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Unable to access the internet after virus removal


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#1 smasher12

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Posted 27 December 2011 - 05:26 PM

Hi, I'm hoping you guys may be able to help me. I'm having the same problem as the person in this thread. http://www.bleepingcomputer.com/forums/topic432356.html
Basically I had/have a virus and ran combofix to try to get rid of it. Combofix warned that I had the zeroaccess virus and that I might not be able to access the internet afterwards. And that is exactly what happened. I think the virus deleted the files I need to access the web. I saw the suggestions in the other thread and downloaded and ran FSS. Here is the log. Thanks for any help.

Farbar Service Scanner
Ran by IBUYPOWER (administrator) on 27-12-2011 at 17:14:22
Microsoft Windows XP Home Edition Service Pack 3 (X86)
Boot Mode: Normal
****************************************************************

Internet Services:
============
Dhcp Service is not running. Checking service configuration:
The start type of Dhcp service is OK.
The ImagePath of Dhcp service is OK.
The ServiceDll of Dhcp service is OK.

NetBt Service is not running. Checking service configuration:
Checking Start type: Attention! Unable to retrieve start type of NetBt. The value does not exist.
Checking ImagePath: Attention! Unable to retrieve ImagePath of NetBt. The value does not exist.
Checking LEGACY_NetBt: Attention! Unable to open LEGACY_NetBt\0000 registry key. The key does not exist.


Connection Status:
==============
Localhost is accessible.
There is no connection to network.
Attempt to access Google IP returned error: Google IP is unreachable
Attempt to access Yahoo IP returend error: Yahoo IP is unreachable


File Check:
========
C:\WINDOWS\system32\dhcpcsvc.dll => MD5 is legit
C:\WINDOWS\system32\Drivers\afd.sys => MD5 is legit
C:\WINDOWS\system32\Drivers\netbt.sys => MD5 is legit
C:\WINDOWS\system32\Drivers\tcpip.sys => MD5 is legit
C:\WINDOWS\system32\Drivers\ipsec.sys => MD5 is legit
C:\WINDOWS\system32\dnsrslvr.dll => MD5 is legit
C:\WINDOWS\system32\svchost.exe => MD5 is legit
C:\WINDOWS\system32\rpcss.dll => MD5 is legit
C:\WINDOWS\system32\services.exe => MD5 is legit

Extra List:
=======
Gpc(3) IPSec(5) PSched(7) Tcpip(4)
0x080000000500000001000000020000000300000004000000060000000700000008000000

**** End of log ****

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#2 Broni

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Posted 27 December 2011 - 07:15 PM

You have missing/corrupted two registry keys.

Following steps involve registry editing. Please create new restore point before proceeding!!!
How to:
XP - http://support.microsoft.com/kb/948247
Vista and Seven - http://www.howtogeek.com/howto/windows-vista/create-a-restore-point-for-windows-vistas-system-restore/


Download XP.zip file from here: http://www.smartestcomputing.us.com/files/download/9-registry-network-keys/
Unzip the file.
You'll find several files inside.
Right click on netbt.reg file, click "Merge".
Allow registry merge.

Then....

Please go to Start=>Run (alternatively use Windows key+R), type regedit and click OK.
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root
Right-Click Root and select Permissions...
Under Security type while Everyone is selected put a check mark in the box under Allow next to Full Control.
Click Apply and OK.
Go back to files you download in previous step.
Double-click LEGACY_netbt.reg and confirm the prompt.
Please go back to the the Root key again while Everyone is selected remove check mark in the box under Allow next to Full Control and close the registry.


Restart computer, check on internet connection and post new FSS log

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