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Enumeration of Kernel Modules via Proc

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Enumeration of Kernel Modules via Proc

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Loadable Kernel Modules (or LKMs) 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 identifies attempts to enumerate information about a kernel module using the /proc/modules filesystem. This filesystem is used by utilities such as lsmod and kmod to list the available kernel modules.

Rule type: new_terms

Rule indices:

  • auditbeat-*
  • logs-auditd_manager.auditd-*

Severity: low

Risk score: 21

Runs every: 60m

Searches indices from: now-119m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

  • OS: Linux
  • Use Case: Threat Detection
  • Tactic: Discovery
  • Rule Type: BBR

Version: 104

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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host.os.type:linux and event.category:file and event.action:"opened-file" and file.path:"/proc/modules"

Framework: MITRE ATT&CKTM

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