File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

Deletes Audit logs

Deletes logs related to the Linux Audit framework.

Deletes journal logs

Deletes systemd journal logs. Likely to evade detection.

Executes dropped EXE

Flushes firewall rules

Flushes/ disables firewall rules inside the Linux kernel.

Modifies Watchdog functionality

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

Unexpected DNS network traffic destination

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

Abuse Elevation Control Mechanism: Sudo and Sudo Caching

Abuse sudo or cached sudo credentials to execute code.

Checks mountinfo of local process

Checks mountinfo of running processes which indicate if it is running in chroot jail.

Creates/modifies Cron job

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

Deletes log files

Deletes log files on the system.

Enumerates active TCP sockets

Gets active TCP sockets from /proc virtual filesystem.

Enumerates running processes

Discovers information about currently running processes on the system