Kernel Module Removal

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Kernel modules are pieces of code that can be loaded and unloaded into the kernel upon demand. They extend the functionality of the kernel without the need to reboot the system. This rule identifies attempts to remove a kernel module.

Rule type: query

Rule indices:

  • auditbeat-*
  • logs-endpoint.events.*
  • endgame-*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Host
  • Linux
  • Threat Detection
  • Defense Evasion
  • Elastic Endgame

Version: 103

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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event.category:process and host.os.type:linux and event.type:(start or process_started) and
  process.args:((rmmod and sudo) or (modprobe and sudo and ("--remove" or "-r")))

Framework: MITRE ATT&CKTM