Threat description


Category: Malware
Type: Worm
Platform: VBS
Aliases: VBSWG.V@mm


This variant spreads in messages with following content:

  Subject:    Check out this preteen pic!!     Body:       Hey here is a great preteen pic. She is 12 years old totally bald..     Attachment: Cindy12yr.vbs   


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.


More information on scanning and removal options available in your F-Secure product can be found in the Help Center.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

When the attached file is executed, the worm will mail itself to the each recipient in every address book. After mass mailing the following key is added to the registry:


This variant also replicates using mIRC and Pirch IRC clients. It replaces the "script.ini" from mIRC and "events.ini" from Pirch installation directories, causing that the worm will send itself to the IRC user that joins the channel where an infected user is.

VBSWG.V also goes trough all local and network drivers from the system, and replaces every file with either ".vbs" or ".vbe" extension with itself. It also attempts to locate mIRC and Pirch installations from these drives.

This variant shows the following message box upon execution:

  Error Decompressing JPEG Picture   

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

Description Details: Analysis: Katrin Tocheva and Sami Rautiainen, F-Secure; March 2001


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