Has anybody else come across this sql injector, written by Zwell. The general consensus is that it although it works, there is a backdoor on the program. And when you scan it, it detects an IRC bot. Although according to a mailing list (can't remember which one) some posters said they checked everyhting out and it didnt modify their computer or communicate with an outside server( although it could just be the author saying this...) Anyway, here's the link if you want to check it out, and anyone else that has heard of it before, do you know where to get source code?
the original link doesnt seem to be working here's it uploaded here.
http://www.megaupload.com/?d=0UNAK1K4

WARNING MAY (OR MAY NOT?) CONTAIN A BACKDOOR