Suspicious Service DACL Modification Via Set-Service Cmdlet - PS
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About the rule
Rule Type
Standard
Rule Description
Detects usage of the "Set-Service" powershell cmdlet to configure a new SecurityDescriptor that allows a service to be hidden from other utilities such as "sc.exe", "Get-Service"...etc. (Works only in powershell 7)
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "PowerShell Script Block Logged" AND SCRIPTEXECUTED contains "-SecurityDescriptorSddl ,-sd " AND ((SCRIPTEXECUTED contains "Set-Service " AND SCRIPTEXECUTED contains "D;;") AND SCRIPTEXECUTED contains ";;;IU,;;;SU,;;;BA,;;;SY,;;;WD") select Action1.HOSTNAME,Action1.MESSAGE,Action1.SCRIPTEXECUTED
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems)
