“RATs are software that allow a third party to spy on a computer user from afar, whether rifling through messages and browsing activity, photographing the computer screen, or in many cases hijacking the webcam and taking photographs of whomever is on the other side. RATs are widely used in a variety of contexts, some benign, others not. Across the board, abuse tends to be the rule.
It’s hard to know how many RATs are out there because of their covert nature. Recent reports confirm hundreds of thousands of computers infected in 2014 by only a single type of RAT, with the actual number of infections across years and technology far, far higher….”