replaced the background wallpaper of systems with a threatening image after rendering the system unbootable with a .
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: replaced the background wallpaper of systems with a threatening image after rendering the system unbootable with a . ### Response: T1491.001.