Possible Impacket SecretDump Remote Activity - Zeek — Sigma Rule

Rule metadata and linked tags

Author: Samir Bousseaden, @neu5ron. Source status: test; severity: high. Source dates: 2020-03-19 / 2021-11-27.

{
  "product": "zeek",
  "service": "smb_files"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 4bd6f4053734bf7cb04bc69ba299c6f535bc5ed2da03bb552d300cf10b065152

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 - Zeek
id: 92dae1ed-1c9d-4eff-a567-33acbd95b00e
status: test
description: 'Detect AD credential dumping using impacket secretdump HKTL. Based on the SIGMA rules/windows/builtin/win_impacket_secretdump.yml'
references:
    - https://web.archive.org/web/20230329153811/https://blog.menasec.net/2019/02/threat-huting-10-impacketsecretdump.html
author: 'Samir Bousseaden, @neu5ron'
date: 2020-03-19
modified: 2021-11-27
tags:
    - attack.credential-access
    - attack.t1003.002
    - attack.t1003.004
    - attack.t1003.003
logsource:
    product: zeek
    service: smb_files
detection:
    selection:
        path|contains|all:
            - '\'
            - 'ADMIN$'
        name|contains: 'SYSTEM32\'
        name|endswith: '.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