Question

PatchedSFC Virus

Asked by: mbelletty

I have a clients server which runs Small business Server 2003.  It also has McAfee a/V on it, which is coming up saying that the PC is infected with the virus PatchedSFC in file C:\windows\system32\sfc_os.dll
This is turning the print spooler service off all the time and they can not print on the already installed printers.  I have tried Malwarebytes but it does not find the virus and McAfee finds it but will not delete it.

Has anyone else experienced this?

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Asked On
2009-10-20 at 04:11:44ID24826399
Topics

SBS Small Business Server

,

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Answers

 

by: mbellettyPosted on 2009-10-22 at 02:27:21ID: 25632148

I have attached a screenshot of the McAfeee virus detection screen that comes up.  This virus is stopping the SBS server from running its print spooler as well as not allowed USB external drivers to be shown.

Any help please would be appreciated on how to remove this.
Does anyone know of sfc_os.dll file.  I dont think I can simply delete it?

 

by: David-HowardPosted on 2009-10-22 at 08:09:04ID: 25635114

McAfee states that with updated DAT files, their suite should remove the threat. That said, have you tried running your scans in Safe Mode? If not, you might give that a try.
You might also need to disable system restore and then run your scans.
Directions can be found here:
http://support.microsoft.com/kb/310405

 

by: mbellettyPosted on 2009-10-22 at 16:25:18ID: 25640066

Would the system restore directions be the same for Small Business Server.  That is what is running on the machine that is infected.
I had tried the virus definition update.  McAfee finds it but does is not able to clean or delete the file.  I will try it again though

 

by: optomaPosted on 2009-11-07 at 16:07:17ID: 25768745

http://www.surfright.nl/en/hitmanpro (you can uninstall it after a restart)

 

by: rpggamergirlPosted on 2009-11-08 at 04:20:39ID: 25770256

I wouldn't turn Off System Restore....there's nothing to gain turning it off while the system is infected, unless of course your only problem is virus located in System Restore which is not the case here.

Virut usually infects sfc_os.dll so it's possible that virut is present in the system and possible that other protected files are also infected(hopefully it's not the case).

Since sfc_os.dll is patched I assume Windows File Protection is already disabled.. or maybe not since McAfee still can't delete the patched file.

Have you tried just replacing sfc_os.dll with a clean copy?

20120131-EE-VQP-002

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