Definition:
Remote Access Trojans (aka Remote Administration Tool or RAT), provide a "backdoor" into the system through which an unscrupulous hacker can remotely control your system - even running other malicious code if s/he chooses. They can even use these hijacked systems, called zombies, to launch attacks on others. Some examples of RATs include Sysbug, Back Orifice, and Lamer's Death. For more information on RATs, see: Haunting Thought: Is Your PC a Zombie?.
Also Known As: RAT, backdoor