used HTTP for C2 communications.  also used an HTTP malware variant to communicate over HTTP for C2.(Citation: FireEye APT19)
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: used HTTP for C2 communications.  also used an HTTP malware variant to communicate over HTTP for C2.(Citation: FireEye APT19) ### Response: T1071.001.