This article is from the Viruses and the Mac FAQ, by David Harley D.Harley@icrf.icnet.uk with numerous contributions by others.
There are excellent pages on HyperCard viruses at HyperActive
Software. There is information on HyperCard infectors, a link to
Bill Swagerty's free Vaccine utility for detecting and cleaning
them, a note on false positives reported by commercial software,
inoculation, and a free HyperCard virus detection service.
The CIAC virus database includes entries for PC, Macintosh, and a
number of other platforms. The Macintosh section also includes a
number of joke programs and one or two apparent hoaxes.
Virus Test Center, Hamburg: AntiVirus Catalog/CARObase early work
These links may be out-of-date: if they don't work, try
Last we checked [03-Sep-97], these sites probably need updating,
though some older files do have historical value. Info-Mac mirrors
have Macintosh information, but includes some outdated virus
information and software at this writing; still, always worth a
Also of interest, again sometimes outdated:
Kevin Harris's Virus Reference was last updated 31-Aug-95. This
HyperCard stack requires HyperCard 2.1 or later.