Suspicious Eventlog Clear
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About the rule
Rule Type
Standard
Rule Description
Detects usage of known powershell cmdlets such as "Clear-EventLog" to clear the Windows event logs
Severity
Trouble
Rule Requirement
Criteria
Action1:
actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "Clear-EventLog ,Remove-EventLog ,Limit-EventLog ,Clear-WinEvent " OR (SCRIPTEXECUTED contains "Eventing.Reader.EventLogSession" AND SCRIPTEXECUTED contains "ClearLog") OR SCRIPTEXECUTED contains "Diagnostics.EventLog,Clear"
select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED,Action1.DOMAIN,Action1.PATH,Action1.USERNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
