WORM_WIPMBR.A

To restore your system's Master Boot Record (MBR):

• On Windows 2000, XP, and Server 2003:

1. Insert your Windows Installation CD into your CD drive then restart your computer.
2. When prompted, press any key to boot from the CD.
3. On the Main Menu, type r to enter the Recovery Console.
   (Note for Windows 2000: After pressing r, type c to choose the Recovery Console on the repair options screen.)
4. Type the number that corresponds to the drive and folder that contains Windows (usually C:\WINDOWS) and press Enter.
5. Type your Administrator password and press Enter.
6. In the input box, type the following then press Enter:
   fixmbr {affected drive}
7. Type exit and press Enter to restart the system normally.

• On Windows Vista, 7, and Server 2008:

1. Insert your Windows Installation DVD into the DVD drive, then press the restart button on your computer.
2. When prompted, press any key to boot from the DVD.
3. Depending on your Windows Installation DVD, you might be required to choose the installation language. On the Install Windows window, choose your language, locale, and keyboard layout or input method. Click Repair your computer.
4. Select Use recovery tools that can help fix problems starting Windows. Select your installation of Windows. Click Next.
5. If the Startup Repair window appears, click Cancel, Yes, then Finish.
6. In the System Recovery Options menu, click Command Prompt.
7. In the Command Prompt window, type the following then press Enter:
   BootRec.exe /fixmbr
8. Type exit and press Enter to close the Command Prompt window.
9. Click Restart to restart your computer normally.

• On Windows 8, 8.1, and Server 2012:

1. Insert your Windows Installation DVD in the DVD drive, then restart your computer.
2. When prompted, press any key to boot from the DVD.
3. Depending on your Windows Installation DVD, you might be required to select the keyboard layout. Then on the Windows Setup window, choose your language, locale, and input method. Click Next, then click Repair your computer.
4. Click Troubleshoot>Advanced Options>Command Prompt.
5. In the Command Prompt window, type the following then press Enter:
   BootRec.exe /fixmbr
6. Type exit and press Enter to close the Command Prompt window.
7. Click Continue to restart the system normally.

To delete the registry key this malware/grayware/spyware created:

1. Restart your computer in Safe Mode. For instructions on how to do this, you may refer to this page.
2. Open Registry Editor. To do this:
   » For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
   » For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
3. In the left panel of the Registry Editor window, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services
4. Still in the left panel, locate and delete the key:
   drdisk
5. Again Still in the left panel, locate and delete the key:
   TrkSvr
6. Close Registry Editor.

To delete malware/grayware files:

For Windows 2000, Windows XP, and Windows Server 2003:

1. Right-click Start then click Search....
2. In the File name* input box, type
   
   • {Malware Path}\f1.inf
   • {Malware Path}\f2.inf
   • %Windows%\inf\netfb318.pnf
3. In the Look In drop-down list, select My Computer then press Enter.
4. Once located, select the file then press SHIFT+DELETE to delete it.
5. Repeat the said steps for all files listed.
   *Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

1. Open a Windows Explorer window.
   • For Windows Vista, 7, and Server 2008 users, click Start>Computer.
   • For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
2. In the Search Computer/This PC input box, type:
   
   • {Malware Path}\f1.inf
   • {Malware Path}\f2.inf
   • %Windows%\inf\netfb318.pnf
3. Once located, select the file then press SHIFT+DELETE to delete it.
4. Repeat the said steps for all files listed.
   *Note: Read the following Microsoft page if these steps do not work on Windows 7.

To restore registry values this malware/grayware modified:

1. Open Registry Editor. To do this:
   
   • On Windows 2000, XP, and Server 2003:
     Click Start>Run, type REGEDIT in the text box provided, and then press Enter.
   • On Windows Vista, 7, and Server 2008:
     Click the Start button, type REGEDIT in the Search input field then press Enter.
   • On Windows 8, 8.1, and Server 2012:
     Right-click on the lower left corner of the screen and click Run, type REGEDIT in the Run input field, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>LanmanWorkstation
3. In the right panel, locate the registry value:
   DependOnService = "Browser MRxSmb10 MRxSmb20 NSI TrkSvr"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   DependOnService = "Browser MRxSmb10 MRxSmb20 NSI"
5. Close Registry Editor.