Category: Viruses and SpywareProtection available since:14 Apr 2004 00:00:00 (GMT)
Type: TrojanLast Updated:19 Jun 2013 09:13:23 (GMT)
Prevalence: Small Number of Reports

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Mac/Amphimix-A is a Macintosh program which is also a properly-formed MP3
file. When the program is launched it displays a dialog box to say
"Yep, this is an application. (So what is your iTunes playing now?)"
It then loads the Amphimix file into the iTunes player as an MP3 file.
The MP3 component of the file contains a track called "Wild Laugh",
a four second burst of manic laughter. Mac/Amphimix-A first appeared as a
proof-of-concept on the internet (even though the concept of Mac programs
under disguise is not a new one), and was widely reported as a "new
form of Mac OS X virus". But it is neither specific to Mac OS X, nor is it
a virus.

; Note that the Mac/Amphimix-A file is harmless without its coresponding
; Macintosh reource fork, which marks the file as executable and designates
; where in the file execution is to start.