IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential Credential Access via LSASS Memory Dump
editPotential Credential Access via LSASS Memory Dump
editIdentifies suspicious access to LSASS handle from a call trace pointing to DBGHelp.dll or DBGCore.dll, which both export the MiniDumpWriteDump method that can be used to dump LSASS memory content in preparation for credential access.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Credential Access
Version: 100 (version history)
Added (Elastic Stack release): 8.0.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guide
editRule query
editprocess where event.code == "10" and winlog.event_data.TargetImage :
"?:\\WINDOWS\\system32\\lsass.exe" and /* DLLs exporting
MiniDumpWriteDump API to create an lsass mdmp*/
winlog.event_data.CallTrace : ("*dbghelp*", "*dbgcore*") and /*
case of lsass crashing */ not process.executable :
("?:\\Windows\\System32\\WerFault.exe",
"?:\\Windows\\System32\\WerFaultSecure.exe")
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: OS Credential Dumping
- ID: T1003
- Reference URL: https://attack.mitre.org/techniques/T1003/
Rule version history
edit- Version 100 (8.5.0 release)
-
- Formatting only
- Version 6 (8.4.0 release)
-
-
Updated query, changed from:
process where event.code == "10" and winlog.event_data.TargetImage : "?:\\WINDOWS\\system32\\lsass.exe" and /* DLLs exporting MiniDumpWriteDump API to create an lsass mdmp*/ winlog.event_data.CallTrace : ("*dbghelp*", "*dbgcore*") and /* case of lsass crashing */ not process.executable : ("?:\\Windows\\System32\\WerFault.exe", "?:\\Windows\\System32\\WerFaultSecure.exe")
-
- Version 4 (8.2.0 release)
-
- Formatting only
- Version 3 (8.1.0 release)
-
-
Updated query, changed from:
process where event.code == "10" and winlog.event_data.TargetImage : "?:\\WINDOWS\\system32\\lsass.exe" and /* DLLs exporting MiniDumpWriteDump API to create an lsass mdmp*/ winlog.event_data.CallTrace : ("*dbhelp*", "*dbgcore*") and /* case of lsass crashing */ not process.executable : ("?:\\Windows\\System32\\WerFault.exe", "?:\\Windows\\System32\\WerFaultSecure.exe")
-