Possible Impacket SecretDump Remote Activity — Sigma Rule

Rule metadata and linked tags

Author: Samir Bousseaden, wagga. Source status: test; severity: high. Source dates: 2019-04-03 / 2022-08-11.

{
  "product": "windows",
  "service": "security",
  "definition": "The advanced audit policy setting \"Object Access > Audit Detailed File Share\" must be configured for Success/Failure"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 7d5d4d514f461f4ea2a8090493cc8753aab57c9ba6d6f4b4cddd1ee5ad21753c

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: Possible Impacket SecretDump Remote Activity
id: 252902e3-5830-4cf6-bf21-c22083dfd5cf
status: test
description: Detect AD credential dumping using impacket secretdump HKTL
references:
    - https://web.archive.org/web/20230329153811/https://blog.menasec.net/2019/02/threat-huting-10-impacketsecretdump.html
author: Samir Bousseaden, wagga
date: 2019-04-03
modified: 2022-08-11
tags:
    - attack.credential-access
    - attack.t1003.002
    - attack.t1003.004
    - attack.t1003.003
logsource:
    product: windows
    service: security
    definition: 'The advanced audit policy setting "Object Access > Audit Detailed File Share" must be configured for Success/Failure'
detection:
    selection:
        EventID: 5145
        ShareName: '\\\\\*\\ADMIN$'  # looking for the string  \\*\ADMIN$
        RelativeTargetName|contains|all:
            - 'SYSTEM32\'
            - '.tmp'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://web.archive.org/web/20230329153811/https://blog.menasec.net/2019/02/threat-huting-10-impacketsecretdump.html