used other victims as proxies to relay command traffic for instance using a compromised Georgian military email server as a hop point to NATO victims. The group has also used a tool that acts as a proxy to allow C2 even if the victim is behind a router.  has also used a machine to relay and obscure communications between  and their server.(Citation: FireEye APT28)(Citation: Bitdefender APT28 Dec 2015)
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 other victims as proxies to relay command traffic for instance using a compromised Georgian military email server as a hop point to NATO victims. The group has also used a tool that acts as a proxy to allow C2 even if the victim is behind a router.  has also used a machine to relay and obscure communications between  and their server.(Citation: FireEye APT28)(Citation: Bitdefender APT28 Dec 2015) ### Response: T1090.002.