Help with rootkit

Put the hard drive back into the computer it came out of and do the following:

Please do the below so that we can boot to System Recovery Options to run a scan. There will be two options to choose from. One if you do not have your Windows 7 boot DVD and another when you have your DVD.

For x32 (x86) bit systems download Farbar Recovery Scan Tool and save it to a flash drive.
For x64 bit systems download Farbar Recovery Scan Tool x64 and save it to a flash drive.

Plug the flashdrive into the infected PC.

Option1: 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.
• Select US as the keyboard 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.

Option2: 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.
• Select US as the keyboard 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.

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 file to your next reply. (See: How to attach)

 

No, it doesn;t work on XP. Your best bet at this point is going to be a reinstall.

 

What drive are you trying to boot to? Your MBRCheck shows your main drive is Windows 7, and the faked MBR is another partition. Is that the one you are trying to fix? Can you not boot to Win.7?

 

Now I understand. You still have it slaved.

Do you have all important data backed up? You really should do this before continuing since we will need to rewrite your MBR to fix this and while most times this can be done without any problem, these infections can react badly and that could result in a PC not being bootable. You really don't have much choice though since these infections are too dangerous to your security to leave on a PC.

Also note if you have a Dell PC which uses a non-standard MBR ( or another manufacturer's who does similar to Dell) , fixing the mbr may prevent access the the Dell Restore Utility, which allows you to press a key on startup and revert your computer to a factory delivered state. There are a couple of known fixes for said condition, though the methods are somewhat advanced. If you are unwilling to take such a risk, you should not continue but you risk serious problems leaving this infection in place and thus your only other option would be to try using the Dell Restore Utility to return a factory ship state which will remove everything you additional you have put onto the PC.


Now if you wish to continue and fix the malware - please do the following:

* Run MBRCheck.exe
* Wait until you see the following lines:
o Enter 'Y' and hit ENTER for more options, or 'N' to exit:
o Options:
[1] Dump the MBR of a physical disk to file.
[2] Restore the MBR of a physical disk with a standard boot code.
[3] Exit.
Enter your choice:

* Please push the 'Y' key and then press Enter
* When the program asks you to Enter your choice: enter 2 to Restore the MBR and press the Enter key
* Now the program will ask you to "Enter the physical disk number to fix (0-99, -1 to cancel):"
o Enter 1 and press the Enter key.
* The program will show Available MBR codes as below

* You need to select your version of Windows from the list. For example, enter 0 or 1 for XP or enter 3 for Vista.....etc. and then press Enter.
* The program will prompt for confirmation. Type 'YES' and hit Enter.
* Left click on the title bar (where program name and path is written). From menu chose Edit -> Select All
* You will see all the text in the window get highlighted.
* Hit the Enter key on your keyboard to copy all of the text into the clipboard.
* Paste that text into Notepad, save it to your desktop as MBRfix.txt
* Restart your PC.
* Attach the MBRfix.txt file to your next message..

Now please re-run MBRCheck.exe and attach that log also.

 

Since you ran MBRCheck with the drive slaved, keep it that way and run the procedure. MBR identified the slave drive as drive 1, so it will not affect the Win7 drive.

 

Let's try a different approach.
Put the drive back into the original computer.
1. Insert the Windows XP CD-ROM into the CD-ROM drive.
2. Restart the computer from the CD-ROM drive.
3. Press R to start the Recovery Console when the "Welcome to Setup" screen appears.
4. Select the installation that you want to access from the Recovery Console.
5. Enter the administrator password and press Enter.
6. Type the following command and press Enter:
fixmbr
7. Following the onscreen instructions to restore the Master Boot Record.
8. Type exit
9. Press Enter. The computer will now restart automatically.

Does it now boot up?

 

I'm afraid you will have to do a clean install.

 

Sorry I couldn't be of better assistance. If you need help reinstalling, post in the software forum. And good luck.