LSASS Process Crashed - Application — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: experimental; severity: high. Source dates: 2022-12-07 / 2025-12-03.

{
  "product": "windows",
  "service": "application"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: f31a55b823f785fa279dac2889c2a19ce766f56d14f9057f5ba78439a726e8e1

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: LSASS Process Crashed - Application
id: a18e0862-127b-43ca-be12-1a542c75c7c5
status: experimental
description: |
    Detects Windows error reporting events where the process that crashed is LSASS (Local Security Authority Subsystem Service).
    This could be the cause of a provoked crash by techniques such as Lsass-Shtinkering to dump credentials.
references:
    - https://github.com/deepinstinct/Lsass-Shtinkering
    - https://media.defcon.org/DEF%20CON%2030/DEF%20CON%2030%20presentations/Asaf%20Gilboa%20-%20LSASS%20Shtinkering%20Abusing%20Windows%20Error%20Reporting%20to%20Dump%20LSASS.pdf
    - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/596a1078-e883-4972-9bbc-49e60bebca55
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-12-07
modified: 2025-12-03
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    product: windows
    service: application
detection:
    selection:
        Provider_Name: 'Application Error'
        EventID: 1000
        AppName: 'lsass.exe'
        ExceptionCode: 'c0000001' # STATUS_UNSUCCESSFUL
    condition: selection
falsepositives:
    - Rare legitimate crashing of the lsass process
level: high

Original YAML and metadata in JSON

False positives

• Rare legitimate crashing of the lsass process

Source references

• https://github.com/deepinstinct/Lsass-Shtinkering
• https://media.defcon.org/DEF%20CON%2030/DEF%20CON%2030%20presentations/Asaf%20Gilboa%20-%20LSASS%20Shtinkering%20Abusing%20Windows%20Error%20Reporting%20to%20Dump%20LSASS.pdf
• https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-erref/596a1078-e883-4972-9bbc-49e60bebca55