IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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LSASS Memory Dump Creation

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LSASS Memory Dump Creation

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Identifies the creation of a Local Security Authority Subsystem Service (lsass.exe) default memory dump. This may indicate a credential access attempt via trusted system utilities such as Task Manager (taskmgr.exe) and SQL Dumper (sqldumper.exe) or known pentesting tools such as Dumpert and AndrewSpecial.

Rule type: eql

Rule indices:

winlogbeat-*
logs-endpoint.events.*
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: 11 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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file where file.name : ("lsass*.dmp", "dumpert.dmp", "Andrew.dmp",
"SQLDmpr*.mdmp", "Coredump.dmp") and not (process.executable :
("?:\\Program Files\\Microsoft SQL Server\\*\\Shared\\SqlDumper.exe",
"?:\\Windows\\System32\\dllhost.exe") and file.path :
("?:\\Program Files\\Microsoft SQL
Server\\*\\Shared\\ErrorDumps\\SQLDmpr*.mdmp",
"?:\\*\\Reporting Services\\Logfiles\\SQLDmpr*.mdmp")) and not
(process.executable : "?:\\WINDOWS\\system32\\WerFault.exe" and
file.path : "?:\\Windows\\System32\\config\\systemprofile\\AppData\\Lo
cal\\CrashDumps\\lsass.exe.*.dmp")

Threat mapping

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Framework: MITRE ATT&CK^TM

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

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Version 11 (8.4.0 release)

Updated query, changed from:

file where file.name : ("lsass*.dmp", "dumpert.dmp", "Andrew.dmp",
"SQLDmpr*.mdmp", "Coredump.dmp")

Version 9 (8.3.0 release)

Formatting only

Version 7 (8.2.0 release)

Formatting only

Version 5 (7.16.0 release)

Formatting only

Version 4 (7.13.0 release)

Updated query, changed from:

event.category:file and file.name:(lsass.DMP or lsass*.dmp or
dumpert.dmp or Andrew.dmp or SQLDmpr*.mdmp or Coredump.dmp)

Version 3 (7.12.0 release)

Formatting only

Version 2 (7.11.2 release)

Formatting only

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