File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

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 sudoers policy

Writes to /etc/sudoers or a drop-in config, potentially granting passwordless root access to a user or process.

OS Credential Dumping

Adversaries may attempt to dump credentials to use it in password cracking.

Abuse Elevation Control Mechanism: Sudo and Sudo Caching

Abuse sudo or cached sudo credentials to execute code.

Adds a system user to a privileged group

Adds a system user to the root or sudoers group to elevate privileges.

Adds a user to the system

Contacts third-party web service commonly abused for C2

Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

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 rc script

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

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