Invoke-Obfuscation Via Use Rundll32 - PowerShell Module

Title: Invoke-Obfuscation Via Use Rundll32 - PowerShell Module
Status: test
Description:Detects Obfuscated Powershell via use Rundll32 in Scripts
References:
  -https://github.com/SigmaHQ/sigma/issues/1009
Author: Nikita Nazarov, oscd.community
Date: 2019-10-08
modified:2022-11-29
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|contains|all:
      -'&&'
      -'rundll32'
      -'shell32.dll'
      -'shellexec_rundll'

    Payload|contains:
      -'value'
      -'invoke'
      -'comspec'
      -'iex'

  condition:selection_4103
Falsepositives:
  -Unknown
Level: high