Microsoft Defender's Own Driver Can Be Weaponized to Delete Security Software at Boot
Check Point Research has disclosed a technique that uses Microsoft Defender's own legitimately signed boot-time remediation driver to perform arbitrary kernel-level file and registry operations on Windows systems ranging from Windows 7 through Windows 11 25H2, with no software flaw exploited and no driver imported from outside the machine. The driver, BTR.sys (Boot Time Removal Tool), is a
We haven't written up this one. The Hacker News has the full story — the link below goes straight to it.
