WORM_RUCTO.BH

To restart in Safe Mode:

• For Windows 2000 users

1. Restart your computer.
2. Press F8 when you see the Starting Windows bar at the bottom of the screen.
3. Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.

• For Windows XP users

1. Restart your computer.
2. Press F8 after the Power-On Self Test (POST) routine is done. If the Windows Advanced Options menu does not appear, try restarting then pressing F8 several times when the POST screen appears.
3. Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.

• For Windows Server 2003 users

1. Restart your computer.
2. Press F8 after Windows starts up. If the Windows Advanced Options menu does not appear, try restarting again and pressing F8 several times afterward.
3. On the Windows Advanced Option menu, use the arrow keys to select Safe Mode then press Enter.

• For Windows Vista and Windows 7 users

1. Restart your computer.
2. Press F8 after the Power-On Self Test (POST) routine is done. If the Advanced Boot Options menu does not appear, try restarting and then pressing F8 several times after the POST screen is displayed.
3. On the Advanced Boot Options menu, use the arrow keys to select the Safe Mode option, and then press Enter.

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>Internet Explorer>Download
3. In the right panel, locate the registry value:
   CheckExeSignatures = "no"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   CheckExeSignatures = "yes"
5. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>Advanced
6. In the right panel, locate the registry value:
   Hidden = "2"
7. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Hidden = "1"
8. Again In the right panel, locate the registry value:
   HideFileExt = "1"
9. Right-click on the value name and choose Modify. Change the value data of this entry to:
   HideFileExt = "0"
10. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Security Center
11. In the right panel, locate the registry value:
    AntiVirusDisableNotify = "1"
12. Right-click on the value name and choose Modify. Change the value data of this entry to:
    AntiVirusDisableNotify = "0"
13. Again In the right panel, locate the registry value:
    FirewallDisableNotify = "1"
14. Right-click on the value name and choose Modify. Change the value data of this entry to:
    FirewallDisableNotify = "0"
15. Again In the right panel, locate the registry value:
    UpdatesDisableNotify = "1"
16. Right-click on the value name and choose Modify. Change the value data of this entry to:
    UpdatesDisableNotify = "0"
17. Again In the right panel, locate the registry value:
    AntiVirusOverride = "1"
18. Right-click on the value name and choose Modify. Change the value data of this entry to:
    AntiVirusOverride = "0"
19. Again In the right panel, locate the registry value:
    FirewallOverride = "1"
20. Right-click on the value name and choose Modify. Change the value data of this entry to:
    FirewallOverride = "0"
21. Close Registry Editor.

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. If the preceding step requires you to restart in safe mode, you may proceed to #2.
2. Open Registry Editor. To do this, click Start>Run, type REGEDIT in the text box provided, then press Enter.
3. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CLASSES_ROOT>Applications
4. Still in the left panel, locate and delete the key:
   Beholder.exe
5. Again Still in the left panel, locate and delete the key:
   NatGat_.exe
6. Again Still in the left panel, locate and delete the key:
   Nicrosoft.exe
7. Again Still in the left panel, locate and delete the key:
   regss.exe
8. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CLASSES_ROOT>CLSID
9. Still in the left panel, locate and delete the key:
   {7950420A-108E-4523-816D-7726B0D38BEC}
10. In the left panel of the Registry Editor window, double-click the following:
    HKEY_CURRENT_USER>Software
11. Still in the left panel, locate and delete the key:
    Beholder
12. Again Still in the left panel, locate and delete the key:
    MSDOS
13. In the left panel of the Registry Editor window, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Windows NT>CurrentVersion
14. Still in the left panel, locate and delete the key:
    AppCompatFlags
15. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Security Center
16. Still in the left panel, locate and delete the key:
    Svc
17. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer>Browser Helper Objects
18. Still in the left panel, locate and delete the key:
    {7950420A-108E-4523-816D-7726B0D38BEC}
19. Close Registry Editor.

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:
   mp = "%System%\Mplayer2.exe"
4. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>Download
5. In the right panel, locate and delete the entry:
   RunInvalidSignatures = "1"
6. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Policies>Associations
7. In the right panel, locate and delete the entry:
   LowRiskFileTypes = ".exe;.bat;.com;.cmd;"
8. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Policies>Attachments
9. In the right panel, locate and delete the entry:
   SaveZoneInformation = "1"
10. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Security Center
11. In the right panel, locate and delete the entry:
    UACDisableNotify = "1"
12. Again In the right panel, locate and delete the entry:
    AutoUpdateDisableNotify = "1"
13. Again In the right panel, locate and delete the entry:
    InternetSettingsDisableNotify = "1"
14. Again In the right panel, locate and delete the entry:
    UpdatesOverride = "1"
15. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Security Center>Svc
16. In the right panel, locate and delete the entry:
    UACDisableNotify = "1"
17. Again In the right panel, locate and delete the entry:
    AntiVirusDisableNotify = "1"
18. Again In the right panel, locate and delete the entry:
    FirewallDisableNotify = "1"
19. Again In the right panel, locate and delete the entry:
    AntiVirusOverride = "1"
20. Again In the right panel, locate and delete the entry:
    FirewallOverride = "1"
21. Again In the right panel, locate and delete the entry:
    UpdatesDisableNotify = "1"
22. Again In the right panel, locate and delete the entry:
    UpdatesOverride = "1"
23. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>policies>EXT>CLSID
24. In the right panel, locate and delete the entry:
    {7950420A-108E-4523-816D-7726B0D38BEC} = "1"
25. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>policies>system
26. In the right panel, locate and delete the entry:
    EnableLUA = "0"
27. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>MRT
28. In the right panel, locate and delete the entry:
    DontReportInfectionInformation = "1"
29. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Policies>Microsoft>Windows Defender
30. In the right panel, locate and delete the entry:
    DisableAntiSpyware = "1"
31. Close Registry Editor.

To manually delete a malware/grayware file from an affected system:

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

1. Right-click Start then click Search....
2. In the left panel, click All Files.
3. In the Named input box, type the following:
   %System%\mac.cpl
   %System%\rEvents.dll
4. In the Look In drop-down list, select My Computer then press Enter.
5. Once located, select the file then press SHIFT+DELETE to delete it.

• For Windows Vista and Windows 7 users:

1. Click Start>Computer.
2. In the Search input box, type the following:
   %System%\mac.cpl
   %System%\rEvents.dll
3. Once located, select the file then press SHIFT+DELETE to delete it.
   *Note: Read the following Microsoft page if these steps do not work on Windows 7.