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  3. VBS.DLetter@mm


Risk Level 1: Very Low

February 18, 2003
February 13, 2007 11:43:14 AM
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

VBS.DLetter@mm is a worm written in Visual Basic Script. When executed, the worm attempts to send itself to all the recipients in the Microsoft Outlook address book. The email will have a subject which is randomly chosen from a predetermined list and an attachment with a .mht file extension.

VBS.DLetter@mm also spreads using the IRC, mIRC, and KaZaA-shared folders.

Antivirus Protection Dates

  • Initial Rapid Release version February 19, 2003
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version February 19, 2003
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date February 19, 2003
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: High
Writeup By: Jason Pan

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