Disable Windows Defender AV Security Monitoring
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About the rule
Rule Type
Standard
Rule Description
Detects attackers attempting to disable Windows Defender using Powershell
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND ((PROCESSNAME endswith "\powershell.exe,\pwsh.exe" OR ORIGINALFILENAME = "PowerShell.EXE,pwsh.dll") AND COMMANDLINE contains "-DisableBehaviorMonitoring $true,-DisableRuntimeMonitoring $true") OR ((PROCESSNAME endswith "\sc.exe" OR ORIGINALFILENAME = "sc.exe") AND ((COMMANDLINE contains "stop" AND COMMANDLINE contains "WinDefend") OR (COMMANDLINE contains "delete" AND COMMANDLINE contains "WinDefend") OR (COMMANDLINE contains "config" AND COMMANDLINE contains "WinDefend" AND COMMANDLINE contains "start=disabled"))) select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
ok @securonix invrep-de, oscd.community, frack113
