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  3. OSX.Iservice.B


Risk Level 1: Very Low

January 27, 2009
January 27, 2009 7:51:16 PM
Also Known As:
OSX/iWorkS-B [Sophos], OSX/IWService.b [McAfee], Backdoor.OSX.iWorm.c [Kaspersky]
Infection Length:
413,604 bytes
OSX.Iservice.B is a Trojan horse that runs on Mac OS X and opens a back door on the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version pending
  • Latest Rapid Release version January 27, 2009 revision 024
  • Initial Daily Certified version January 27, 2009 revision 025
  • Latest Daily Certified version January 27, 2009 revision 025
  • Initial Weekly Certified release date January 28, 2009
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: Medium
  • Payload: Opens a back door on the compromised computer.


  • 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: Mario Ballano Barcena

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