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.

Modifies the /etc/hosts DNS resolution file

Modifying the /etc/hosts name-resolution file changes IP routing, which can facilitate traffic hijacking or the blocking of (security update) endpoints.

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

Modifies rc script

Adding/modifying system rc scripts is a common persistence mechanism.

Modifies systemd

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

Reads list of loaded kernel modules

Reads the list of currently loaded kernel modules, possibly to detect virtual environments.

Reads process memory

Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.