File and Directory Permissions Modification

Adversaries may modify file or directory permissions to evade defenses.

Executes dropped EXE

OS Credential Dumping

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

Checks system information (zLinux)

Check system information on IBM zSystems 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.

Creates/modifies environment variables

Creating/modifying environment variables is a common persistence mechanism.

Deletes log files

Deletes log files on the system.

Enumerates running processes

Discovers information about currently running processes on the system

Looks up external IP address via web service

Uses a legitimate IP lookup service to find the infected system's external IP.

Modifies init.d

Adds/modifies system service, likely for persistence.

Modifies rc script

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

Modifies systemd

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

Write file to user bin folder

Writes file to system bin folder

Modifies Bash startup script

Reads process memory

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

UPX packed file

Detects executables packed with UPX/modified UPX open source packer.