Threat Description



Aliases: Net-Worm:​W32/Lovsan.F
Category: Malware
Type: Net-Worm
Platform: W32


A type of worm that replicates by sending complete, independent copies of itself over a network.


Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

Eliminating a Local Network Outbreak

If the infection is in a local network, please follow the instructions on this webpage:

Technical Details

The new F variant of Net-Worm:W32/Lovsan was found on September 1st, 2003. According to news reports, the author of this worm was caught in Romania on 3rd of September, 2003.

This variant is functionally identical to Lovsan.A, with a few minor differences:

  • It uses the file name enbiei.exe instead of MSBLAST.EXE.
  • It uses a different MUTEX name: 'muuie'
  • The Distributed Denial of Service (DDoS) attack target has been changed to '' which does not resolve so the attack will not be effective. The address '' contains the website of the Technical University of Iasi, Romania
  • The registry value used has been changed to:
    • 'HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\'

It has a different hidden message in Romanian:

 Nu datzi la fuckultatea de Hidrotehnica!    !!Pierdetzi timp ul degeaba...Birsan te cheama pensia!!!   Ma pis pe diploma!!!!!!.    

Which translates to English as:

Don't go to the Hydrotechnics faculty!!!   You are wasting time...Barsan, the retirement wants you!!!     F*** the diploma!!!!!!        

(English translation is courtesy of Costin Raiu of Kaspersky Labs.)


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