WerFault LSASS Process Memory Dump

Description

Detects WerFault creating a dump file with a name that indicates that the dump file could be an LSASS process memory, which contains user credentials

Query · sigma

selection:
  Image: C:\WINDOWS\system32\WerFault.exe
  TargetFilename|contains:
  - \lsass
  - lsass.exe
condition: selection

Known false positives

  • Unknown
Raw source WerFault LSASS Process Memory Dump · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: WerFault LSASS Process Memory Dump
id: c3e76af5-4ce0-4a14-9c9a-25ceb8fda182
status: test
description: Detects WerFault creating a dump file with a name that indicates that the dump file could be an LSASS process memory, which contains user credentials
references:
    - https://github.com/helpsystems/nanodump
author: Florian Roth (Nextron Systems)
date: 2022-06-27
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    product: windows
    category: file_event
detection:
    selection:
        Image: C:\WINDOWS\system32\WerFault.exe
        TargetFilename|contains:
            - '\lsass'
            - 'lsass.exe'
    condition: selection
falsepositives:
    - Unknown
level: high

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