Threat description


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


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.


Automatic action

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

More scanning & removal options

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 further assistance.

Eliminating a Local Network Outbreak

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

Technical Details

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.)


Suspect a file or URL was wrongly detected? Submit a sample to our Labs for analysis

Submit Now

Give And Get Advice

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

Learn More