Can't access internet and firewall is down

You have a zero access infection.

For 32-bit (x86) systems download Farbar Recovery Scan Tool and save it to a flash drive.
For 64-bit (x64) systems download Farbar Recovery Scan Tool x64 and save it to a flash drive.

Plug the flashdrive into the infected PC.

Enter System Recovery Options.

To enter System Recovery Options from the Advanced Boot Options:

• Restart the computer.
• As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
• Use the arrow keys to select the Repair your computer menu item.
• Choose your language settings, and then click Next.
• Select the operating system you want to repair, and then click Next.
• Select your user account and click Next.

To enter System Recovery Options by using Windows installation disc:

• Insert the installation disc.
• Restart your computer.
• If prompted, press any key to start Windows from the installation disc. If your computer is not configured to start from a CD or DVD, check your BIOS settings.
• Click Repair your computer.
• Choose your language settings, and then click Next.
• Select the operating system you want to repair, and then click Next.
• Select your user account an click Next.

On the System Recovery Options menu you will get the following options:

• Select Command Prompt
• In the command window type in notepad and press Enter.
• The notepad opens. Under File menu select Open.
• Select "Computer" and find your flash drive letter and close the notepad.
• In the command window type e:\frst.exe (for x64 bit version type e:\frst64) and press Enter
• Note: Replace letter e with the drive letter of your flash drive.
• The tool will start to run.
• When the tool opens click Yes to disclaimer.
• Press Scan button.
• It will make a log (FRST.txt) on the flash drive. Please attach this log to your next reply. (How to attach)

 

You can get rid of old logs now:

• C:\MGtools2012.zip
• C:\Users\Administrator\Documents\MGlogs_August2012.xlsx

Fix items using RogueKiller.

Double-click RogueKiller.exe to run. (Vista/7/8 right-click and select Run as Administrator)
When it opens, press the Scan button
Now click the Registry tab and locate these detections:

• [ZeroAccess][Folder] L -- C:\Windows\SysWOW64\config\systemprofile\AppData\Local\{792f4199-0b73-e2f4-7b46-706eb422a6b8}\L -> FOUND
• [ZeroAccess][Folder] U -- C:\Windows\SysWOW64\config\systemprofile\AppData\Local\{792f4199-0b73-e2f4-7b46-706eb422a6b8}\U -> FOUND

Place a checkmark next to each of these items, leave the others unchecked.
Now press the Delete button.
When it is finished, there will be a log on your desktop called: RKreport[2].txt
Attach RKreport[2].txt to your next message. (How to attach)
Reboot the machine.




NOTICE: This script was written specifically for this user, for use on that particular machine. Running this on another machine may cause damage to your operating system

Attached is fixlist.txt

• Save fixlist.txt to your flash drive.
• You should now have both fixlist.txt and FRST64.exe on your flash drive.

Now re-enter System Recovery Options.
Run FRST64 and press the Fix button just once and wait.
The tool will make a log on the flashdrive (Fixlog.txt).
Please attach this to your next message. (How to attach)


Re run RogueKiller again (just a scan) and attach new log.

Explain how things are running.

 

Just run FRST again like you did in post #4. Attach log.
Re run RogueKiller and attach log.

 

What is this? :confused
C:\Windows\System32\8U+4LJxFqBUiWEtZjE1.l

Now run the C:\MGtools\GetLogs.bat file by double clicking on it. (Right click and run as admin if using Vista, Windows7 or Win8) Then attach the new C:\MGlogs.zip file that will be created by running this.

 

That's your Windows 7 license key and activation data! Safe.

This however, looks wrong.

C:\Windows\SysNative\8U+4LJxFqBUiWEtZjE1.l

Are you able to just delete it?

 

Download and run OTM.

Download OTM by Old Timer and save it to your Desktop.

• Right-click OTM.exe And select " Run as administrator " to run it.
• Paste the following code under the area. Do not include the word Code.

Code:

:Files
C:\Windows\SysNative\8U+4LJxFqBUiWEtZjE1.l
:Commands
[emptytemp]
[Reboot]

• Return to OTM, right click in the Paste List of Files/Folders to Move window (under the yellow bar) and choose Paste.
• Push the large button.
• OTM may ask to reboot the machine. Please do so if asked.
• Copy everything in the Results window (under the green bar), and paste it into a text file to ATTACH into your next reply.

NOTE: If you are unable to copy/paste from this window (as will be the case if the machine was rebooted), open Notepad (Start->All Programs->Accessories->Notepad), click File->Open, in the File Name box enter *.log and press the Enter key, navigate to the C:\_OTM\MovedFiles folder, and open the newest .log file present, and attach the contents of that document back here in your next post.


Now run the C:\MGtools\GetLogs.bat file by double clicking on it. (Right click and run as admin if using Vista, Windows7 or Win8) Then attach the new C:\MGlogs.zip file that will be created by running this.

 

Please download BlitzBlank to your desktop.

• Double-click BlitzBlank.exe to open (Vista/7 right-click and select Run as Administrator)
• Press OK at the warning prompt.
• Click the Script tab
• Copy the text inside the code box below and paste it into the text-field.

Code:

[COLOR="DarkRed"]DeleteFile:[/COLOR]
C:\Windows\SysNative\8U+4LJxFqBUiWEtZjE1.l

• Now click the Execute Now button.
• The fix will require a reboot in order to complete successfully.
• Upon reboot, locate C:\blitzblank.log and attach this log to your next message. (How to attach)

Now run the C:\MGtools\GetLogs.bat file by double clicking on it. (Right click and run as admin if using Vista, Windows7 or Win8) Then attach the new C:\MGlogs.zip file that will be created by running this.

