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  3. VBS.Bootconf.B


Risk Level 1: Very Low

February 10, 2004
February 13, 2007 12:17:15 PM
Trojan Horse
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

VBS.Bootconf.B is a Trojan horse that modifies Internet Explorer settings, redirects Web sites such as Google, Yahoo and MSN to a different search page, and may pop up browser windows to a pornographic Web site.

VBS.Bootconf.B may be installed by another script, which downloads a page containing VBS.Bootconf.B, and saves it as a file named win.hta in the Fonts directory (e.g. %Windir%\Fonts). Symantec antivirus products detect the downloader page as Downloader.Trojan.

Antivirus Protection Dates

  • Initial Rapid Release version February 11, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 11, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 11, 2004
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: Moderate


  • Damage Level: Low


  • 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: Heather Shannon

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