File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

Cryptocurrency Miner

Makes network request to known mining pool URL.

Deletes system logs

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

Disables AppArmor Mandatory Access Control

Stops or disables AppArmor via systemctl, removing mandatory access control restrictions on process capabilities and file access.

Executes dropped EXE

Flushes firewall rules

Flushes/ disables firewall rules inside the Linux kernel.

Loads a kernel module

Loads a Linux kernel module, potentially to achieve persistence

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.

Abuse Elevation Control Mechanism: Sudo and Sudo Caching

Abuse sudo or cached sudo credentials to execute code.

Checks hardware identifiers (DMI)

Checks DMI information which indicate if the system is a virtual machine.

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.

Disables SELinux

Disables SELinux security module.

Enumerates running processes

Discovers information about currently running processes on the system

Modifies systemd

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

Reads hardware information

Accesses system info like serial numbers, manufacturer names etc.

Removes the immutable protection flag from a file

Uses chattr to remove the immutable flag from a file, allowing previously write-protected files to be modified or deleted.

Write file to user bin folder

Writes file to system bin folder