[comp.sys.apple] viruses in BASIC

TMPLee@DOCKMASTER.DCA.MIL (03/18/89)

I had even thought about a self-modifying BASIC program!  If you look at
the book from Abacus on viruses ("Hi-Tech Crimes" or something like that
is in its title) there even are examples of BASIC viruses.  My point is
that with reads and writes (PRINT D$ ...)  embedded in a fairly complex
program that "computes" what it is reading and writing in string
variables you could end up with a BASIC program that is not at all easy
to understand; I have seen plenty of "ordinary" BASIC programs wirtten
with cryptic variable names, no comments, and no clear structure that it
would take a lot of work to understand well enough to convince oneself
they were clean.