VBS.Saur.A

This worm is written in Visual Basic Script and is spread via Microsoft Outlook. The worm mails itself to everyone in the Outlook address book. It arrives in email as a Batch file (bulbasaur.bat) and creates a VBS and HTML file for further propagation. The worm also attempts to spread itself by IRC via mIRC or Pirch, sending the HTML version of itself to other users via DCC.

Since the virus utilizes Visual Basic Script, you need Windows Scripting Host installed, which is the default under Windows 98 and Windows 2000. Windows Scripting Host is also installed with the latest version of Internet Explorer.