WORM_TATERF.NF

Since this malware cannot be removed in normal and safe mode, it is necessary to restart using the Windows Recovery Console. To restart the system using the Windows Recovery Console:

• On Windows XP and Server 2003 systems:

1. Click Start>Run. In the Open input box, type secpol.msc and press Enter.
2. In the left panel, double-click Local Policies>Security Options.
3. In the right panel, double-click Recovery Console: Allow floppy copy and access to all drives and folders.
4. Select Enabled and click OK.
5. Insert the Windows Installation CD into the CD drive, then restart your computer.
6. When prompted, press any key to boot from the CD.
7. On the main menu, type r to go to the Recovery Console.
8. Type the number that corresponds to the drive and directory that contains Windows (usually C:\WINDOWS) and press Enter.
9. Type the Administrator password and press Enter.
10. In the input box, type the following then press Enter:
    SET AllowAllPaths = TRUE
    
    • cd %System Root%
    • del s9h3v.bat
    • cd %User Temp%
    • del 4tddfwq0.dll
    • del xvassdf.exe
    • cd {Drive Letter}
    • del s9h3v.bat
    • Repeat the last two lines for other Physical/Removable Drives - DO NOT TYPE THIS LINE
11. Type exit and press Enter to restart the system normally.

• On Windows Vista and 7 systems:

1. Insert your Windows Installation DVD in the DVD drive, then Press the restart button.
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 installation language. Then on the Install Windows window, choose your language, locale, and keyboard layout or input method. Click Next, then 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 window, click Command Prompt.
7. In the Command Prompt window, type the following then press Enter:
   
   • cd %System Root%
   • del s9h3v.bat
   • cd %User Temp%
   • del 4tddfwq0.dll
   • del xvassdf.exe
   • cd {Drive Letter}
   • del s9h3v.bat
   • Repeat the last two lines for other Physical/Removable Drives - DO NOT TYPE THIS LINE
   
   (Note: In Windows 7, all local drives will be assigned one more than normal. For example, the C: drive becomes D:.)
8. Type exit and press Enter to close the Command Prompt window.
9. Click Restart to restart the system normally.

To delete the registry value this malware created:

1. Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
2. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   54dfsger = "%User Temp%\xvassdf.exe"
4. Close Registry Editor.

To restore the registry value this malware/grayware modified:

1. Open Registry Editor. Click Start>Run, type REGEDIT in the text box provided, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>Advanced
3. In the right panel, locate the registry value:
   Hidden = "2"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Hidden = "1"
5. Again In the right panel, locate the registry value:
   ShowSuperHidden = "0"
6. Right-click on the value name and choose Modify. Change the value data of this entry to:
   ShowSuperHidden = "1"
7. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer>Advanced>Folder>Hidden>SHOWALL
8. In the right panel, locate the registry value:
   CheckedValue = "0"
9. Right-click on the value name and choose Modify. Change the value data of this entry to:
   CheckedValue = "1"
10. Close Registry Editor.

To delete registry keys this malware/grayware created:

1. Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
2. In the left panel of the Registry Editor window, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services
3. Still in the left panel, locate and delete the key:
   AVPsys
4. Close Registry Editor.

To identify and delete AUTORUN.INF files created:

1. Right-click the Start button then choose Search... or Find..., depending on the version of Windows you are running.
2. In the Named input box, type:
   AUTORUN.INF
3. In the Look in: drop-down list, select a drive, then press Enter.
4. Select the file, then open using Notepad.
5. Check if the following lines are present in the file:
   [AutoRun]
   open=s9h3v.bat
   shell\open\Command=s9h3v.bat
6. If the lines are present, delete the file.
7. Repeat steps 3 to 6 for the remaining AUTORUN.INF files in other remaining removable drives.
8. Close Search Results.