uses AES to encrypt network traffic. The key can be hardcoded or negotiated with the C2 server in the registration phase. 
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: uses AES to encrypt network traffic. The key can be hardcoded or negotiated with the C2 server in the registration phase.  ### Response: T1573.001.