
title: Invoke-Obfuscation Via Stdin
author: Nikita Nazarov, oscd.community
date: 2020/10/12
description: Detects Obfuscated Powershell via Stdin in Scripts
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    CommandLine|re: (?i).*(set).*&&\s?set.*(environment|invoke|\$\{?input).*&&.*"
  condition: (SELECTION_1 and SELECTION_2)
falsepositives:
- Unknown
id: 9c14c9fa-1a63-4a64-8e57-d19280559490
level: high
logsource:
  category: process_creation
  product: windows
references:
- https://github.com/Neo23x0/sigma/issues/1009
status: experimental
tags:
- attack.defense_evasion
- attack.t1027
- attack.execution
- attack.t1059.001
ruletype: SIGMA
