Detection of an unexpected modification to the stored commands table or area in memory. This could indicate an unauthorized update that modifies the table to perform time-based attack like initiate a system shutdown or denial of service at a time in the future.
| ID | Name | Description | |
| EX-0008 | Time Synchronized Execution | Threat actors may develop payloads or insert malicious logic to be executed at a specific time. | |
| EX-0008.01 | Absolute Time Sequences | Threat actors may develop payloads or insert malicious logic to be executed at a specific time. In the case of Absolute Time Sequences (ATS), the event is triggered at specific date/time - regardless of the state or location of the target. | |
| EX-0008.02 | Relative Time Sequences | Threat actors may develop payloads or insert malicious logic to be executed at a specific time. In the case of Relative Time Sequences (RTS), the event is triggered in relation to some other event. For example, a specific amount of time after boot. | |
| 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. | |