Virus Bound with WotLK 3.3.5 torrent?

Hello all, just started downloading the WotLK 3.3.5 torrent from warmane (magnet link). When I started the torrent, Windows Defender said that it had detected a win32/sality.at virus. Is this normal? I see it's 18GB, but I think someone could have changed the magnet link to point to a malicious download.

Specifically, it says that the executable "WowError.exe" in the root directory is the culprit.

Interestingly, my friend downloaded this game about a week ago and he sent me his WowError.exe. When I downloaded his version and I scanned it, no threats were detected. Might want to investigate this! (MD5 sum?)

I can not say why that happend but if you do not trust that torrent you can use those direct download links: http://forum.warmane.com/showthread.php?t=280398