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PUA.MediaCodec

PUA.MediaCodec

Updated:
October 13, 2016
Infection Length:
Varies
Name:
Media Player Codec Pack
Version:
4.4.0
Publisher:
Media Player Codec Pack
Risk Impact:
Low
Systems Affected:
Windows

Behavior

PUA.MediaCodec is a potentially unwanted application that changes browser settings with user consent, but does not revert to the default settings after uninstallation.

Antivirus Protection Dates

  • Initial Rapid Release version October 12, 2016 revision 006
  • Latest Rapid Release version January 18, 2017 revision 017
  • Initial Daily Certified version October 12, 2016 revision 008
  • Latest Daily Certified version January 18, 2017 revision 022
  • Initial Weekly Certified release date October 19, 2016
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
When the application is installed, it creates the following files:
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs\Startup\CodecPackTrayMenu.lnk
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Codec Settings.lnk
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Helpful Resources\Clone Copy Protected CD's.url
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Helpful Resources\Clone Copy Protected DVD's.url
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Helpful Resources\Play any Copy Protected Disc.url
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Media Player Classic.lnk
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Package Homepage.url
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs \Media Player - Codec Pack\Uninstall.lnk

Next, the application creates the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_player_mpc" ="1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_ffdshow" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_lavvid" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\u_lav: "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_flashflv" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_xvidenc" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_x264enc" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_lagaenc" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_ac3filter" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_lavaud" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_divxacm" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_madflac" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_dspworx" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_haalisp" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_lavsplit" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_vsfilt" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_cdxare" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"DisplayName" = "Media Player Codec Pack 4.4.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"Version" = "4.4.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"VersionMajor" = "4"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"VersionMinor" = "4"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"DisplayVersion" = "4.4.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"Publisher" = "Media Player Codec Pack"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"URLInfoAbout" = "http://www.mediaplayercodecpack.com/"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"UninstallString" = "C:\WINDOWS\system32\Codecs\Uninst.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"DisplayIcon" = "%Windir%\Codecs\MPCP.ico,0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_codecsettings" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_updatechecker" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Media Player - Codec Pack\"u_traymenu" = "1"

The application asks the user to change their default home page and search engine. After the application is uninstalled, the home page and search engine settings are not restored.

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 LiveUpdate™ 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.