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Unusual Linux Process Calling the Metadata Service

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Unusual Linux Process Calling the Metadata Service

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Looks for anomalous access to the metadata service by an unusual process. The metadata service may be targeted in order to harvest credentials or user data scripts containing secrets.

Rule type: machine_learning

Machine learning job: v3_linux_rare_metadata_process

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

Tags:

Elastic
Host
Linux
Threat Detection
ML
Credential Access

Version: 100 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

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

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Unsecured Credentials
- ID: T1552
- Reference URL: https://attack.mitre.org/techniques/T1552/

Rule version history

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Version 100 (8.5.0 release)

Formatting only

Version 5 (8.4.0 release)

Formatting only

Version 4 (8.3.0 release)

Formatting only

Version 3 (7.14.0 release)

Formatting only

Version 2 (7.12.0 release)

Formatting only

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