Mimikatz Memssp Log File Detected

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Identifies the password log file from the default Mimikatz memssp module.

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

Tags:

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

Version: 4 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

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file where file.name : "mimilsa.log" and process.name : "lsass.exe"

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 4 (7.13.0 release)
  • Updated query, changed from:

    event.category:file and file.name:mimilsa.log and
    process.name:lsass.exe
Version 3 (7.12.0 release)
  • Formatting only
Version 2 (7.11.2 release)
  • Formatting only