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VBSWG.N@mm

Classification

Category: Malware

Type: Worm

Aliases: VBSWG.N@mm

Summary


On February 20th, this variant of VBS/VBSWG has been found from the field. This variant is not encrypted.

Removal


Automatic action

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

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Technical Details


It spreads in messages with the following content:

  Subject:    Fw: FYI    Body:       ---------- Forwarded message ----------       Date: Thu, 15 Feb 2001 16:21:42 -0800     From: Mohammed Baget      To: Eugene Spafford      Cc: Mark Sawyer     Subject: Fw: New bud commercial!  Spaf,    Here's the new budweiser commercial as promised..    - mb     Mohammed Baget     Head of Communications     Budweiser USA   Attachment: budweiser-commercial-spring2001.mpeg.vbs   

The attachent size about 3.2MB. When it is executed, the worm alters the Internet Explorer start page to point to an adult site. It also modifies the registry in such way that the worm will be executed every time when the system is restarted.

Next the worm sends itself to all recipients in every address book and adds a key to the registry:

Subject:

Fw: FYI

Body: ---------- Forwarded message ---------- Date: Thu, 15 Feb 2001 16:21:42 -0800

 From: Mohammed BagetTo: Eugene SpaffordCc: Mark Sawyer

 Subject: Fw: New bud commercial!
Spaf,

Here's the new budweiser commercial as promised..

- mb

 Mohammed Baget

 Head of Communications

 Budweiser USA
 Attachment: budweiser-commercial-spring2001.mpeg.vbs
 

This registry key is used as a marker, so the mass mailing will be done only once.

Information about the original VBS/Onthefly.A (also known as I-Worm.Lee.o and VBS/VBSWG) is available at: https://www.F-Secure.com/v-descs/onthefly.shtml