W95.Spaces

Risk Level 2: Low

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Discovered:: December 28, 1999
Updated:: 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
Type:: Virus
Systems Affected:: Windows 95, Windows 98, Windows Me

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 for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

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

Damage

Damage Level: High

Distribution

Distribution Level: Low

Writeup By: Peter Szor

Technical Details

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Internet Security Threat Report, Volume 16