title: Invoke-Obfuscation STDIN+ Launcher
id: 9ac8b09b-45de-4a07-9da1-0de8c09304a3
related:
    - id: 779c8c12-0eb1-11eb-adc1-0242ac120002
      type: derived    
description: Detects Obfuscated use of stdin to execute PowerShell
status: experimental
author: Jonathan Cheong, oscd.community
date: 2020/10/15
references:
     - https://github.com/Neo23x0/sigma/issues/1009 #(Task 25)
tags:
    - attack.defense_evasion
    - attack.t1027
    - attack.execution
    - attack.t1059.001
logsource:
    product: windows
    service: powershell
    definition: Module Logging must be enable
detection:
    selection_4103:
        EventID: 4103
        Payload|re: '.*cmd.{0,5}(?:\/c|\/r).+powershell.+(?:\$\{?input\}?|noexit).+\"'
    condition: selection_4103
falsepositives:
    - Unknown
level: high