File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

Deletes itself

Deletes journal logs

Deletes systemd journal logs. Likely to evade detection.

Deletes system logs

Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.

Modifies Watchdog functionality

Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

Creates/modifies Cron job

Cron allows running tasks on a schedule, and is commonly used for malware persistence.

Enumerates running processes

Discovers information about currently running processes on the system

Modifies init.d

Adds/modifies system service, likely for persistence.

Modifies systemd

Adds/ modifies systemd service files. Likely to achieve persistence.

Write file to user bin folder