BKDR_CHOSZ.AB

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 malware/grayware files:

1. Search for the following files:
   
   • {All User's Profile}\Application Data\mspool.dll
   • %User Temp%\1.rtf
   
   Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
2. Once located, select the file then press SHIFT+DELETE to permanently delete the file.
3. Repeat the said steps for all files listed.

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_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services
3. Still in the left panel, locate and delete the key:
   mspool
4. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>Classes
5. Still in the left panel, locate and delete the key:
   SS
6. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software
7. Still in the left panel, locate and delete the key:
   WinRAR SFX
8. Close Registry Editor.

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 and 7:
     Click the Start button, type REGEDIT in the Search input field then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_CONFIG>Software>Microsoft>Windows>CurrentVersion>Internet Settings
3. In the right panel, locate the registry value:
   ProxyEnable = "0"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   ProxyEnable = "1"
5. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>SvcHost
6. In the right panel, locate the registry value:
   LocalService = "{Default values} mspool"
7. Right-click on the value name and choose Modify. Change the value data of this entry to:
   LocalService = "{Default values}"
8. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Internet Settings>Cache>Paths
9. In the right panel, locate the registry value:
   Directory = "%System Root%\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5"
10. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Directory = "%Temporary Internet Files%\Content.IE5"
11. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Internet Settings>Cache>Paths>path1
12. In the right panel, locate the registry value:
    CachePath = "%System Root%\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache1"
13. Right-click on the value name and choose Modify. Change the value data of this entry to:
    CachePath = "%Temporary Internet Files%\Content.IE5\Cache1
14. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Internet Settings>Cache>Paths>path2
15. In the right panel, locate the registry value:
    CachePath = "%System Root%\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
16. Right-click on the value name and choose Modify. Change the value data of this entry to:
    CachePath = "%Temporary Internet Files%\Content.IE5\Cache2"
17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Internet Settings>Cache>Paths>path3
18. In the right panel, locate the registry value:
    CachePath = "%System Root%\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache3"
19. Right-click on the value name and choose Modify. Change the value data of this entry to:
    CachePath = "%Temporary Internet Files%\Content.IE5\Cache3"
20. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Internet Settings>Cache>Paths>path4
21. In the right panel, locate the registry value:
    CachePath = "%System Root%\Documents and Settings\LocalService\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
22. Right-click on the value name and choose Modify. Change the value data of this entry to:
    CachePath = "%Temporary Internet Files%\Content.IE5\Cache4"
23. In the left panel, double-click the following:
    HKEY_USERS>.DEFAULT>Software>Microsoft>Windows>CurrentVersion>Explorer>Shell Folders
24. In the right panel, locate the registry value:
    Cookies = "%System Root%\Documents and Settings\LocalService\Cookies"
25. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Cookies = "%System Root%\Documents and Settings\NetworkService\Cookies"
26. Again In the right panel, locate the registry value:
    Cache = "%System Root%\Documents and Settings\LocalService\Local Settings\Temporary Internet Files"
27. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Cache = "%System Root%\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files"
28. Again In the right panel, locate the registry value:
    History = "%System Root%\Documents and Settings\LocalService\Local Settings\History"
29. Right-click on the value name and choose Modify. Change the value data of this entry to:
    History = "%System Root%\Documents and Settings\NetworkService\Local Settings\History"
30. Close Registry Editor.