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Mknod Process Activityedit

The Linux mknod program is sometimes used in the command payload of a remote command injection (RCI) and other exploits. It is used to export a command shell when the traditional version of netcat is not available to the payload.

Rule indices:

  • auditbeat-*

Severity: low

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-6m (Date Math format, see also Additional look-back time)

Maximum signals per execution: 100

References:

Tags:

  • Elastic
  • Linux

Rule version: 1

Added (Elastic Stack release): 7.6.0

Potential false positivesedit

Mknod is a Linux system program. Some normal use of this program, at varying levels of frequency, may originate from scripts, automation tools, and frameworks. Usage by web servers is more likely to be suspicious.

Rule queryedit

process.name: mknod and event.action:executed
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