VBS.Gaggle.D

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.

Protection

• Initial Rapid Release version April 6, 2004
• Latest Rapid Release version August 20, 2008 revision 017
• Initial Daily Certified version April 6, 2004
• Latest Daily Certified version August 20, 2008 revision 016
• Initial Weekly Certified release date April 7, 2004

Click here 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: Moderate

Damage

• Damage Level: Medium

Distribution

• Distribution Level: High