has used IMAP POP3 and SMTP for a communication channel in various implants including using self-registered Google Mail accounts and later compromised email servers of its victims.(Citation: FireEye APT28)
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: has used IMAP POP3 and SMTP for a communication channel in various implants including using self-registered Google Mail accounts and later compromised email servers of its victims.(Citation: FireEye APT28) ### Response: T1071.003.