1. Symantec/
  2. Security Response/
  3. W95.Spaces


Risk Level 2: Low

December 28, 1999
February 13, 2007 11:57:44 AM
Also Known As:
W95.Spaces.1633, W95.Spaces.1245, W95.Spaces.1445, W95/Busm.1445, W95/Busm99.1445
Systems Affected:

W95.Spaces is a dangerous Windows 9x virus. On June 1 of every year, the virus manipulates the Master Boot Record (MBR) of an AT hard disk by using port commands. The virus modifies the MBR data area so that the first partition will point to itself. This prevents the system from booting, if running certain MS-DOS versions that contain a bug and are unable to boot the system correctly.

Antivirus Protection Dates

  • Initial Rapid Release version December 29, 1999
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version December 29, 1999
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date December 29, 1999
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Peter Szor

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