The SIEM app is now a part of the Elastic Security solution.
Click
here to view the current documentation.
IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
Unusual Linux Network Port Activityedit
Identifies unusual destination port activity that can indicate command-and- control, persistence mechanism, or data exfiltration activity. Rarely used destination port activity is generally unusual in Linux fleets, and can indicate unauthorized access or threat actor activity.
Rule type: machine_learning
Machine learning job: linux_anomalous_network_port_activity_ecs
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 signals per execution: 100
References:
Tags:
- Elastic
- Linux
- ML
Version: 1
Added (Elastic Stack release): 7.7.0
Potential false positivesedit
A newly installed program or one that rarely uses the network could trigger this signal.