Back Door Trojan has Hijacked my computer!!

Viruses and worms
21

23 is the last HJT entry http://www.bleepingcomputer.com/tutorials/how-to-use-hijackthis/#O24Diag

For malware to enter the BIOS is something I have not yet come across

My final idea would be to run Combofix to see if it can locate any suspect drivers

22

Now, when I try to almost anything, a dialog box says"Illegal operation attempted on a registry key that has been marked for
deletion" or “Unspecified error”. I did get ComboFix to run before it got too bad.

23

A reboot will cure that, Combofix failed to release the registry

OK combofix saw them

  1. Close any open browsers.
  2. Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
  3. Open notepad and copy/paste the text in the quotebox below into it:
File:: c:\users\norm\AppData\Local\Temp\QXZYMYYPCG.exe c:\users\norm\AppData\Local\Temp\SQKJFMCSF.exe c:\users\norm\AppData\Local\Temp\XCPIQEYC.exe c:\users\norm\AppData\Local\Temp\YVD.exe

Driver::
QXZYMYYPCG
SQKJFMCSF
XCPIQEYC
YVD

Save this as CFScript.txt, in the same location as ComboFix.exe

http://img.photobucket.com/albums/v666/sUBs/CFScriptB-4.gif

Refering to the picture above, drag CFScript into ComboFix.exeWhen finished, it shall produce a log for you at C:\ComboFix.txt which I will require in your next reply.

Notes:

  1. Do not mouse-click Combofix’s window while it is running. That may cause it to stall.
  2. Do not “re-run” Combofix. If you have a problem, reply back for further instructions.
  3. If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.
24

I ran ComboFix twice. I hope that’s not counterproductive.

25

Did you create the CFScript text file and drag and drop onto the combofix icon ? As combofix is not reporting that as happening

26

I think I got it right this time.

27

Two more

  1. Close any open browsers.
  2. Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
  3. Open notepad and copy/paste the text in the quotebox below into it:
File:: c:\users\norm\AppData\Local\Temp\ESFODCY.exe c:\users\norm\AppData\Local\Temp\LLT.exe

Driver::
ESFODCY
LLT

Save this as CFScript.txt, in the same location as ComboFix.exe

http://img.photobucket.com/albums/v666/sUBs/CFScriptB-4.gif

Refering to the picture above, drag CFScript into ComboFix.exeWhen finished, it shall produce a log for you at C:\ComboFix.txt which I will require in your next reply.

Notes:

  1. Do not mouse-click Combofix’s window while it is running. That may cause it to stall.
  2. Do not “re-run” Combofix. If you have a problem, reply back for further instructions.
  3. If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.
28

Here’s the latest.

29

OK that appears to be all the bad drivers. Is there any change in the computer ?

30

It seems much better, Rootkit revealer still won’t run (it does on another laptop) and RootkitBuster found two errors
and deleted them, but still displays mythical errors. I know they’re not real, but the fact that they’re still there
bothers me.

Correction: Rootkit revealer does NOT run on a Win 7 machine—My error.

31
Operating System Hook ZwAddBootEntry; hooked by C:\Windows\System32\Drivers\aswSnx.SYS
Is this the rootkit buster one you are concerned about ? As it is the Avast sandbox
32

Well, I’ll guardedly say we may have fixed this PC. The only problem I still have is that I had the HDD out and reformatted
it with/u, replaced the system RAM with a new stick, removed the motherboard and took the BIOS battery out and this
malware was still there. I did all this twice to be sure. It will be a while until I put anything important on here, but it’s
been working properly most of the day.

I’d like to thank you for all your help, time and effort and expertise. You’ve done me a great favor. If you ever have any
Ham radio questions, be sure to ask.

33

Subject to no further problems :slight_smile:

I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems

Now the best part of the day ----- Your log now appears clean :thumbsup:

A good workman always cleans up after himself so…The following will implement some cleanup procedures as well as reset System Restore points:

Run OTL
[*]Under the Custom Scans/Fixes box at the bottom, paste in the following

:Commands [resethosts] [emptytemp] [Reboot]

[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done

Remove ComboFix

[*]Hold down the Windows key + R on your keyboard. This will display the Run dialogue box
[*]In the Run box, type in ComboFix /Uninstall (Notice the space between the “x” and “/”) then click OK

http://i1224.photobucket.com/albums/ee362/Essexboy3/Misc%20screen%20shots/CF_Uninstall-1.jpg

[]Follow the prompts on the screen
[]A message should appear confirming that ComboFix was uninstalled

Run OTL and hit the cleanup button. It will remove all the programmes we have used plus itself.

We will now confirm that your hidden files are set to that, as some of the tools I use will change that

[*]Go to control panel
[*]Select folder options (Appearance > Folder options in category view)
[*]Select the View Tab.
[*]Under the Hidden files and folders heading select Do not show hidden files and folders.
[]Click Yes to confirm.
[]Click OK.

SPRING CLEAN

To manually create a new Restore Point

[*]Go to Control Panel and select System
[*]Select System
[*]On the left select System Protection and accept the warning if you get one
[*]Select System Protection Tab
[*]Select Create at the bottom
[*]Type in a name i.e. Clean
[*]Select Create

Now we can purge the infected ones

[*]GoStart > All programs > Accessories > system tools
[*]Right click Disc cleanup and select run as administrator
[*]Select Your main drive and accept the warning if you get one
[*]For a few moments the system will make some calculations
[*]Select the More Options tab
[*]In the System Restore and Shadow Backups select Clean up
[*]Select Delete on the pop up
[]Select OK
[]Select Delete

Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

http://img233.imageshack.us/img233/7729/mbamicontw5.gif

Malwarebytes. Update and run weekly to keep your system clean

Download and install FileHippo update checker and run it monthly it will show you which programmes on your system need updating and give a download link

It is critical to have both a firewall and anti virus to protect your system and to keep them updated. To keep your operating system up to date visit

[*]Microsoft Windows Update

To learn more about how to protect yourself while on the internet read our little guide How did I get infected in the first place ?

Keep safe :wave: