NvCpl.dll worm xp

Anonymous
2011-12-03T00:25:26+00:00

I have a slow running XP machine.  While troubleshooting, I remove all startup items with msconfig by the disable all button and restarted the machine.

Upon a msconfig a checked MvCpl.dll command line was there.  The original on was also there uncheck.  I searched my C-drive for NvCpl.* and received:

   NvCpl     C:\Windows\Help  Help File

  NvCpl.dll  C:\Windows\System32 

  NvCpl       C:\Dell\Drivers\R65699 Help File

  NvCpl.dll   C:\Dell\Drivers\R65699

  NvCpl       C:\Dell\Drivers\R89437   DL_File

  NvCpl        C:\Dell\Drivers\R89437   HL_File

Bounced around on the internet and learned that a rwiz.exe seem to belong to this worm.  It is also in my msconfig startup page.

Any help with removing this Worm would be appreciated.

Avalonfv

Windows for home | Previous Windows versions | Windows update

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Anonymous
2012-01-05T03:06:41+00:00

I just re-read the entire thread. I was struck by two things:

  1. This PC was once on a domain.
  2. This PC had trojans.

I am aware you reconfigured the PC to change it from Domain to Workgroup, but there still might be something in the profile that is searching for something on the domain. I suppose you could create a fresh profile, but I'm not sure I'd waste my time since...

I believe the PC is still compromised. Malware can sometimes be VERY tricky to remove. Sometimes it might APPEAR to be gone, but there will still be a nasty, almost-impossible-to-detect rootkit present (or maybe even a "bootkit" hiding out in the boot sector). The symptoms you describe certainly indicate the presence of malware; the PC might very well be a part of the "botnet" right now.

I recommend that you make sure all the data is backed up and nuke the drive and start from scratch. It's a hassle, but it would probably still be the quickest (and surely be the most effective) way to deal with this mess.

If you had unlimited time and wished to experiment and explore (but I believe you said this PC belongs to a friend), you could search the web for Process Explorer tutorials and start a thread on Bleeping Computer or a similar site to get guided help. But I truly think you'll be better off if you flatten and rebuild.

Good luck and Happy New Year!

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  1. Anonymous
    2011-12-16T13:59:46+00:00

    Daavee,

    Once more, let us know which processes are most active (now that KB940157 had been removed).

    You may have missed in a previous post

    Go back to the Processes tab of Task Manager and sort by CPU cycles in descending order. tell us which processes are the CPU hogs.

    The big ones are:

    cisve.exe This can take >85%

    Exporer.exe This one can take >80%

    MsMpeng.exe This one can take >90%

    searchprotocallhost.exe

    searchfilterhost.exe

    csrss.exe

    Wltry.exe

    Does Safe Mode get rid of the high CPU usage? If so, configure a Clean Boot and systematically add back processes until the problem reappears:

    http://support.microsoft.com/kb/310353

    I going to do a safe mode startup later today.  I have read kb319353

    I have started up in safe mode with networking.  The system is running at 3%. I started firefox.

    I will now try the clean boot process

    Avalonfv

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  2. Anonymous
    2011-12-16T04:12:36+00:00

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  3. Anonymous
    2011-12-16T04:06:36+00:00

    Hmmmm!

    Once more, let us know which processes are most active (now that KB940157 had been removed).

    Does Safe Mode get rid of the high CPU usage? If so, configure a Clean Boot and systematically add back processes until the problem reappears:

    http://support.microsoft.com/kb/310353

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  4. Anonymous
    2011-12-15T22:24:43+00:00

    Daavee,

    That was a good shot.  I used spuninst.exe to uninsttall KB40157.  My problem with >85% cpu power is still being us contantly.

    Can you think of any other update, etc. that I get rid of?  Or maybe not somethings on at a time and see if it makes a difference.  The system is running SP3.

    Avalonfv

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