TROJ_CRYPWALL.XXRV

To delete registry keys this malware/grayware created:

1. Open Registry Editor. To do this:
   » For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
   » For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
2. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software
3. Still in the left panel, locate and delete the key:
   {Random Characters}
4. Close Registry Editor.

To delete the registry value this malware created:

1. Open Registry Editor. To do this:
   » For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
   » For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and 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:
   {Random Characters} = "%System Root%\{Random Characters}\{Random Characters}.exe"
4. Again In the right panel, locate and delete the entry:
   {Random Characters} = "%Application Data%\{Random Characters}.exe"
5. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>RunOnce (For Windows Vista or higher)
6. In the right panel, locate and delete the entry:
   *{Random Characters} = "%System Root%\{Random Characters}\{Random Characters}.exe"
7. Again In the right panel, locate and delete the entry:
   *{Random Characters} = "%Application Data%\{Random Characters}.exe"
8. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>{Random Characters}
9. In the right panel, locate and delete the entry:
   {Random 2 characters} = "{contents of HELP_DECRYPT.URL}"
10. Again In the right panel, locate and delete the entry:
    {Random 2 characters} = "{contents of HELP_DECRYPT.TXT}"
11. Again In the right panel, locate and delete the entry:
    {Random 2 characters} = "{contents of HELP_DECRYPT.HTML}"
12. Again In the right panel, locate and delete the entry:
    {Random 2 characters} = "{random value}"
13. In the left panel of the Registry Editor window, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>SystemRestore
14. In the right panel, locate and delete the entry:
    DisableSR = "1"
15. Close Registry Editor.

To restore the registry value this malware/grayware modified:

1. Open Registry Editor.
   » For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
   » For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>Wersvc - (for Windows Vista or higher)
3. In the right panel, locate the registry value:
   Start = "4"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Start = "3"
5. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>ERrsvc - (for Windows XP and lower)
6. In the right panel, locate the registry value:
   Start = "4"
7. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Start = "3"
8. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>BITS
9. In the right panel, locate the registry value:
   Start = "4"
10. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start = "3"
11. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>wuauserv
12. In the right panel, locate the registry value:
    Start = "4"
13. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start = "2"
14. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>wscsvc
15. In the right panel, locate the registry value:
    Start = "4"
16. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start = "2"
17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>services>WinDefend
18. In the right panel, locate the registry value:
    Start = "4"
19. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start = "2"
20. 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 File name* input box, type the following:
   
   • %User Startup%\HELP_DECRYPT.HTML
   • %User Startup%\HELP_DECRYPT.PNG
   • %User Startup%\HELP_DECRYPT.TXT
   • %User Startup%\HELP_DECRYPT.URL
   • %Desktop%\HELP_DECRYPT.HTML
   • %Desktop%\HELP_DECRYPT.PNG
   • %Desktop%\HELP_DECRYPT.TXT
   • %Desktop%\HELP_DECRYPT.URL
   • {Drives Root Directory}\HELP_DECRYPT.HTML
   • {Drives Root Directory}\HELP_DECRYPT.PNG
   • {Drives Root Directory}\HELP_DECRYPT.TXT
   • {Drives Root Directory}\HELP_DECRYPT.URL
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.
   *Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

1. Open a Windows Explorer window.
   • For Windows Vista, 7, and Server 2008 users, click Start>Computer.
   • For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
2. In the Search Computer/This PC input box, type:
   
   • %User Startup%\HELP_DECRYPT.HTML
   • %User Startup%\HELP_DECRYPT.PNG
   • %User Startup%\HELP_DECRYPT.TXT
   • %User Startup%\HELP_DECRYPT.URL
   • %Desktop%\HELP_DECRYPT.HTML
   • %Desktop%\HELP_DECRYPT.PNG
   • %Desktop%\HELP_DECRYPT.TXT
   • %Desktop%\HELP_DECRYPT.URL
   • {Drives Root Directory}\HELP_DECRYPT.HTML
   • {Drives Root Directory}\HELP_DECRYPT.PNG
   • {Drives Root Directory}\HELP_DECRYPT.TXT
   • {Drives Root Directory}\HELP_DECRYPT.URL
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.

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:
   
    
   • %System Root%\{Random Characters}
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.