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

Rule metadata and linked tags

Author: frack113. Source status: test; severity: low. Source dates: 2021-12-15 / 2023-01-20.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 429d6f73233cad8a676bbd8f9422c9cab0a37b934d8d7b68d3b1e7c1498b95ee

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 - PoshModule
id: 815bfc17-7fc6-4908-a55e-2f37b98cedb4
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: 2023-01-20
tags:
    - attack.discovery
    - attack.t1069.001
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection_ad_principal:
        - Payload|contains: 'get-ADPrincipalGroupMembership'
        - ContextInfo|contains: 'get-ADPrincipalGroupMembership'
    selection_get_aduser:
        - Payload|contains|all:
              - get-aduser
              - '-f '
              - '-pr '
              - DoesNotRequirePreAuth
        - ContextInfo|contains|all:
              - get-aduser
              - '-f '
              - '-pr '
              - DoesNotRequirePreAuth
    condition: 1 of selection_*
falsepositives:
    - Administrator script
level: low

Original YAML and metadata in JSON

False positives

• Administrator script

Source references

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