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PUA.WinterSoftInstaller

PUA.WinterSoftInstaller

Updated:
June 26, 2015
Name:
Installer For WinterSoft
Version:
2013.10.31.1157
Publisher:
WinterSoft
Risk Impact:
Medium
Systems Affected:
Windows

Behavior

PUA.WinterSoftInstaller is a potentially unwanted application that downloads and installs software without user consent.

Note: Virus definitions dated June 26, 2015 or earlier detect this threat as WinterSoftInstaller.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version September 22, 2016 revision 024
  • Initial Daily Certified version November 12, 2013 revision 020
  • Latest Daily Certified version September 22, 2016 revision 025
  • Initial Weekly Certified release date November 13, 2013
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
When the program is installed, it creates the following files:
  • %ProgramFiles%\EZDownloader\EZDownloader.Core.dll
  • %ProgramFiles%\EZDownloader\EZDownloader.exe
  • %ProgramFiles%\EZDownloader\EZDownloader.exe.config
  • %ProgramFiles%\EZDownloader\EZDownloader.Extension.dll
  • %ProgramFiles%\EZDownloader\EZDownloader.Spider.dll
  • %ProgramFiles%\EZDownloader\ICSharpCode.SharpZipLib.dll
  • %ProgramFiles%\EZDownloader\Interop.SHDocVw.dll
  • %ProgramFiles%\EZDownloader\TabStrip.dll
  • %ProgramFiles%\EZDownloader\unins000.dat
  • %ProgramFiles%\EZDownloader\unins000.exe
  • %ProgramFiles%\SearchNewTab\GqrqgA4zqE.dat
  • %ProgramFiles%\SearchNewTab\GqrqgA4zqE.dll
  • %ProgramFiles%\SearchNewTab\GqrqgA4zqE.tlb
  • %ProgramFiles%\SearchNewTab\GqrqgA4zqE.x64.dll
  • %ProgramFiles%\Sk-Enhancer\psupport.dll
  • %ProgramFiles%\Sk-Enhancer\uninstall.exe
  • %ProgramFiles%\surf aand! keep\kbHO1t.dat
  • %ProgramFiles%\surf aand! keep\kbHO1t.dll
  • %ProgramFiles%\surf aand! keep\kbHO1t.tlb
  • %ProgramFiles%\surf aand! keep\kbHO1t.x64.dll
  • %ProgramFiles%\WebSearch\sprotector.dll
  • %ProgramFiles%\WebSearch\uninstall.exe
  • %ProgramFiles%\YoutubeAdblocker\mU.dat
  • %ProgramFiles%\YoutubeAdblocker\mU.dll
  • %ProgramFiles%\YoutubeAdblocker\mU.tlb
  • %ProgramFiles%\YoutubeAdblocker\mU.x64.dll

The program creates the following registry subkeys:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\and!
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Kueepp
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Kueepp\CLSID
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Kueepp\CurVer
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Kueepp.2.19
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Kueepp.2.19\CLSID
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Kueepp.sourff
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SearchNewTab.SearchNewTab
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SearchNewTab.SearchNewTab\CLSID
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SearchNewTab.SearchNewTab\CurVer
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SearchNewTab.SearchNewTab.1.0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SearchNewTab.SearchNewTab.1.0\CLSID
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\sourff
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YoutubeAdblocker.YoutubeAdblocker
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YoutubeAdblocker.YoutubeAdblocker\CLSID
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YoutubeAdblocker.YoutubeAdblocker\CurVer
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YoutubeAdblocker.YoutubeAdblocker.1.0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\YoutubeAdblocker.YoutubeAdblocker.1.0\CLSID
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\SearchScopes\{BB74DE59-BC4C-4172-9AC4-73315F71CFFE}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1458DCF5-1B5F-66D7-95A3-E3D6D06D9023}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4BFC4F9E-AE60-6098-6AD8-44F45107A1C0}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{ECDEC2C8-F1B1-80C6-0D5A-64BA9C37FC13}
  • HKEY_LOCAL_MACHINE\SOFTWARE\Sk-Enhancer
  • HKEY_LOCAL_MACHINE\SOFTWARE\Sk-Enhancer\1943217956
  • HKEY_LOCAL_MACHINE\SOFTWARE\Sk-Enhancer\1943217956\NP6yu5+tnZZH0OQIKE1/gD3hJMqT/
  • HKEY_LOCAL_MACHINE\SOFTWARE\SP Global
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\info
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_b0285714
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_b0285714\0caebbe2
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_b0285714\2038a74d
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_b0285714\7fe0f877
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_b0285714\eae10f9d
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_d5615630
  • HKEY_LOCAL_MACHINE\SOFTWARE\SProtector\_d5615630\eae10f9d
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\Microsoft\Internet Explorer\SearchScopes\{BB74DE59-BC4C-4172-9AC4-73315F71CFFE}
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\Microsoft\Internet Explorer\ApprovedExtensionsMigration
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\Microsoft\Internet Explorer\ApprovedExtensionsMigration\{ECDEC2C8-F1B1-80C6-0D5A-64BA9C37FC13}
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\Microsoft\Windows\ShellNoRoam\BagMRU\1\0\3\0\1\0\0
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\Microsoft\Windows\ShellNoRoam\Bags\18
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\Microsoft\Windows\ShellNoRoam\Bags\18\Shell
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_b0285714
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_b0285714\0caebbe2
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_b0285714\2038a74d
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_b0285714\7fe0f877
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_b0285714\eae10f9d
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_d5615630
  • HKEY_USERS\S-1-5-21-1172441840-534431857-1906119351-500\Software\AppDataLow\SProtector\_d5615630\eae10f9d

The program modifies the following registry entry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page: "http://websearch.search-guide.info/?pid=711&r=2013/11/12&hid=10555473032077484198&lg=EN&cc=KR&unqvl=40"

The program then installs software without full user consent, including the following:
  • EZDownloader
  • SearchNewTab
  • SeUrf and keePa
  • SK-Enhancer
  • WebSearch
  • YoutubeAdblocker
  • SProtector

There is no visible presence of the programs after installation is complete.

After installation, the browser homepage and default search engine may be changed.

    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.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.