Threat Description

Net-Worm: W32/Lovsan.E


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


The new E variant of Net-Worm:W32/Lovsan was found on August 29th, 2003.


Automatic action

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

Manual Disinfection

Caution: Manual disinfection is a risky process; it is recommended only for advanced users.

For full 8-step list of how to get rid of Lovsan, please see Net-Worm:W32/Lovsan

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

Contact Support

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

You may also refer to the Knowledge Base on the F-Secure Community site for more assistance.

Network Disinfection

For general instructions on disinfecting a local network infection, please see Eliminating A Local Network Outbreak.

Technical Details

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

  • It uses the file name mslaugh.exe instead of MSBLAST.EXE.
  • It uses a different MUTEX name: 'SILLY'
  • The Distributed Denial of Service (DDoS) target has been changed to, which already points to, effectively causing the infected hosts to attack themselves
  • The used registry value has been changed to: 'HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Automation'
  • It has a different hidden message: 'I dedicate this particular strain to me ANG3L - hope yer enj oying yerself and dont forget the promise for me B/DAY !!!!'


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