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  3. OSX.Leap.A


Risk Level 1: Very Low

February 16, 2006
February 13, 2007 12:51:24 PM
Also Known As:
CME-4, OSX/Leap.A [Computer Associate, Leap.A [F-Secure], IM-Worm.OSX.Leap.a [Kaspersky , OSX/Leap [McAfee], OSX/Leap-A [Sophos], OSX_LEAP.A [Trend Micro]
Systems Affected:
Macintosh, Macintosh OS X

OSX.Leap.A is a worm that targets installs of Macintosh OS X and spreads via iChat Instant Messenger program.

Note: It infects files on the Macintosh OS X version 10.4. The worm will execute on Intel Macs, but cannot spread to other systems from these machines.

Antivirus Protection Dates

  • Initial Rapid Release version February 16, 2006
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version October 31, 2007 revision 003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 22, 2006
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: Low
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Costin Ionescu

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