BackDoor.Generic15.XCE removal. Help desperately needed.

[Mortson]

I have downloaded an infected file accidentally and been infected with the BackDoor.Generic15.XCE trojan. I doubled clicked the infected file to find that it promptly disappeared and then recieved an AVG security alert. AVG cannot remove it as it is "inaccessible".

I have a Windows install disk and am running 64-bit Windows 7 Home.

The logs are attached as requested.

[Kestrel13!]

Can you attach the MGlogs.zip as a result of running MGTools.exe please?

[Mortson]

Here you go.

[Kestrel13!]

I want you to run TDSSKiller so refer to the below for how to do so.

TDSSkiller - How to run


Please also download MBRCheck to your desktop

• Double click MBRCheck.exe to run (vista and Win 7 right click and select Run as Administrator)
• It will show a Black screen with some information that will contain either the below line if no problem is found:
  • Done! Press ENTER to exit...
• Or you will see more information like below if a problem is found:
  • Found non-standard or infected MBR.
  • Enter 'Y' and hit ENTER for more options, or 'N' to exit:
• Either way, just choose to exit the program at this point since we want to see only the scan results to begin with.
• MBRCheck will create a log named similar to MBRCheck_07.16.10_00.32.33.txt which is random based on date and time.

[Mortson]

Done and done. Logs attached.

[Kestrel13!]

Before we continue I would like for you to use MSConfig to put this machine back into normal start up mode


Please disable Spybot's TeaTimer.

How to disable Spybot's TeaTimer

Uninstall the following softwares:

• IMinent Toolbar
• Ask Toolbar
• Java(TM) 6 Update 31
• Messenger Plus! for Skype
• Messenger Plus!

Now we need to use ComboFix by sUBs

• 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:

KILLALL::

DirLook::
c:\programdata\CCP
c:\program files (x86)\CCP
c:\users\Josh\AppData\Local\CCP
File::
C:\Windows\131794

• 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.


Reboot your machine and install the most current and up to date version of Java available here at the below link:

Java Runtime 6

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

Let me know of any problems you may have encountered with the above instructions and also let me know how things are running now!

[Mortson]

Done as instructed. Nothing really seemed off in the first place so I couldn't tell you anything different about the system now and at the start.

MGLogs are attached. The combofix one is too large, how should I send it to you?

[Mortson]

Don't worry, I've stuck it in a zip folder.

[Kestrel13!]

AVG cannot remove it as it is "inaccessible".

What is the exact file name and file path of the "threat"?

[Mortson]

The location is C:\Users\Josh\AppData\Local\Temp\svchost.exe (5968):\memory_00400000. Not sure about file name.

[Mortson]

Could you please let me know how close you think we are to solving this problem? Thanks.

[Kestrel13!]

The location is C:\Users\Josh\AppData\Local\Temp\svchost.exe (5968):\memory_00400000. Not sure about file name.

You have included the file name.

Could you please let me know how close you think we are to solving this problem? Thanks.

Could you take a look at this please? Thanks. Don't bump!!

Now we need to use ComboFix by sUBs

• 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:

KILLALL::

File::
C:\Users\Josh\AppData\Local\Temp\svchost.exe

• 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.


Let me know if avg is still complaining.

[Mortson]

Log attached. AVG picked up nothing in a scan I just did.

[Kestrel13!]

Combofix ran in reduced functionality mode as you will see from viewing the log file. As long as avg has stopped complaining then it is not a problem. Let a day go by and let me know how things are running. If all is well, I will post the final steps for you to follow.

[Mortson]

All running fine. Is the trojan gone?

[Mortson]

Now that I have been using it a little bit, the system seems quite slow. I looked on Task Manager and it says that the memory usage is 914MB out of 2GB (not sure if this is normal). This is when no programmes are running.

I also had an AVG alert pop up with the name of the infected file and then asked me to move it to the Virus Vault. I did this, then deleted it form the Vault.

Is there anything else I can do to make sure this trojan is gone?

[Kestrel13!]

Run a FULL system scan with avg and let me know the results.


Download OTL to your desktop.

• Double click on the icon to run it. Make sure all other windows are closed and to let it run uninterrupted.
• Vista and Windows 7 users Right-click OTL and choose Run as Administrator)
• When the window appears, underneath Output at the top change it to Minimal Output.
• Check the boxes beside LOP Check and Purity Check.
• Click the Run Scan button. Do not change any settings unless otherwise told to do so. The scan wont take long.

When the scan completes, it will open two notepad windows. OTL.Txt and Extras.Txt. These are saved in the same location as OTL.

Attach both of these logs into your next reply.

[Mortson]

AVG came up fine. Extras didn't appear but the other log did.

[Kestrel13!]

If you are not having any other malware problems, it is time to do our final steps:

1. We recommend you keep SUPERAntiSpyware and Malwarebytes Anti-Malware for scanning/removal of malware. Unless you purchase them, they provide no protection. They do not use any significant amount of resources ( except a little disk space ) until you run a scan.
2. If we had you use ComboFix, uninstall ComboFix (This uninstall will only work as written if you installed ComboFix on your Desktop like we requested.)
   • Click START then RUN and enter the below into the run box and then click OK. Note the quotes are required
   • "%userprofile%\Desktop\combofix" /uninstall
     • Notes: The space between the combofix" and the /uninstall, it must be there.
     • This will uninstall ComboFix and also reset hidden files and folders settings back to Windows defaults.
3. Go back to step 6 of the READ ME and renable your Disk Emulation software with Defogger if you had disabled it.
4. Any other miscellaneous tools we may have had you install or download can be uninstalled and deleted.
5. If we had you download any registry patches like fixme.reg or fixWLK.reg (or any others), you can delete these files now.
6. If running Vista, it is time to make sure you have reenabled UAC by double clicking on the C:\MGtools\enableUAC.reg file and allowing it to be added to the registry.
7. Go to add/remove programs and uninstall HijackThis.
8. Goto the C:\MGtools folder and find the MGclean.bat file. Double click on this file to run this cleanup program that will remove files and folders
   related to MGtools and some other items from our cleaning procedures.
9. If you are running Win 7, Vista, Windows XP or Windows ME, do the below:
   • Refer to the cleaning procedures pointed to by step 7 of the READ ME
     for your Window version and see the instructions to Disable System Restore which will flush your Restore Points.
   • Then reboot and Enable System Restore to create a new clean Restore Point.
10. After doing the above, you should work thru the below link:
    • How to Protect yourself from malware!