They may also be used as a component of malware to establish a reverse connection or back-connect to a service or adversary controlled system.
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: They may also be used as a component of malware to establish a reverse connection or back-connect to a service or adversary controlled system. ### Response: T1219.