LSASS Memory Dump Creation

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: 5m

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

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

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\\Local\\CrashDumps\\lsass.exe.*.dmp")

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/
Sub-technique:
- Name: LSASS Memory
- ID: T1003.001
- Reference URL: https://attack.mitre.org/techniques/T1003/001/

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