Invoke-Obfuscation Via Use MSHTA — Sigma Rule

Rule metadata and linked tags

Author: Nikita Nazarov, oscd.community. Source status: test; severity: high. Source dates: 2020-10-08 / 2022-03-08.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 20b0b6a7209c5fd7998ff797fe119812283dc12c3fe1d81482ba56deb983f0b0

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 Via Use MSHTA
id: ac20ae82-8758-4f38-958e-b44a3140ca88
status: test
description: Detects Obfuscated Powershell via use MSHTA in Scripts
references:
    - https://github.com/SigmaHQ/sigma/issues/1009   # (Task31)
author: Nikita Nazarov, oscd.community
date: 2020-10-08
modified: 2022-03-08
tags:
    - attack.stealth
    - attack.t1027
    - attack.execution
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'set'
            - '&&'
            - 'mshta'
            - 'vbscript:createobject'
            - '.run'
            - '(window.close)'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

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