A reverse TCP is a connection that starts from the victim back to the attacker, which in fact opens the 'door' for the attacker to hack the target system.
This connection is being triggered normally by a malware that contains the attacker address or some other address, and when the victim starts that malware, it initializes a road for the attacker to enter.
My question is how the attacker spoofs his address and protect himself from being tracked. Are there some sites that provide any kind of back-end terminal to be used by the attacker, or are there other ways?