{"id":"e5b33f7d-eb93-48b6-9851-09e1e610b6d7","title":"Credential Dumping Attempt Via WerFault","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.","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2012-06-27","modified":"2023-11-29","tags":["attack.credential-access","attack.t1003.001","attack.s0002"],"technique_ids":["T1003.001"],"logsource":{"category":"process_access","product":"windows"},"falsepositives":["Actual failures in lsass.exe that trigger a crash dump (unlikely)","Unknown cases in which WerFault accesses lsass.exe"],"references":["https://github.com/helpsystems/nanodump/commit/578116faea3d278d53d70ea932e2bbfe42569507"],"source_path":"rules/windows/process_access/proc_access_win_lsass_werfault.yml","source_sha256":"e7a546502881b53beefa9ae3588e297646363dd2897b11254a801b9431133a05","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/process_access/proc_access_win_lsass_werfault.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Credential Dumping Attempt Via WerFault\nid: e5b33f7d-eb93-48b6-9851-09e1e610b6d7\nstatus: test\ndescription: 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.\nreferences:\n    - https://github.com/helpsystems/nanodump/commit/578116faea3d278d53d70ea932e2bbfe42569507\nauthor: Florian Roth (Nextron Systems)\ndate: 2012-06-27\nmodified: 2023-11-29\ntags:\n    - attack.credential-access\n    - attack.t1003.001\n    - attack.s0002\nlogsource:\n    category: process_access\n    product: windows\ndetection:\n    selection:\n        SourceImage|endswith: '\\WerFault.exe'\n        TargetImage|endswith: '\\lsass.exe'\n        GrantedAccess: '0x1FFFFF'\n    condition: selection\nfalsepositives:\n    - Actual failures in lsass.exe that trigger a crash dump (unlikely)\n    - Unknown cases in which WerFault accesses lsass.exe\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1003.001","id":"T1003.001","name":"LSASS Memory","page":"techniques/enterprise/T1003.001/"}],"data_path":"data/detection-rules/e5b33f7d-eb93-48b6-9851-09e1e610b6d7.json","kind":"sigma"}