1. Symantec/
  2. Security Response/
  3. VBS.Bulbas.B@mm


June 9, 2001
February 13, 2007 11:44:01 AM
Also Known As:
Systems Affected:

VBS.Bulbas.B@mm is a Visual Basic (VB) Script, mass-mailing worm that uses Microsoft Outlook to send itself to all the contacts in the Outlook Address Book. The email has the following characteristics:

Subject: Rv: New Stuff 4You!

Attachment: Natas.bat

The Natas.bat attachment creates two other files, Natas.vbs and Natas.html, which the worm uses to infect the computer and spread.

NOTE: Definitions dated prior to March 11, 2003 may detect this threat as VBS.Bulbas.B or Bloodhound.VBS.Worm.

Antivirus Protection Dates

  • Initial Rapid Release version June 11, 2001
  • Latest Rapid Release version August 8, 2016 revision 023
  • Initial Daily Certified version June 11, 2001
  • Latest Daily Certified version August 9, 2016 revision 001
  • Initial Weekly Certified release date June 11, 2001
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Scott Gettis

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