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Yontoo

Summary

Updated: May 30, 2012 3:38:15 PM
Type: Potentially Unwanted App
Name: UpToDown
Version: N/A
Publisher: Media Ingea SL
Risk Impact: Low
Systems Affected: Windows 98, Windows 95, Windows XP, Windows Me, Windows Vista, Windows NT, Windows Server 2003, Windows 2000

Behavior

Yontoo is a potentially unwanted application that installs a browser extension to display advertisements which appear to be from Facebook.

Antivirus Protection Dates

  • Initial Rapid Release version May 29, 2012 revision 018
  • Latest Rapid Release version May 29, 2012 revision 018
  • Initial Daily Certified version May 29, 2012 revision 019
  • Latest Daily Certified version May 29, 2012 revision 019
  • Initial Weekly Certified release date pending

Technical Details

Updated: May 30, 2012 3:38:15 PM
Type: Potentially Unwanted App
Name: UpToDown
Version: N/A
Publisher: Media Ingea SL
Risk Impact: Low
Systems Affected: Windows 98, Windows 95, Windows XP, Windows Me, Windows Vista, Windows NT, Windows Server 2003, Windows 2000
This potentially unwanted application must be downloaded and executed manually. It may also arrive bundled with other software.

When the program is executed, it creates the following files:
  • %Temp%\YontooFFClient.xpi
  • %Temp%\YontooIEClient.dll
  • %Temp%\YontooLayers.crx
  • %Temp%\YontooLayers.pem
  • %Temp%\YontooSetup-Silent.exe
  • %ProgramFiles%\Yontoo Layers Runtime\YontooIEClient.dll

Next, it creates the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\YontooIEClient.DLL\"AppID" = "{CFDAFE39-20CE-451D-BD45-A37452F39CF0}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{CFDAFE39-20CE-451D-BD45-A37452F39CF0}\"Default" = "YontooIEClient"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{FC1DD4E4-688F-4E9B-BAE5-BFB6A956AE51}\{DE3B7BF9-0770-4104-BC0B-B1CCCCE2F053}"Default" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{F5F971A9-DBF8-4EEC-81E3-5F1660573E6C}\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"Default" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{B6783DFA-B8C8-4CB6-AB9F-EF1A1F7F7AE8}\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"Default" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{A8F0AD53-1AEE-447E-89CD-71C325796F84}\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"Default" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{9D9785E5-3424-40B6-A287-BA143AD53109}\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"Default" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Components\{9307081B-7444-494C-8CF6-2FA7C0E92BFB}\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}"Default" = "1"

It also creates the following registry subkeys:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{DF7770F7-832F-4BDF-B144-100EDDD0C3AE}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FE9271F2-6EFD-44b0-A826-84C829536E93}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{10DE7085-6A1E-4D41-A7BF-9AF93E351401}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1AD27395-1659-4DFF-A319-2CFA243861A5}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{D372567D-67C1-4B29-B3F0-159B52B3E967}\1.0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Api
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Api.1
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Layers
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YontooIEClient.Layers.1
  • HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions\niapdbllcanepiiimjjndipklodoedlc
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FD72061E-9FDE-484D-A58A-0BAB4151CAD8}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Products\{DE3B7BF9-0770-4104-BC0B-B1CCCCE2F053}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Tarma Installer\Products\{889DF117-14D1-44EE-9F31-C5FB5D47F68B}

The program will then install PageRage, a browser extension that modifies the skin layout of Facebook but also displays advertisements which appear to be from Facebook.

Removal

Updated: May 30, 2012 3:38:15 PM
Type: Potentially Unwanted App
Name: UpToDown
Version: N/A
Publisher: Media Ingea SL
Risk Impact: Low
Systems Affected: Windows 98, Windows 95, Windows XP, Windows Me, Windows Vista, Windows NT, Windows Server 2003, Windows 2000
You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan. If that does not resolve the problem you can try one of the options available below.



FOR NORTON USERS
If you are a Norton product user, we recommend you try the following resources to remove this risk.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD.


How to reduce the risk of infection
The following resources provide further information and best practices to help reduce the risk of infection.


FOR BUSINESS USERS
If you are a Symantec business product user, we recommend you try the following resources to remove this risk.

Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdateâ„¢ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.


Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD.


How to reduce the risk of infection
The following resource provides further information and best practices to help reduce the risk of infection.
Protecting your business network



MANUAL REMOVAL
The following instructions pertain to all current Symantec antivirus products.

1. Performing a full system scan
How to run a full system scan using your Symantec product


2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.

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