontline threat intelligence from the new 2026 Unit 42 Incident Response Report alongside real-world SOC transformation insights from organizations operating at machine speed.

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