Loveletter:

Infection:
The virus spreads via Email. The infection mail has the appearance:

This Email will be transfered to all adresses in the outlook adressbook, if you execute the attachment.

Payload:
The virus causes several damage on your system:

• The attachment is a visual basic script ans changes registry entries for the Kernel32 (it overwrites the WIN32.DLL, which is executed at every boot routine)
• The worm changes all files on your PC, which have the endingVBS, VBE, JS, JSE, CSS, WSH, SCT, HTA, JPG, JPEG, MP3 or MP2. 
  It integrates files in the windows directories:
  
  • MSKERNEL32.VBS in Windows\ System directory
  • WIN32DLL.VBS in Windows directory
  • LOVE-LETTER-FOR-YOU.TXT.vbs in Windows\ System directory
  • WINFAT32.EXE in Windows\Downloaded Program Files directory
  • WIN-BUGSFIX.EXE in Windows\Downloaded Program Files directory
  • script.ini in mIRC directory
    
• It changes the starting page of the browser for a download of a file named WIN-BUGFIX.EXE. This file was now removed from the net.
• The Outlook-adressbook will be searched for Email adresses and an infectionmail will be sent to every found adress

Warning:
In great companie networks everyone has the same global adress book, so the Exchange-server will send so many Emails, that he will not work anyway.

Protection:
Outlook user are very endangered. Achieving an infectionmail this should be deleted at once. Don't open it! In the browser options the  Active Scripting should be deactivated after getting an infection mail. After this the mail can be marked and deleted without any damage.
The mail should neither be opened nor the attachment should be double clicked. Many Anti-virus programs have updates in the net:

• F-Secure: 
• Symantec 
• Nai:
• Kaspersky Labs
• Sophos
• Computer Associates
• H+BEDV
• G Data:
• Trend Micro:
• myCIO.com

Remarks:
The worm comes from asia and has infected many companies on Thursday, the 27th of April 2000. On the 4th of may it reached europe and infects the networks a Microsoft, ZDF or Siemens for example.