Article · Wikipedia archive · Last revised Jun 11, 2026

MP3Concept

MP3Concept is the first trojan horse for Mac OS X, created around April 2004. MP3Concept is benign, it was designed as a proof of concept regarding how a file can be disguised to an end user in a GUI environment on Mac OS X. It is an application bundle that looks like an MP3 file. When launched, it plays a clip of a man laughing. Since its creation Apple has added additional verifications to the Finder to prevent such an attack. Antivirus software also now looks for its characteristics as well.

Last revised
Jun 11, 2026
Read time
≈ 1 min
Length
119 w
Citations
—
Source
Wikipedia ↗
MP3Concept
Malware details
AliasesMAC.Amphimix, MP3Virus.Gen [Intego], MAC_MP3CONCEPT.A [Trend]
ClassificationTrojan horse (benign)

MP3Concept is the first trojan horse for Mac OS X, created around April 2004. MP3Concept is benign, it was designed as a proof of concept regarding how a file can be disguised to an end user in a GUI environment on Mac OS X. It is an application bundle that looks like an MP3 file. When launched, it plays a clip of a man laughing. Since its creation Apple has added additional verifications to the Finder to prevent such an attack. Antivirus software also now looks for its characteristics as well.

External links