Written in Visual Basic

Released in May 2008

Server
Dropped File:
c:\WINDOWS\system32\BLK.exe
Size: 90,226 bytes 

Startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "Microsoft Windows XP Update"
Data: C:\WINDOWS\System32\BLK.exe 



Tested on Windows XP
September 24, 2008