Unusual Linux Process Discovery Activity

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Looks for commands related to system process discovery from an unusual user context. This can be due to uncommon troubleshooting activity or due to a compromised account. A compromised account may be used by a threat actor to engage in system process discovery in order to increase their understanding of software applications running on a target host or network. This may be a precursor to selection of a persistence mechanism or a method of privilege elevation.

Rule type: machine_learning

Machine learning job: linux_system_process_discovery

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

Version: 1

Added (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Potential false positives

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Uncommon user command activity can be due to an engineer logging onto a server instance in order to perform manual troubleshooting or reconfiguration. ==== Threat mapping

Framework: MITRE ATT&CKTM

Framework: MITRE ATT&CKTM