1991 HC (also known as Two Tunes or Three Tunes) was a Hyper Card virus discovered in Holland and Belgium in March 1991.On German language versions of the operating system it would play German folk tunes and display messages such as “Hey, what are you doing? Microsoft accidentally shipped the first ever Word macro virus, Concept, on CD ROM.
From the early 1980s, right up until the present day, here are some of the highlights in the history of Apple Mac malware.
The first virus to affect Apple computers wasn’t written for the Macintosh (that iconic computer wasn’t set to appear until 1984) but is of historic interest none the less.
OSX/Leap-A was programmed to use the i Chat instant messaging system to spread itself to other users.
As such, it was comparable to an email or instant messaging worm on the Windows platform.
Rich Skrenta, by the way, went on to found the web companies Topix and Blekko.
Clearly his early entanglement with malware-writing didn’t make him a completely bad apple.
In the future, Mac-specific malware would have to be written with a new OS in mind..
The Renepo script worm (also known as “Opener”) attempted to disable Mac OS X security including the Mac OS X firewall.
Furthermore, most people at the time considered documents to be non-dangerous, and were happy to receive them without thinking of the possible security implications. DOC file could infect your computer, because the macro virus’s code was embedded within.