Invoke-Obfuscation Via Stdin

Title: Invoke-Obfuscation Via Stdin
Status: test
Description:Detects Obfuscated Powershell via Stdin in Scripts
References:
  -https://github.com/SigmaHQ/sigma/issues/1009
Author: Nikita Nazarov, oscd.community
Date: 2020-10-12
modified:2026-03-16
Tags:

• -'attack.stealth'
• -'attack.t1027'
• -'attack.execution'
• -'attack.t1059.001'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection:
    CommandLine|re: '(?i)(?:set).*&&\s?set.*(?:environment|invoke|\$\{?input).*&&.*"'
  condition:selection
Falsepositives:
  -Unknown
Level: high