LSASS Process Crashed - Application

Status: experimental
Severity: high
Log source: product windows, service application
Author: Nasreddine Bencherchali (Nextron Systems)
Source: github.com/SigmaHQ/sigma

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.

Known false positives

Rare legitimate crashing of the lsass process

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1003.001` OS Credential Dumping: LSASS Memory

Telemetry coverage

Provider	Record / event type
Application-Error	Event ID 1000: Faulting application name: Faulting_application_name, version: version, time stamp: 0xFaulting_module_name.

Rule body

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

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Provider_Name: 'Application Error'
    EventID: 1000
    AppName: 'lsass.exe'
    ExceptionCode: 'c0000001'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`AppName`	eq	`lsass.exe` corpus 2 (sigma 2)	`field:"AppName" kind:eq value:"lsass.exe"`
`ExceptionCode`	eq	`c0000001`	`field:"ExceptionCode" kind:eq value:"c0000001"`
`Provider_Name`	eq	`Application Error` corpus 5 (sigma 5)	`field:"Provider_Name" kind:eq value:"Application Error"`