PUA - Suspicious ActiveDirectory Enumeration Via AdFind.EXE — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: high. Source dates: 2021-12-13 / 2023-03-05.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 01573ac02273236d843dceaa203d08fa3c0e00579623df8a33e6f43a52f090ae

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: PUA - Suspicious ActiveDirectory Enumeration Via AdFind.EXE
id: 455b9d50-15a1-4b99-853f-8d37655a4c1b
related:
    - id: 9a132afa-654e-11eb-ae93-0242ac130002
      type: similar
    - id: 514e7e3e-b3b4-4a67-af60-be20f139198b
      type: similar
status: test
description: Detects active directory enumeration activity using known AdFind CLI flags
references:
    - https://www.joeware.net/freetools/tools/adfind/
    - https://social.technet.microsoft.com/wiki/contents/articles/7535.adfind-command-examples.aspx
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1087.002/T1087.002.md
author: frack113
date: 2021-12-13
modified: 2023-03-05
tags:
    - attack.discovery
    - attack.t1087.002
logsource:
    product: windows
    category: process_creation
detection:
    selection_password: # Listing password policy
        CommandLine|contains:
            - lockoutduration
            - lockoutthreshold
            - lockoutobservationwindow
            - maxpwdage
            - minpwdage
            - minpwdlength
            - pwdhistorylength
            - pwdproperties
    selection_enum_ad: # Enumerate Active Directory Admins
        CommandLine|contains: '-sc admincountdmp'
    selection_enum_exchange: # Enumerate Active Directory Exchange AD Objects
        CommandLine|contains: '-sc exchaddresses'
    condition: 1 of selection_*
falsepositives:
    - Authorized administrative activity
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_pua_adfind_enumeration/info.yml

Original YAML and metadata in JSON

False positives

• Authorized administrative activity

Source references

• https://www.joeware.net/freetools/tools/adfind/
• https://social.technet.microsoft.com/wiki/contents/articles/7535.adfind-command-examples.aspx
• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1087.002/T1087.002.md