Credential Dumping Attempt Via WerFault
Detects process LSASS memory dump using Mimikatz, NanoDump, Invoke-Mimikatz, Procdump or Taskmgr based on the CallTrace pointing to ntdll.dll, dbghelp.dll or dbgcore.dll for win10, server2016 and up.
Detection logic
selection
SourceImage|endswith: \WerFault.exe
TargetImage|endswith: \lsass.exe
GrantedAccess: "0x1FFFFF"Condition
selectionRaw YAML
title: Credential Dumping Attempt Via WerFault
id: e5b33f7d-eb93-48b6-9851-09e1e610b6d7
status: test
description: Detects process LSASS memory dump using Mimikatz, NanoDump, Invoke-Mimikatz, Procdump or Taskmgr based on the CallTrace pointing to ntdll.dll, dbghelp.dll or dbgcore.dll for win10, server2016 and up.
references:
- https://github.com/helpsystems/nanodump/commit/578116faea3d278d53d70ea932e2bbfe42569507
author: Florian Roth (Nextron Systems)
date: 2012-06-27
modified: 2023-11-29
tags:
- attack.credential-access
- attack.t1003.001
- attack.s0002
logsource:
category: process_access
product: windows
detection:
selection:
SourceImage|endswith: '\WerFault.exe'
TargetImage|endswith: '\lsass.exe'
GrantedAccess: '0x1FFFFF'
condition: selection
falsepositives:
- Actual failures in lsass.exe that trigger a crash dump (unlikely)
- Unknown cases in which WerFault accesses lsass.exe
level: highFalse positives
- Actual failures in lsass.exe that trigger a crash dump (unlikely)
- Unknown cases in which WerFault accesses lsass.exe
References
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