title: Invoke-Obfuscation Via Stdin - PowerShell Module
id: c72aca44-8d52-45ad-8f81-f96c4d3c755e
related:
    - id: 86b896ba-ffa1-4fea-83e3-ee28a4c915c7
      type: derived
status: test
description: Detects Obfuscated Powershell via Stdin in Scripts
references:
    - https://github.com/SigmaHQ/sigma/issues/1009  # (Task28)
author: Nikita Nazarov, oscd.community
date: 2020-10-12
modified: 2024-04-05
tags:
    - attack.stealth
    - attack.t1027
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection_4103:
        Payload|re: '(?i)(set).*&&\s?set.*(environment|invoke|\$?\{?input).*&&.*"'
    condition: selection_4103
falsepositives:
    - Unknown
level: high