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Insider Threat Matrix™

  • ID: AF002.002
  • Created: 25th May 2024
  • Updated: 04th August 2025
  • Platform: Linux
  • Contributor: The ITM Team

Clear Linux System Logs

A subject deletes Linux system logs to obscure or eliminate evidence of an infringement. Linux log files, such as authentication attempts, sudo usage, system errors, and audit trails, serve as critical forensic artifacts during post-incident analysis. These logs are commonly stored in /var/log, and include files such as auth.log, syslog, messages, and secure.

 

Deletion may occur manually via the rm command, through scripted automation, or by modifying log rotation settings to erase historical activity.

Prevention

ID Name Description
PV002Restrict Access to Administrative Privileges

The Principle of Least Privilege should be enforced, and period reviews of permissions conducted to ensure that accounts have the minimum level of access required to complete duties as per their role.

Detection

ID Name Description
DT014Utilize Cold Storage for Logs

By autonomously collecting log files from a system and transporting them to another system, such as a SIEM collector, they are typically no longer accessible by the subject, preventing them from being able to delete them. These can aid in investigations where a subject has deleted local logs.