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 Process Access via Windows API

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LSASS Process Access via Windows API

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Identifies access attempts to the LSASS handle, which may indicate an attempt to dump credentials from LSASS memory.

Rule type: eql

Rule indices:

logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1003.001/T1003.001.md

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Credential Access
Tactic: Execution
Data Source: Elastic Defend

Version: 5

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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api where host.os.type == "windows" and
  process.Ext.api.name in ("OpenProcess", "OpenThread") and Target.process.name : "lsass.exe" and
  not
  (
    process.executable : (
        "?:\\ProgramData\\GetSupportService*\\Updates\\Update_*.exe",
        "?:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\*\\MsMpEng.exe",
        "?:\\Program Files (x86)\\Asiainfo Security\\OfficeScan Client\\NTRTScan.exe",
        "?:\\Program Files (x86)\\Blackpoint\\SnapAgent\\SnapAgent.exe",
        "?:\\Program Files (x86)\\eScan\\reload.exe",
        "?:\\Program Files (x86)\\Google\\Update\\GoogleUpdate.exe",
        "?:\\Program Files (x86)\\Kaspersky Lab\\*\\avp.exe",
        "?:\\Program Files (x86)\\N-able Technologies\\Reactive\\bin\\NableReactiveManagement.exe",
        "?:\\Program Files (x86)\\N-able Technologies\\Windows Agent\\bin\\agent.exe",
        "?:\\Program Files (x86)\\Trend Micro\\*\\CCSF\\TmCCSF.exe",
        "?:\\Program Files*\\Windows Defender\\MsMpEng.exe",
        "?:\\Program Files\\Bitdefender\\Endpoint Security\\EPSecurityService.exe",
        "?:\\Program Files\\Cisco\\AMP\\*\\sfc.exe",
        "?:\\Program Files\\Common Files\\McAfee\\AVSolution\\mcshield.exe",
        "?:\\Program Files\\EA\\AC\\EAAntiCheat.GameService.exe",
        "?:\\Program Files\\Elastic\\Agent\\data\\elastic-agent-*\\components\\metricbeat.exe",
        "?:\\Program Files\\Elastic\\Agent\\data\\elastic-agent-*\\components\\osqueryd.exe",
        "?:\\Program Files\\Elastic\\Agent\\data\\elastic-agent-*\\components\\packetbeat.exe",
        "?:\\Program Files\\ESET\\ESET Security\\ekrn.exe",
        "?:\\Program Files\\Fortinet\\FortiClient\\FortiProxy.exe",
        "?:\\Program Files\\Huntress\\HuntressAgent.exe",
        "?:\\Program Files\\LogicMonitor\\Agent\\bin\\sbshutdown.exe",
        "?:\\Program Files\\Microsoft Security Client\\MsMpEng.exe",
        "?:\\Program Files\\Qualys\\QualysAgent\\QualysAgent.exe",
        "?:\\Program Files\\TDAgent\\ossec-agent\\ossec-agent.exe",
        "?:\\Program Files\\Topaz OFD\\Warsaw\\core.exe",
        "?:\\Program Files\\VMware\\VMware Tools\\vmtoolsd.exe",
        "?:\\Windows\\AdminArsenal\\PDQDeployRunner\\*\\exec\\Sysmon64.exe",
        "?:\\Windows\\Sysmon.exe",
        "?:\\Windows\\Sysmon64.exe",
        "?:\\Windows\\System32\\csrss.exe",
        "?:\\Windows\\System32\\MRT.exe",
        "?:\\Windows\\System32\\msiexec.exe",
        "?:\\Windows\\System32\\RtkAudUService64.exe",
        "?:\\Windows\\System32\\wbem\\WmiPrvSE.exe",
        "?:\\Windows\\SysWOW64\\wbem\\WmiPrvSE.exe"
    ) and process.code_signature.trusted == true
  )

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/
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Native API
- ID: T1106
- Reference URL: https://attack.mitre.org/techniques/T1106/

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