Password Dumper Remote Thread in LSASS — Sigma Rule

Rule metadata and linked tags

Author: Thomas Patzke. Source status: stable; severity: high. Source dates: 2017-02-19 / 2021-06-21.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: edd8de9c4c4a509db4fe379624cd4badc34cfe6aeb305196f9d429ac8cbd24fd

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: Password Dumper Remote Thread in LSASS
id: f239b326-2f41-4d6b-9dfa-c846a60ef505
status: stable
description: |
    Detects password dumper activity by monitoring remote thread creation EventID 8 in combination with the lsass.exe process as TargetImage.
    The process in field Process is the malicious program. A single execution can lead to hundreds of events.
references:
    - https://jpcertcc.github.io/ToolAnalysisResultSheet/details/WCE.htm
author: Thomas Patzke
date: 2017-02-19
modified: 2021-06-21
tags:
    - attack.credential-access
    - attack.s0005
    - attack.t1003.001
logsource:
    product: windows
    category: create_remote_thread
detection:
    selection:
        TargetImage|endswith: '\lsass.exe'
        StartModule: ''
    condition: selection
falsepositives:
    - Antivirus products
level: high

Original YAML and metadata in JSON

False positives

• Antivirus products

Source references

• https://jpcertcc.github.io/ToolAnalysisResultSheet/details/WCE.htm