Excerpt from today's Macintouch:

http://www.intego.com/news/pr40.html

Intego reports a nasty Trojan horse that runs on Mac OS X:

Intego, the Macintosh security specialist, has just released updated
virus definitions for Intego VirusBarrier to protect Mac users against
the first Trojan horse that affects Mac OS X. This Trojan horse,
MP3Concept (MP3Virus.Gen), exploits a weakness in Mac OS X where
applications can appear to be other types of files.
* The Trojan horse's code is encapsulated in the ID3 tag of an MP3
(digital music) file. This code is in reality a hidden application that
can run on any Macintosh computer running Mac OS X.

--
ha