Remote Access Trojans can be very challenging because they mimic legitimate commercial remote administration tools, open legitimate network ports, and perform very surgical operations that dont resemble typical malware techniques. The Carbanak malware RAT, which infected banks globally, stole funds, and wreaked financial havoc estimated at up to $1 billion in losses. To deal with these low-down, filthy, social-engineering, vulnerability-crawling varmints, youll need to learn their aliases, profile their capabilities, and uncover how to block, starve, and blind them.”]
Source: https://www.csoonline.com/article/2955972/how-to-kill-remote-access-trojans.html