The exploitation is mitigated by preventing the FsTx Auto Recovery Utility from starting when the WinRE image launches.

The post Microsoft Rolls Out Mitigations for ‘YellowKey’ BitLocker Bypass appeared first on SecurityWeek.

It’s nasty, but it requires physical access to the computer:

The exploit, named YellowKey, was published earlier this week by a researcher who goes by the alias Nightmare-Eclipse. It reliably bypasses default Windows 11 deployments of BitLocker, the full-volume encryption protection Microsoft provides to make disk contents off-limits to anyone without the decryption key, which is stored in a secured piece of hardware known as a trusted platform module (TPM). BitLocker is a mandatory protection for many organizations, including those that contract with governments.

Slashdot thread. And here’s Nightmare-Eclipse’s GitHub account.

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The post Bitlocker Ransomware: Using BitLocker for Nefarious Reasons appeared first on Black Hills Information Security, Inc..