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

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https://thehackernews.com/2026/08/microsoft-defenders-own-driver-can-be.html

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https://thehackernews.com/2026/08/microsoft-defenders-own-driver-can-be.html

id: 2671
uid: LA51q
insdate: 2026-08-21 17:10:08
title: Microsoft Defender's Own Driver Can Be Weaponized to Delete Security Software at Boot
additional: 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
category: Cybersecurity
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guid: https://thehackernews.com/2026/08/microsoft-defenders-own-driver-can-be.html
source_url: https://thehackernews.com/2026/08/microsoft-defenders-own-driver-can-be.html
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