1. Symantec/
  2. Security Response/
  3. VBS.Gaggle.D


Risk Level 1: Very Low

April 6, 2004
February 13, 2007 12:21:03 PM
Also Known As:
I-Worm.Gedza [Kaspersky], VBS/Gedza.A [F-Prot]
Systems Affected:

VBS.Gaggle.D is a mass-mailing worm that overwrites several files. This worm can infect the following files:
  • .vbs
  • .vbe
  • .js
  • .jse
  • .hta
  • .htm
  • .html
  • .php
  • .shtm
  • .shtml
  • .phtm
  • .phtml
  • .mht
  • .mhtml
  • .plg
  • .htx

The worm retrieves email addresses from the files that have .hta, .htm, .html, .php, .shtm, .shtml, .phtm, .phtml, .mht, .mhtml, .plg, or .htx extensions. Then, it uses its own SMTP engine to send its archive to all the email addresses that it finds. The worm can also spread through mIRC, ICQ, and some file-sharing networks.

The From field of the email is spoofed, the subject line and message vary, and the attachment is Filezip.zip.

When the worm runs, it may display a picture of the (singer) Avril Lavigne.

Antivirus Protection Dates

  • Initial Rapid Release version April 6, 2004
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version April 6, 2004
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date April 7, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Fergal Ladley, Yana Liu

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