StalkerX is a virus constructor that generates simple NewEXE (Windows) viruses. The viruses are named after the text that is included in the distribution package:
Create your own Windows
virus! This is a EASY
to use Windows Virus
creation kit.
Written By Stalker X
These viruses search for NewEXE files, and write themselves to the end of the file. Depending on their "generation" these viruses fill the screen with random data.