Invoke-Obfuscation RUNDLL LAUNCHER - PowerShell Module — Sigma Rule

Rule metadata and linked tags

Author: Timur Zinniatullin, oscd.community. Source status: test; severity: medium. Source dates: 2020-10-18 / 2022-11-29.

{
  "product": "windows",
  "category": "ps_module",
  "definition": "0ad03ef1-f21b-4a79-8ce8-e6900c54b65b"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: fce7692641d7c04bf88e4b695c5e65ac2086b2b362420e17953b4ae9a6a85548

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Invoke-Obfuscation RUNDLL LAUNCHER - PowerShell Module
id: a23791fe-8846-485a-b16b-ca691e1b03d4
related:
    - id: e6cb92b4-b470-4eb8-8a9d-d63e8583aae0
      type: derived
status: test
description: Detects Obfuscated Powershell via RUNDLL LAUNCHER
references:
    - https://github.com/SigmaHQ/sigma/issues/1009 # (Task 23)
author: Timur Zinniatullin, oscd.community
date: 2020-10-18
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.exe'
            - 'shell32.dll'
            - 'shellexec_rundll'
            - 'powershell'
    condition: selection_4103
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/SigmaHQ/sigma/issues/1009