sigmahighHunting

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.

MITRE ATT&CK

T1003.001 S0002

credential-access

Detection Query

selection:
  SourceImage|endswith: \WerFault.exe
  TargetImage|endswith: \lsass.exe
  GrantedAccess: "0x1FFFFF"
condition: selection

Author

Florian Roth (Nextron Systems)

Created

2012-06-27

Data Sources

windowsProcess Access Events

Platforms

windows

References

https://github.com/helpsystems/nanodump/commit/578116faea3d278d53d70ea932e2bbfe42569507

Tags

attack.credential-accessattack.t1003.001attack.s0002

Raw Content

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: high