Need fresh copy of rundll32.exe file

[Ronald]

My PC is infected with the Backdoor.Lastdoor Trojan Horse
virus. Norton indicates that I should delete the file
and reinstall it. They also say delete a value from a
registry key.

I called Dell, who is my support provider asking how to
acquire a clean copy of rundll32.exe. I thought it could
be obtained from an XP CD, but Dell claims I will have to
wipe out my computer completely and reinstall XP all over
again.

Is this really necessary? My computer works fine right
now, at least as far as I can see. The infected file is
still in the quarantine.

Please let me know if there is any way to fix this
problem without having to reinstall XP.

Thanks!

 

[gf]

No, it's not necessary, but are you certain that you need THIS file
restored.

Some virii actually use a file by that name because it looks like a windows
file, but it is in another place then where Windows puts it.

Before you do anything, search for this file in C:\Windows\system32...if
it's there, you don't need a fresh copy (Norton killed the duplicate-named
virus file, but not the WINDOWS file)

If it is not there (make sure you can see system and hidden files), type the
following at a command line (assuming d: is your cd-rom drive)

expand d:\i386\rundll32.ex_ C:\Windows\system32\rundll32.exe

 

[Guest]

It appears this Trojan actually overwrites the Rundll32.exe
http://securityresponse.symantec.com/avcenter/venc/data/backdoor.lastdoor.html

 

[gf]

Ah well, expand away

It appears this Trojan actually overwrites the Rundll32.exe
http://securityresponse.symantec.com/avcenter/venc/data/backdoor.lastdoor.html