Risk Level 1: Very Low

February 13, 2007 11:55:54 AM

CDEF is a virus discovered in Ithaca, New York, in August 1990. In February 1993, a mutant strain of CDEF was discovered in New York. The mutation varied so slightly that even a variant name was considered unnecessary. CDEF is not designed to be malicious but can cause problems nonetheless. Because it infects only Desktop files (invisible files used by the Finder), CDEF spreads from disk to disk very quickly.

System 7 is immune to the CDEF virus, as it is to most desktop viruses. Even though CDEF can attach itself to the desktop file, it does not do any damage to the system. It can, however, spread to non-System 7 hard disks.

Antivirus Protection Dates

  • Initial Rapid Release version December 20, 2000
  • Latest Rapid Release version August 20, 2008 revision 017
  • Initial Daily Certified version December 20, 2000
  • Latest Daily Certified version August 20, 2008 revision 016
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

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2016 Internet Security Threat Report, Volume 21
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