Hallo

A Remote Administration Tool is a special kind of hacker malware, used
for remote access and control of other people's PCs. 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, remove
files and even crash your computer. The pest originated in Germany. It
was written in Visual Basic applicationming language. The origination date
is August 1999.