Potential Credential Dumping Via LSASS Process Clone — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems), Samir Bousseaden. Source status: test; severity: critical. Source dates: 2021-11-27 / 2023-03-02.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 74982f215f0649b319eec4f43d1d6c4e613dd9465e1ecea727124011c78347a0

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: Potential Credential Dumping Via LSASS Process Clone
id: c8da0dfd-4ed0-4b68-962d-13c9c884384e
status: test
description: Detects a suspicious LSASS process process clone that could be a sign of credential dumping activity
references:
    - https://www.matteomalvica.com/blog/2019/12/02/win-defender-atp-cred-bypass/
    - https://twitter.com/Hexacorn/status/1420053502554951689
    - https://twitter.com/SBousseaden/status/1464566846594691073?s=20
author: Florian Roth (Nextron Systems), Samir Bousseaden
date: 2021-11-27
modified: 2023-03-02
tags:
    - attack.credential-access
    - attack.t1003
    - attack.t1003.001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\Windows\System32\lsass.exe'
        Image|endswith: '\Windows\System32\lsass.exe'
    condition: selection
falsepositives:
    - Unknown
level: critical

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.matteomalvica.com/blog/2019/12/02/win-defender-atp-cred-bypass/
• https://twitter.com/Hexacorn/status/1420053502554951689
• https://twitter.com/SBousseaden/status/1464566846594691073?s=20