This documentation contains work-in-progress information for future Elastic Stack and Cloud releases. Use the version selector to view supported release docs. It also contains some Elastic Cloud serverless information. Check out our serverless docs for more details.
« Unusual Linux Network Activity Unusual Linux Network Port Activity »
Elastic Docs ›Elastic Security Solution [8.16] ›Detections and alerts ›Prebuilt rule reference

Unusual Linux Network Connection Discovery

edit

Unusual Linux Network Connection Discovery

edit

Looks for commands related to system network connection 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 network connection discovery in order to increase their understanding of connected services and systems. This information may be used to shape follow-up behaviors such as lateral movement or additional discovery.

Rule type: machine_learning

Machine learning job: v3_linux_network_connection_discovery

Machine learning anomaly threshold: 25

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: 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

edit

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

Rule version history

edit
Version 100 (8.5.0 release)
  • Formatting only
Version 3 (8.3.0 release)
  • Formatting only
Version 2 (7.12.0 release)
  • Formatting only
« Unusual Linux Network Activity Unusual Linux Network Port Activity »