BleepingComputer.com: Stuck at 'Acquiring network address' when connecting

Hello. I recently had a bit of trouble with a couple trojans infecting my laptop. I was able to get rid of them by uploading a copy of Malwarebytes via USB thumb drive. However, even with the viruses gone, the laptop can't connect to the internet anymore. Whenever I switch on the wireless radio, the connection always gets stuck at the 'Acquiring network address' stage, and can't get past it. Selecting the repair option has it getting stuck at the 'Renewing your IP address' part. Can someone suggest a fix? If I need to upload more info, let me know what I need to do. Thanks.

Here's the log from the MalwareBytes, in case it helps.


Malwarebytes' Anti-Malware 1.51.0.1200
www.malwarebytes.org

Database version: 6819

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

12/17/2011 4:50:28 PM
mbam-log-2011-12-17 (16-50-28).txt

Scan type: Full scan (C:\|D:\|)
Objects scanned: 304906
Time elapsed: 2 hour(s), 49 minute(s), 5 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 3
Folders Infected: 0
Files Infected: 2

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\AntiVirusDisableNotify (PUM.Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\FirewallDisableNotify (PUM.Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\UpdatesDisableNotify (PUM.Disabled.SecurityCenter) -> Bad: (1) Good: (0) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
c:\documents and settings\Douglas\local settings\application data\gsj.exe (Trojan.ExeShell.Gen) -> Quarantined and deleted successfully.
c:\WINDOWS\system32\fsquirt.exe (Trojan.Dropper.BCM) -> Quarantined and deleted successfully.

This post has been edited by hamluis: 18 December 2011 - 03:57 PM
Reason for edit: Moved from Web Browsing/Email to Am I Infected.

Welcome aboard

Please download Farbar Service Scanner and run it on the computer with the issue.

• Press "Scan".
  
• It will create a log (FSS.txt) in the same directory the tool is run.
  
• Please copy and paste the log to your reply.

This is what I got.


Farbar Service Scanner
Ran by Douglas (administrator) on 18-12-2011 at 13:53:27
Microsoft Windows XP Professional Service Pack 3 (X86)
********************************************************

Service Check:
==============
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 open NetBt registry key. The service key does not exist.
Checking ImagePath: Attention! Unable to open NetBt registry key. The service key does not exist.


File Check:
===========
C:\WINDOWS\system32\svchost.exe => MD5 is legit
C:\WINDOWS\system32\rpcss.dll => MD5 is legit
C:\WINDOWS\system32\services.exe => MD5 is legit
C:\WINDOWS\system32\dhcpcsvc.dll => MD5 is legit
C:\WINDOWS\system32\Drivers\afd.sys => MD5 is legit
Attention! C:\WINDOWS\system32\Drivers\netbt.sys is missing.
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

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

**** End of log ****

It looks like you have one file and one registry key missing.

Please download SystemLook from one of the links below and save it to your Desktop.
Download Mirror #1
Download Mirror #2
64-bit users go HERE

• Double-click SystemLook.exe to run it.
  
• Vista\Win 7 users:: Right click on SystemLook.exe, click Run As Administrator
  
• Copy the content of the following box and paste it into the main textfield:
  

  :filefind
  netbt.sys
  :reg
  HKEY_LOCAL_MACHINE\system\CurrentControlSet\Services\netbt /s
  

  
  
  
• Click the Look button to start the scan.
  
• When finished, a notepad window will open with the results of the scan. Please post this log in your next reply.

Note: The log can also be found on your Desktop entitled SystemLook.txt

SystemLook 30.07.11 by jpshortstuff
Log created at 15:31 on 18/12/2011 by Douglas
Administrator - Elevation successful

========== filefind ==========

Searching for "netbt.sys"
C:\WINDOWS\system32\dllcache\netbt.sys --a--c- 162816 bytes [06:51 14/04/2008] [06:51 14/04/2008] 74B2B2F5BEA5E9A3DC021D685551BD3D

========== reg ==========

[HKEY_LOCAL_MACHINE\system\CurrentControlSet\Services\netbt]
(Unable to open key - key not found)

-= EOF =-

Good

Open Windows Explorer, navigate to C:\WINDOWS\system32\dllcache folder, copy netbt.sys file from there and paste it to C:\WINDOWS\system32\Drivers folder.

Then...

Following steps involve registry editing. Please create new restore point before proceeding!!!

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

That did it! Internet is back up and running, and connecting properly! Thanks for the help!

Before I go, what should I do with the programs I downloaded? Should I keep them handy in case I have issues in the future? Not that I really know how to use them though...

Good job!

Before we delete anything I want you to run couple more scans.
Your situation didn't happen for no reason.

Download Security Check from HERE, and save it to your Desktop.

* Double-click SecurityCheck.exe
* Follow the onscreen instructions inside of the black box.
* A Notepad document should open automatically called checkup.txt; please post the contents of that document.

=============================================================================

Please download MiniToolBox and run it.

Checkmark following boxes:

• Report IE Proxy Settings
  
• Report FF Proxy Settings
  
• List content of Hosts
  
• List IP configuration
  
• List Winsock Entries
  
• List last 10 Event Viewer log
  
• List Installed Programs
  
• List Users, Partitions and Memory size

Click Go and post the result.

=============================================================================

* Update your Malwarebytes (your database is very outdated)
* Select Perform quick scan, then click Scan.
* When the scan is complete, click OK, then Show Results to view the results.
* Be sure that everything is checked, and click Remove Selected.
* When completed, a log will open in Notepad.
* Post the log back here.

Be sure to restart the computer.

The log can also be found here:
C:\Documents and Settings\Username\Application Data\Malwarebytes\Malwarebytes' Anti-Malware\Logs\log-date.txt
Or at C:\Program Files\Malwarebytes' Anti-Malware\Logs\log-date.txt

=============================================================================

Please download GMER from one of the following locations and save it to your desktop:

• Main Mirror
  This version will download a randomly named file (Recommended)
  
• Zipped Mirror
  This version will download a zip file you will need to extract first. If you use this mirror, please extract the zip file to your desktop.

• Disconnect from the Internet and close all running programs.
  
• Temporarily disable any real-time active protection so your security programs will not conflict with gmer's driver.
  
• Double-click on the randomly named GMER file (i.e. n7gmo46c.exe) and allow the gmer.sys driver to load if asked.
  
• Note: If you downloaded the zipped version, extract the file to its own folder such as C:\gmer and then double-click on gmer.exe.
  
  
  
  
• GMER will open to the Rootkit/Malware tab and perform an automatic quick scan when first run. (do not use the computer while the scan is in progress)
  
• If you receive a WARNING!!! about rootkit activity and are asked to fully scan your system...click NO.
  
• Now click the Scan button. If you see a rootkit warning window, click OK.
  
• When the scan is finished, click the Save... button to save the scan results to your Desktop. Save the file as gmer.log.
  
• Click the Copy button and paste the results into your next reply.
  
• Exit GMER and be sure to re-enable your anti-virus, Firewall and any other security programs you had disabled.

IMPORTANT! If for some reason GMER refuses to run, try again.
If it still fails, try to UN-check "Devices" in right pane.
If still no joy, try to run it from Safe Mode.