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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
- Sysmon Only
Version: 101 (version history)
Added (Elastic Stack release): 8.0.0
Last modified (Elastic Stack release): 8.6.0
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 101 (8.6.0 release)
-
- Formatting only
- 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")
-