High CPU Usage Detected for Unauthorized Process

Detection of an unauthorized process consuming an unusually high amount of CPU resources, which may be part of a malicious attempt to degrade system performance and affect telemetry operations.

STIX Pattern

[process:x_cpu_usage > 'threshold' AND process:image_ref.name != 'authorized_process']

SPARTA TTPs

ID Name Description
EX-0010 Malicious Code Threat actors may rely on other tactics and techniques in order to execute malicious code on the victim spacecraft. This can be done via compromising the supply chain or development environment in some capacity or taking advantage of known commands. However, once malicious code has been uploaded to the victim spacecraft, the threat actor can then trigger the code to run via a specific command or wait for a legitimate user to trigger it accidently. The code itself can do a number of different things to the hosted payload, subsystems, or underlying OS.
EX-0010.03 Rootkit Rootkits are programs that hide the existence of malware by intercepting/hooking and modifying operating system API calls that supply system information. Rootkits or rootkit enabling functionality may reside at the flight software or kernel level in the operating system or lower, to include a hypervisor, Master Boot Record, or System Firmware.