LSASS Memory Dump Creation

Elastic Stack Serverless Security

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.*
• endgame-*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

• https://github.com/outflanknl/Dumpert
• https://github.com/hoangprod/AndrewSpecial

Tags:

• Elastic
• Host
• Windows
• Threat Detection
• Credential Access
• Elastic Endgame

Version: 101

Rule authors:

• Elastic

Rule license: Elastic License v2

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&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/

• Sub-technique:

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