You might try:

http://www.pandasoftware.com/ and run their online scanner (Activescan....left hand side at bottom) They have about two dozen variants of Beastdoor in their database, so they should be a good bet? Unfortunately different AVs handle different threats at any one point in time

Unfortunately this is a RAT (Remote Access Trojan) so you have been "owned". The only safe solution in these circumstances is to reformat and re-install, as you never know what other "goodies" might have been loaded onto your machine?

Remember that if your OS does automatic backup/restore you will have to clear this as well as AVs can't do that. Just follow tha AV provider's instructions.

Good Luck