[Isaac]

Here you go mate, I used this tool a few years ago. It's pretty old but it works : http://www.f2ko.de/programs.php?pid=b2e
It also has a bunch of extra features too like encryption, version information editor, icon selection etc. Give it a try.

Although, Batch files aren't exactly what I'd call "harmful viruses" (or viruses in general) I honestly think that these useless batch scripts from 1998 that people refer to as "Viruses" should just die out already.