 

Does it let you rename the file at all?

 

Please download Combofix to your desktop. Please refer to these instructions prior to running. Attach log once done.


Download Windows Repair by Tweaking.com and unzip the contents into a newly created folder on your desktop.

• Now run Repair_Windows.exe by double clicking on it ( if you are running Vista or Win 7, use right click and select Run As Administrator)
• Now select the Start Repairs tab.
• The click the Start button.
• Create a System Restore point if prompted.
• On the next screen, click the Unselect All button to first deselect all repairs.
• Now select the following repair options:
  • Reset Registry Permissions
  • Reset File Permissions
  • Register System Files
  • Repair WMI
  • Repair Windows Firewall
  • Remove Policies Set By Infections
  • Repair Winsock & DNS Cache
  • Repair Proxy Settings
  • Repair Windows Updates
  • Set Windows Services To Default Startup
• Now on the lower right side check the box to Restart/Shutdown System When Finished
• Then make sure the Restart System radio button is enabled.
• Shutdown any other programs that you are running now before continuing.
• Now click the Start button.
• Be patient while the tool repairs the selected items.
• It should reboot automatically when finished.

 

False positive indeed. Temporarily disable your protection software and then run Combofix please.

 

Did you run Combofix?? If so attach the log please.

 

Now we need to use ComboFix

• Make sure that combofix.exe that you downloaded while doing the READ & RUN ME is on your Desktop but Do not run it!
  • If it is not on your Desktop, the below will not work.
• Also make sure you have shut down all protection software (antivirus, antispyware...etc) or they may get in the way of allowing ComboFix to run properly.
• If ComboFix tells you it needs to update to a new version, make sure you allow it to update.
• Open Notepad and copy/paste the text in the below quote box. Ensure you scroll down to select ALL the lines:

Code:

KILLALL::

File::
C:\Windows\SysNative\8U+4LJxFqBUiWEtZjE1.l

• Save the above as CFscript.txt and make sure you save it to the same location (should be on your Desktop) as ComboFix.exe
• At this point, you MUST EXIT ALL BROWSERS NOW before continuing!
• You should have both the ComboFix.exe and CFScript.txt icons on your Desktop.
• Now use your mouse to drag CFscript.txt on top of ComboFix.exe
  
  
  
  
• Follow the prompts.
• When it finishes, a log will be produced named c:\combofix.txt
• I will ask for this log below

Note:

Do not mouseclick combofix's window while it is running. That may cause it to stall.

If after running Combofix you discover none of your programs will open up, and you recieve the following error: "Illegal operation attempted on a registry key that has been marked for deletion". Then the answer is to REBOOT the machine, and all will be corrected.


Now run the C:\MGtools\GetLogs.bat file by double clicking on it. (Right click and run as admin if using Vista, Windows7 or Win8) Then attach the new C:\MGlogs.zip file that will be created by running this.

 

Do you have your Windows 7 boot CD? I was thinking we could boot into the Recovery Console and try and delete it (and the file we created accidentally) that way.

We could also try Unlocker to see if that works, but take note when installing it:

 

Okay. Just so you know I'm in the UK so if you don't hear back from me tonight, I'll be online again tomorrow.

 

When HJT says "File missing" it is most often the case not true. Hence you have to be careful if doing stuff on your own. Look, this one is baffling me, I've used mostly every tool I can think of to try and eradicate that file. I am seeking advice from my colleagues about it. Please hang in there.

Do this in the mean time so I can take a closer look at it:


Could you please get this: 8U+4LJxFqBUiWEtZjE1.l into a zipped file and attach it for me in your next post? To do this, see the below:

Please go to start > Run and paste in the following:

log retrievable @ C:\collect.zip

Also visit VirusTotal and see what it reports about the file. I am sure it's not good.

 

Good idea.

Thanks. But I am struggling with this one. That file I just examined is all "gobbledegook" no signs of it being anything legit, but then again, nothing is detecting the file either including virustotal. Perhaps it's attached to something valid but the file name is terrible if it is!

I don't suppose we ever tried just manually deleting it did we? I doubt it would work anyway. Hang in there.

 

Naw I didn't think you were. No worries.

Right click on the problem file, click on the security tab > click on edit by where it says "Change permissions" click administrators and click apply. Click OK.

Now try and delete it. Let me know what happens.

 

Everything in the screenshot is fine. Please continue to be patient as you have been doing until colleagues can chime in. I'm seeking advice in the background. Thanks for your understanding.

 

File Assassin

I think this is compatible with Windows 7, let's give it a whirl.

-------------
We could also try LockHunter.


Check out the features and the description of the software, and let me know how you get on.

-------------

Worst comes to the worst you can always boot from a Linux LiveCD, Windows PE and try deleting from there, but that is not my territory I'm afraid.

 

I have just downloaded FileAssasin, and it delete the file. (I downloaded a copy of the file you attached; to my desktop) There may be some compatibility issues with Win7. But it deleted the file. Just did not place into recycle bin as promised. Not that we care in this instance.

I'm going to reboot and check if it returns (obviously it might just delete straight away for me. It could be tied into something else on your system, so not quite a true test.)

Back in a minute...

 

It worked for me. The file did not return. Hope the same occurs in your case. I may be online next tomorrow, it's getting rather late here.

 

OK, I have had a talk with Chaslang and we don't believe the file is malware anymore. We think it's tied into something you have installed. Now, as for what problems remain... is your internet still down? Is your firewall still down?

 

Please uninstall avast! and let us know if your internet connection returns.

 

I didn't. :-D Chaslang did. Ready for final steps at this point? Everything running nicely?