you mean virus files?
I tend to read the comments before I download the file because there is usually a 15-year old on there alerting us in caps "OMGZ IT'S A VIRUS LOL"
Other than that, you can try newsgroups. NBpro i use and then i joined alt.binaries.cd.image or alt.binaries.divx or alt.binaries.svcd or alt.binaries.dvd.