Threat description




This worm is able of spreading through e-mail sending messages with different content. It has, as well, capability to spread through Kazaa's P2P network.


Automatic action

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

More scanning & removal options

More information on the 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

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

Technical Details

The worm has three components, it was written in Visual Basic and packed with UPX. The first component if the one responsible for the installation into the system, it's an UPX file of length 9266 (24626 unpacked). The second component contains the main set of functionalities of the worm, the e-mail sending code. The third component is an UPX packed copy of the SMTP Control for Visual Basic. Which the worm will use to send the e-mail.

Installation to system

It will drop its components into the default temporary folder as:

explore.exe (main component)
a.exe (installation component)
smtp.ocx (SMTP Control for Visual Basic)

All of the components will also be copied to the System32 windows folder. And will copy the installation component with the additional names:

P2P spreading

This worm will also read from the Windows registry the location of the Kazaa downloads folder and copy itself to that location.

Mass mailing

It will extract e-mail addresses from files in the users' computer which have one of the following extensions:


The messages sent by the worm will have the following characteristics:

Subjects are chosen from:

Check this out ;)",
This is all i can send
Have Fun :)
You gonna love it
Here is what u wanted
Wait for more :)
Take a look
Never mind !
See the attatched file", )
gift :)
save it for hard times
Happy Times :)
Very funny
Try it
you have to see this!

To which "Fw:" or "Re:" can be prepended.


Internet Explorer start page is set to:


Detection in F-Secure Anti-Virus was published on October 15th, 2003 in update:

Detection Type: PC

Database: 2003-10-15_02

Submit a Sample

Suspect a file or URL was wrongly detected? Send it to our Labs for further analysis

Submit a Sample

Give And Get Advice

Give advice. Get advice. Share the knowledge on our free discussion forum.

More Info