TROJ_DOWNLOADER.A

To enable Registry Editor, Task Manager, and Folder options:

1. Open Notepad. To do this:
   
   • For Windows 2000, XP, and Server 2003 users:
     Click Start>Run, type Notepad in the text box provided, then press Enter.
   • For Windows Vista, 7, and Server 2008 users:
     Click start. Type Notepad , then press Enter.
   • For Windows 8, 8.1, and 2012 users:
     Right-click on the lower left corner of the screen. Click Run. Type Notepad in the input field, then press Enter.
2. Copy and paste the following script:
   On Error Resume Next Set shl = WScript.CreateObject("WScript.Shell") shl.RegDelete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools" shl.RegDelete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools" shl.RegDelete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr" shl.RegDelete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableTaskMgr" shl.RegDelete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions" shl.RegDelete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoFolderOptions"
3. Save this file as C:\RESTORE.VBS.
4. Run C:\RESTORE.VBS by double-clicking on the file.
5. Click Yes at the prompt of the message box to execute the .VBS file.

To delete the registry key this malware/grayware created:

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_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Policies>Explorer
3. Still in the left panel, locate and delete the key:
   run
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>SOFTWARE>Policies>Microsoft>Internet Explorer
5. Still in the left panel, locate and delete the key:
   Control Panel
6. Close Registry Editor.

To delete the registry value this malware/grayware created:

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>SOFTWARE>Microsoft>Windows>CurrentVersion>policies>system
3. In the right panel, locate and delete the entry:
   EnableLUA = "0"
4. Again In the right panel, locate and delete the entry:
   ConsentPromptBehaviorAdmin = "0"
5. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings
6. In the right panel, locate and delete the entry:
   AutoConfigURL = "file://%User Profile%\javau.n"
7. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Policies>Microsoft>Internet Explorer>Control Panel
8. In the right panel, locate and delete the entry:
   Connection Settings = "1"
9. 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, 7, and Server 2008:
     Click the Start button, type REGEDIT in the Search input field then press Enter.
   • On Windows 8, 8.1, and Server 2012:
     Right-click on the lower left corner of the screen and click Run, type REGEDIT in the Run input field, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings>Connections
3. In the right panel, locate the registry value:
   DefaultConnectionSettings = "{random values}"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   DefaultConnectionSettings = "{random values}"
5. Again In the right panel, locate the registry value:
   SavedLegacySettings = "{random values}"
6. Right-click on the value name and choose Modify. Change the value data of this entry to:
   SavedLegacySettings = "{random values}"
7. 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 Profile%\Application Data\winntservice.vbs
   • %User Temp%\flager
   • %User Profile%\addon.exe
   • %User Profile%\Application Data\temp.txt
   • %User Temp%\4941.tmp
   • %User Profile%\javau.n
   • %User Profile%\Application Data\WinNtService.vbs
   • %User Temp%\t.reg
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 Profile%\Application Data\winntservice.vbs
   • %User Temp%\flager
   • %User Profile%\addon.exe
   • %User Profile%\Application Data\temp.txt
   • %User Temp%\4941.tmp
   • %User Profile%\javau.n
   • %User Profile%\Application Data\WinNtService.vbs
   • %User Temp%\t.reg
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.