Potential Script Proxy Execution Via CL_Mutexverifiers.ps1
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About the rule
Rule Type
Standard
Rule Description
Detects the use of the Microsoft signed script "CL_mutexverifiers" to proxy the execution of additional PowerShell script commands
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PARENTPROCESSNAME endswith "\powershell.exe,\pwsh.exe" AND PROCESSNAME endswith "\powershell.exe" AND COMMANDLINE contains " -nologo -windowstyle minimized -file ") AND COMMANDLINE contains "\AppData\Local\Temp\,\Windows\Temp" select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
Nasreddine Bencherchali (Nextron Systems), oscd.community, Natalia Shornikova, frack113
