In both Carbanak and FIN7 attacks, communication with users’ compromised systems is done through bypassing firewalls or network detection systems via commonly used ports, using connection proxies to avoid direct connections to the threat group’s infrastructure, employing the command-and-control channel to remotely copy files from an external system, blending in with existing network traffic by using standard application layer protocol, and taking advantage of standard cryptographic protocol to disguise command-and-control traffic.