AD Groups Or Users Enumeration Using PowerShell - ScriptBlock — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: low. Source dates: 2021-12-15 / 2022-12-25.

{
  "product": "windows",
  "category": "ps_script",
  "definition": "Requirements: Script Block Logging must be enabled"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 695b84b032461b14ba8ef4621ca46f49bcef8b617bfedbaa6a70aed2ad146abe

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: AD Groups Or Users Enumeration Using PowerShell - ScriptBlock
id: 88f0884b-331d-403d-a3a1-b668cf035603
status: test
description: |
    Adversaries may attempt to find domain-level groups and permission settings.
    The knowledge of domain-level permission groups can help adversaries determine which groups exist and which users belong to a particular group.
    Adversaries may use this information to determine which users have elevated permissions, such as domain administrators.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1069.002/T1069.002.md
author: frack113
date: 2021-12-15
modified: 2022-12-25
tags:
    - attack.discovery
    - attack.t1069.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    test_2:
        ScriptBlockText|contains: get-ADPrincipalGroupMembership
    test_7:
        ScriptBlockText|contains|all:
            - get-aduser
            - '-f '
            - '-pr '
            - DoesNotRequirePreAuth
    condition: 1 of test_*
falsepositives:
    - Unknown
level: low

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1069.002/T1069.002.md