has been known to reach a command and control server via one of nine proxy IP addresses. (Citation: Bitdefender Trickbot C2 infra Nov 2020) 
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 been known to reach a command and control server via one of nine proxy IP addresses. (Citation: Bitdefender Trickbot C2 infra Nov 2020)  ### Response: T1090.002.