Suspicious Execution of Powershell with Base64
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About the rule
Rule Type
Standard
Rule Description
Commandline to launch powershell with a base64 payload
Severity
Trouble
Rule Requirement
Criteria
Action1: actionname = "Process started" AND (PROCESSNAME endswith "\powershell.exe,\pwsh.exe" AND COMMANDLINE contains " -e , -en , -enc , -enco, -ec ") AND (COMMANDLINE notcontains " -Encoding " AND PARENTPROCESSNAME notcontains "C:\Packages\Plugins\Microsoft.GuestConfiguration.ConfigurationforWindows\,\gc_worker.exe") select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME
Detection
Execution Mode
realtime
Log Sources
Windows
Author
frack113
