Severe threat Level,
High damage capabilities,
Dangers: Causes RPC DCOM BUFFER OVERFLOW, and a Distributed Denial Of
Service attack against windowsupdate.com

THIS VIRUS HAS BEEN UPGRADED FROM CATEGORY 3 TO CATEGORY 4

This virus imports and runs the file msblast.exe.

It then pumps out request to the website www.windowsupdate.com,
causing a "denial of service" attack (chokes the website by
requesting infomation form it multiple times from envery infected
computer)

For more information see:
http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?
VName=WORM_MSBLAST.A or

http://www.symantec.com/avcenter/venc/data/w32.blaster.worm.html