Yes, they do exist. UNIX virii. Source code and live virii included.
abef5415fec52c4b7145d0862e7e0af3Same as above, but winzipped.
d83c86e061a2aa338485b7b4449cf749VDAT v1.7 - VDAT: the virus scene database. This is the ultimate database/ezine/publication about the underground virus scene - Editorials, Interviews, Essays, Tutorials, Virus Engines & Tools, Virus Creation Tools, Virus Collection and Research Utilities, Virus Groups, Zines, and much, much more.
d01c33fe90ebef8f52eace1ef1d1a83b