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.
Disinfection & Removal
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:
a.bat a.com a.pif a.scr
This worm will also read from the Windows registry the location of the Kazaa downloads folder and copy itself to that location.
It will extract e-mail addresses from files in the users' computer which have one of the following extensions:
.htm .html .eml .txt
The messages sent by the worm will have the following characteristics:
Subjects are chosen from:
Check this out ;)", <>) Enjoy! This is all i can send Have Fun :) You gonna love it Here is what u wanted ;) Wait for more :) looool Take a look Never mind ! Attatchments See the attatched file", <>) gift :) Surprise! save it for hard times Happy Times :) Useful Very funny Try it you have to see this! emazing!
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
Detection Type: PC
Description Created: Ero Carrera, October 31st, 2003
Technical Details: Ero Carrera, October 31st, 2003