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  3. OSX.Flashback


Risk Level 1: Very Low

September 30, 2011
April 6, 2012 3:47:44 PM
Systems Affected:
Mac OS X
OSX.Flashback is a Trojan horse that gathers information from the compromised computer.

Antivirus Protection Dates

  • Initial Rapid Release version September 30, 2011 revision 018
  • Latest Rapid Release version February 19, 2013 revision 016
  • Initial Daily Certified version September 30, 2011 revision 021
  • Latest Daily Certified version December 10, 2012 revision 003
  • Initial Weekly Certified release date October 5, 2011
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
  • Releases Confidential Info: Gathers information from the 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: Kevin Savage, Karthik Selvaraj and Branko Spasojevic

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