TROJ_DADOBRA.VTH

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 delete the registry key this malware/grayware created:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Ext>Settings
3. Still in the left panel, locate and delete the key:
   e7b1b609-19ad-40a4-a288-b300d308746a
4. In the left panel, double-click the following:
   HKEY_CLASSES_ROOT>CLSID
5. Still in the left panel, locate and delete the key:
   e7b1b609-19ad-40a4-a288-b300d308746a
6. In the left panel, double-click the following:
   HKEY_CLASSES_ROOT>CLSID>e7b1b609-19ad-40a4-a288-b300d308746a
7. Still in the left panel, locate and delete the key:
   Implemented Categories
8. In the left panel, double-click the following:
   HKEY_CLASSES_ROOT>CLSID>e7b1b609-19ad-40a4-a288-b300d308746a>Implemented Categories
9. Still in the left panel, locate and delete the key:
   {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
10. Again Still in the left panel, locate and delete the key:
    InprocServer32
11. In the left panel, double-click the following:
    HKEY_CLASSES_ROOT>CLSID>e7b1b609-19ad-40a4-a288-b300d308746a>InprocServer32
12. Still in the left panel, locate and delete the key:
    1.0.0.0
13. Again Still in the left panel, locate and delete the key:
    ProgId
14. Again Still in the left panel, locate and delete the key:
    {e7b1b609-19ad-40a4-a288-b300d308746a}
15. In the left panel, double-click the following:
    HKEY_CLASSES_ROOT
16. Still in the left panel, locate and delete the key:
    Internet_Explorer_Security.BHO
17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>Internet_Explorer_Security.BHO
18. Still in the left panel, locate and delete the key:
    CLSID
19. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID
20. Still in the left panel, locate and delete the key:
    {E7B1B609-19AD-40A4-A288-B300D308746A}
21. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{E7B1B609-19AD-40A4-A288-B300D308746A}
22. Still in the left panel, locate and delete the key:
    InprocServer32
23. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{E7B1B609-19AD-40A4-A288-B300D308746A}>InprocServer32
24. Still in the left panel, locate and delete the key:
    1.0.0.0
25. Again Still in the left panel, locate and delete the key:
    ProgId
26. Again Still in the left panel, locate and delete the key:
    Implemented Categories
27. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{E7B1B609-19AD-40A4-A288-B300D308746A}>Implemented Categories
28. Still in the left panel, locate and delete the key:
    {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
29. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>Component Categories
30. Still in the left panel, locate and delete the key:
    {62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
31. Close Registry Editor.

To delete the registry value this malware/grayware created:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   Win Loader = "%Application Data%\TWTask\WinLoader.exe"
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Ext>Settings>e7b1b609-19ad-40a4-a288-b300d308746a
5. In the right panel, locate and delete the entry:
   Flags = "0"
6. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>e7b1b609-19ad-40a4-a288-b300d308746a>InprocServer32
7. In the right panel, locate and delete the entry:
   ThreadingModel = "Both"
8. Again In the right panel, locate and delete the entry:
   Class = "InternetExplorerSecurity.BHO"
9. Again In the right panel, locate and delete the entry:
   Assembly = "InternetExplorerSecurity.BHO, Version
10. Again In the right panel, locate and delete the entry:
    RuntimeVersion = "v2.0.50727"
11. Again In the right panel, locate and delete the entry:
    CodeBase = "file:///%System Root%/Program Files/Twitter/Internet_Security.dll"
12. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>e7b1b609-19ad-40a4-a288-b300d308746a>InprocServer32>1.0.0.0
13. In the right panel, locate and delete the entry:
    Class = "InternetExplorerSecurity.BHO"
14. Again In the right panel, locate and delete the entry:
    Assembly = "InternetExplorerSecurity.BHO, Version
15. Again In the right panel, locate and delete the entry:
    RuntimeVersion = "v2.0.50727"
16. Again In the right panel, locate and delete the entry:
    CodeBase = "file:///%System Root%/Program Files/Twitter/Internet_Security.dll"
17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer>Browser Helper Objects>e7b1b609-19ad-40a4-a288-b300d308746a
18. In the right panel, locate and delete the entry:
    Alright = "1"
19. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Ext>Settings>{e7b1b609-19ad-40a4-a288-b300d308746a}
20. In the right panel, locate and delete the entry:
    Flags = "0"
21. Again In the right panel, locate and delete the entry:
    Version = "*"
22. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{E7B1B609-19AD-40A4-A288-B300D308746A}>InprocServer32
23. In the right panel, locate and delete the entry:
    ThreadingModel = "Both"
24. Again In the right panel, locate and delete the entry:
    Class = "Internet_Explorer_Security.BHO"
25. Again In the right panel, locate and delete the entry:
    Assembly = "Internet_Explorer_Security, Version
26. Again In the right panel, locate and delete the entry:
    RuntimeVersion = "v2.0.50727"
27. Again In the right panel, locate and delete the entry:
    CodeBase = "{random characters}"
28. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{E7B1B609-19AD-40A4-A288-B300D308746A}>InprocServer32>1.0.0.0
29. In the right panel, locate and delete the entry:
    Class = "Internet_Explorer_Security.BHO"
30. Again In the right panel, locate and delete the entry:
    Assembly = "Internet_Explorer_Security, Version
31. Again In the right panel, locate and delete the entry:
    RuntimeVersion = "v2.0.50727"
32. Again In the right panel, locate and delete the entry:
    CodeBase = "{random characters}"
33. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>Component Categories>{62C8FE65-4EBB-45e7-B440-6E39B2CDBF29}
34. In the right panel, locate and delete the entry:
    0 = ".NET Category"
35. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer>Browser Helper Objects>{e7b1b609-19ad-40a4-a288-b300d308746a}
36. In the right panel, locate and delete the entry:
    Alright = "1"
37. Close Registry Editor.

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

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

1. Right-click Start then click Search....
2. In the Named input box, type:
   
   • %Windows%\Microsoft.NET\Framework\v2.0.50727\Internet_Security.dll
   • %Windows%\Microsoft.NET\Framework\v2.0.50727\Interop.SHDocVw.dll.dll
   • %Program Files%\Twitter\Internet_Security.dll
   • %Program Files%\Twitter\Interop.SHDocVw.dll.dll
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.

• For Windows Vista and Windows 7 users:

1. Click Start>Computer.
2. In the Search input box, type:
   
   • %Windows%\Microsoft.NET\Framework\v2.0.50727\Internet_Security.dll
   • %Windows%\Microsoft.NET\Framework\v2.0.50727\Interop.SHDocVw.dll.dll
   • %Program Files%\Twitter\Internet_Security.dll
   • %Program Files%\Twitter\Interop.SHDocVw.dll.dll
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 delete the malware/grayware folder:

1. Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
2. In the Named input box, type:
   
   • %Program Files%\Twitter
3. In the Look In drop-down list, select My Computer, then press Enter.
4. Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.