Hi guys, I'm sure a lot of you were hit by this worm like i was! There is a patch to stop the shutdown but MSBlast is in fact a worm. It has pretty much a stupid purpose, to launch a DoS attack on Microsoft Windows Update! So firstly, lets get the patch to stop the annoying dialogue that pops up and then we'll gte rid of the actual file itself.
Get the patch from
http://microsoft.com/technet/treeview/default.asp?url=/technet/security/bulletin/MS03-026.asp
Then on your computer hit CTRL, ALT and DELETE and find MSBlast.exe in the running processes (under processes tab in Windows XP). End the process then go to your windows folder and to system32. If system32 is not seen, then it must be hidden so just type c:\windows\system32 in the address bar. Delete the msblast.exe file. Now the actual file itself is gone but, it was set to boot with your computer so next time you boot your computer, you would get a message saying that it cant find the file. But you can remove it from startup easily by clicking start - run and type msconfig. Click the startup tab and uncheck it. Now it wont be set to boot with the computer but it wont disappear from the list on its own so if you're like me and dont even like having it in the list, do the following instead!
Click start - run and type regedit. Now navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run and remove the string with the value msblast.exe. It should be called Windows Update or something similar!
Now hit the f5 key to refresh your registry. Close it and I recommend a reboot! Then when you reboot, go to
http://www.windowsupdate.com and download any security updates for your OS. The reason for that is because if you (or I) had been getting the updates in the first place, we wouldnt have been effected by this worm at all! The worm itself is exploiting a Windows RPC Vulnerability discovered in most Micrsoft OS's.
So I hope you enjoy getting rid of that annoyance