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Elastic Docs ›Elastic Security Solution [8.6] ›Detections and alerts ›Prebuilt rule reference

Suspicious LSASS Access via MalSecLogon

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Suspicious LSASS Access via MalSecLogon

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Identifies suspicious access to LSASS handle from a call trace pointing to seclogon.dll and with a suspicious access rights value. This may indicate an attempt to leak an LSASS handle via abusing the Secondary Logon service in preparation for credential access.

Rule type: eql

Rule indices:

  • winlogbeat-*
  • 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:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Credential Access
  • Data Source: Sysmon Only

Version: 106

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query
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process where host.os.type == "windows" and event.code == "10" and
  winlog.event_data.TargetImage : "?:\\WINDOWS\\system32\\lsass.exe" and

   /* seclogon service accessing lsass */
  winlog.event_data.CallTrace : "*seclogon.dll*" and process.name : "svchost.exe" and

   /* PROCESS_CREATE_PROCESS & PROCESS_DUP_HANDLE & PROCESS_QUERY_INFORMATION */
  winlog.event_data.GrantedAccess == "0x14c0"




Framework: MITRE ATT&CKTM
















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