W32.Dinoxi.B - Removal

The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

1. Disable System Restore (Windows Me/XP).
2. Download tools and latest virus definitions on another computer
3. Restart the computer as Safe Mode with Command Prompt
4. Run the bat file from command prompt
5. Run explorer from command prompt
6. Log off, log on computer and run explorer
7. Update virus definitions
8. Run a full system scan and delete all the files detected.
9. Delete any values added to the registry.
10. Reset the Internet Explorer home page.
    

For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:

• How to disable or enable Windows Me System Restore
• How to turn off or turn on Windows XP System Restore

Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).

2. To download tools and virus definitions on another computer.

W32.Dinoxi makes changes to the Windows registry that may prevent you from running the registry editor. Security Response has developed a tool to reset these values to the default settings.





Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to Virus Definitions (Intelligent Updater).

The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.

After downloading tools and virus definitions, please copy them to infected computer.

3. To restart computer as Safe Mode with Command Prompt

For instructions, read the document, "How to start the computer in Safe Mode." Once you have restarted in Safe mode, run the scan again.

4. Using the tool from Command Prompt

Type fxdinoxi.bat

Note: Before using the tool, please make sure both fxdinoxi.bat and fxdinoxi.inf files are in same folder.

Once you have run the tool, return to this page and continue with the removal.

5. To run Explorer from Command prompt

Type Explorer

6. To log off, log on computer and run Explorer

Click Start > Log off

Log on again

This will allow the changes made to the registry to go through.

Type Explorer

7. To update the virus definitions
Run Inteligent Updater that is downloaded at Removal Instruction #2

8. To scan for and delete the infected files

1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
   • For Norton AntiVirus consumer products: Read the document: How to configure Norton AntiVirus to scan all files.
   • For Symantec AntiVirus Enterprise products: Read the document: How to verify that a Symantec Corporate antivirus product is set to scan all files.
2. Run a full system scan.
3. If any files are detected, click Delete.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

9. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.

1. Click Start > Run.
2. Type regedit
3. Click OK.
   
   Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.
   
   
4. Navigate to the subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   
   
5. In the right pane, delete the value:
   
   "ScanRegistry" = ""
   
   
6. Navigate to the subkey:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
   
   
7. In the right pane, delete the value:
   
   "SchedulingAgent" = ""
   
   
8. Navigate to the subkey:
   
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
   
   
9. In the right pane, delete the values:
   
   "DisableTaskmgr" = "1"
   "DisableRegistryTools" = "1"
   
   
10. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WinOldApp
    
    
11. In the right pane, delete the value:
    
    "Disabled" = "1"
    
    
12. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
    
    
13. In the right pane, delete the value:
    
    "NoDevMgrPage" = "1"
    
    
14. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WinOldApp
    
    
15. In the right pane, delete the value:
    
    "NoRealMode" = "1"
    
    
16. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
    
    
17. In the right pane, delete the values:
    
    "NoRun" = "hex:01,00,"
    "NoFind" = "1"
    "NoClose" = "hex:01,00,"
    "NoLogOff" = "hex:01,00,"
    "NoDrives" = "3FFFFFF"
    "NoDesktop" = "1"
    "NoSaveSettings" = "hex:00,00,"
    "NoViewContextMenu" = "hex:01,00,"
    "NoTrayContextMenu" = "hex:01,00,"
    "RestrictRun" = "1"
    "NoSetFolders" = "F4240"
    "NoFavoritesMenu" = "1"
    "NoRecentDocsMenu" = "1"
    "NoSetTaskbar" = "1"
    
    
18. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Restrictions
    
    
19. In the right pane, delete the value:
    
    "NoBrowserClose" = "1"
    
    
20. Navigate to the subkey:
    
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Winlogon
    
    
21. Reset the values to the original value, if applicables:
    
    "LegalNoticeCaption" = "??????"
    "LegalNoticeText" = "???????????"
    
    
22. Navigate to the subkey:
    
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer
    
    
23. Reset the value to the original value, if applicable:
    
    "NoDesktop" = "1"
    
    
24. Navigate to the subkeys:
    
    HKEY_CLASSES_ROOT\.inf
    HKEY_CLASSES_ROOT\.reg
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.inf
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.reg
    
    
25. Reset the value to the original value, if applicable:
    
    "@" = "txtfile"
    
    
26. Navigate to the subkeys:
    
    HKEY_CLASSES_ROOT\Folder\shell\explore\ddeexec
    HKEY_CLASSES_ROOT\Folder\shell\open\ddeexec
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\shell\explore\ddeexec
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Folder\shell\open\ddeexec
    
    
27. Reset the value to the original value, if applicable:
    
    "@" ="rem [ViewFolder(%l, %I, %S)]"
    
    
28. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Control Panel\International
    
    
29. Reset the values to the original value, if applicables:
    
    "s1159" = "??????"
    "s2359" = "??????"
    "STimeFormat" = "HH:mm:ss tt"
    
    
30. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Control Panel\Keyboard
    
    
31. Reset the value to the original value, if applicable:
    
    "KeyboardDelay" = "9"
    
    
32. Navigate to the subkey:
    
    HKEY_CURRENT_USER\Control Panel\Mouse
    
    
33. Reset the values to the original value, if applicables:
    
    "DoubleClickSpeed" = "100"
    "MouseSensitivity" = "5"
    "MouseSpeed" = "0"
    "SwapMouseButtons" = "1"
    
    
34. Navigate the subkey:
    
    HKEY_CLASSES_ROOT\CLSID\{01E04581-4EEE-11d0-BFE9-00AA005B4383}\InProcServer32
    
    
35. Reset the value to the original value:
    
    "(Default)" = "%SystemRoot%\system32\browseui.dll"
    
36. Exit the Registry Editor.
    
    

10. To reset the Internet Explorer home page

1. Start Microsoft Internet Explorer.
2. Connect to the Internet, and then go to the page that you want to set as your home page.
3. Click Tools > Internet Options.
4. In the Home page section of the General tab, click Use Current > OK.

For additional information, or if this procedure does not work, read the Microsoft® Knowledge Base article: Home Page Setting Changes Unexpectedly, or You Cannot Change Your Home Page Setting, Article ID 320159.

Technical Details