Summary
On February 20th, this variant of VBS/VBSWG has been found from the field. This variant is not encrypted.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
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
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