Obfuscated PowerShell MSI Install via WindowsInstaller COM
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About the rule
Rule Type
Standard
Rule Description
Detects obfuscated PowerShell that hides MSI installation through WindowsInstaller.Installer COM, a common malware dropper technique.
Severity
Attention
Rule Requirement
Criteria
Action1:
actionname = "Process started" AND (( PROCESSNAME endswith "\powershell_ise.exe,\powershell.exe,\pwsh.exe" OR ORIGINALFILENAME = "powershell_ise.exe,PowerShell.exe,pwsh.dll" ) AND ( COMMANDLINE contains "-ComObject" AND COMMANDLINE contains "InstallProduct(" AND COMMANDLINE contains ".Insert(" AND COMMANDLINE contains "UILevel" ))
select Action1.HOSTNAME,Action1.MESSAGE,Action1.COMMANDLINE,Action1.FILE_NAME,Action1.PROCESSNAME,Action1.USERNAME,Action1.PARENTPROCESSNAME,Action1.DOMAIN,Action1.ORIGINALFILENAME,Action1.PARENTPROCESSID,Action1.PROCESSID,Action1.PRODUCT_NAME,Action1.SECURITYID
Detection
Execution Mode
realtime
Log Sources
Windows
Author
@Meroujan Antonyan (vx3r)
