A Remote Administration Tool is a special kind of hacker spyware, used for remote access and control of other people's computers. The attacker infects the PC via the e-mail or File and Print Sharing. A "server" allows him to connect via a "client" on his own machine. The functions of a RAT may vary, depending on the needs of the hacker. Some RATs can't really harm your PC and the only purpose they were made for is hooliganism. But some versions can steal vital information, delete files and even crash your system. This RAT includes a file manager. It allows the intruder to upload/download any file in the infected PC. The author of this pest is a hacker called Carl-Fredrik Neikter. The programming language is Delphi. This virus originated in November 2001.