Microsoft Defender Disabled via Set-MpPreference or Service Commands Prior to Ransomware

Ibrahim Saud@tektrix

•updated Jun 30, 2026•7•0•9

Detects attempts to disable or tamper with Microsoft Defender Antivirus settings, services, or processes. This includes the use of Set-MpPreference to change configuration, service control (sc) to stop the WinDefend service, process termination via taskkill, or the execution of known removal scripts like DisableDefender.ps1.