title: Invoke-Obfuscation Via Stdin
id: 9c14c9fa-1a63-4a64-8e57-d19280559490
description: Detects Obfuscated Powershell via Stdin in Scripts
status: experimental
author: Nikita Nazarov, oscd.community
date: 2020/10/12
references:
    - https://github.com/Neo23x0/sigma/issues/1009 #(Task28)
tags:
    - attack.defense_evasion
    - 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