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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Unusual Windows Service

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Unusual Windows Service

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A machine learning job detected an unusual Windows service, This can indicate execution of unauthorized services, malware, or persistence mechanisms. In corporate Windows environments, hosts do not generally run many rare or unique services. This job helps detect malware and persistence mechanisms that have been installed and run as a service.

Rule type: machine_learning

Machine learning job: v3_windows_anomalous_service

Machine learning anomaly threshold: 50

Severity: low

Risk score: 21

Runs every: 15 minutes

Searches indices from: now-45m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://www.elastic.co/guide/en/security/current/prebuilt-ml-jobs.html

Tags:

Elastic
Host
Windows
Threat Detection
ML
Persistence

Version: 6 (version history)

Added (Elastic Stack release): 7.7.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

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A newly installed program or one that runs rarely as part of a monthly or quarterly workflow could trigger this alert. ==== Threat mapping

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Create or Modify System Process
- ID: T1543
- Reference URL: https://attack.mitre.org/techniques/T1543/

Rule version history

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Version 6 (8.4.0 release)

Formatting only

Version 5 (8.3.0 release)

Formatting only

Version 4 (7.12.0 release)

Formatting only

Version 3 (7.10.0 release)

Formatting only

Version 2 (7.9.0 release)

Formatting only

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