File Permission Modification in Writable Directoryedit

Identifies file permission modifications in common writable directories by a non-root user. Adversaries often drop files or payloads into a writable directory and change permissions prior to execution.

Rule type: new_terms

Rule indices:

  • auditbeat-*

Severity: low

Risk score: 21

Runs every: 5m

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

Maximum alerts per execution: 100

References: None


  • Domain: Endpoint
  • OS: Linux
  • Use Case: Threat Detection
  • Tactic: Defense Evasion
  • Data Source: Elastic Defend

Version: 208

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule queryedit

host.os.type:linux and event.category:process and event.type:start and or chgrp or chmod or chown) and
not (apt-key or update-motd-updates-available)) and
process.working_directory:(/dev/shm or /tmp or /var/tmp)