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PUA.DefaultTab

PUA.DefaultTab

Updated:
June 08, 2015
Name:
DefaultTab
Risk Impact:
Low
Systems Affected:
Windows

Behavior

PUA.DefaultTab is a potentially unwanted application that changes Internet browser settings.

Antivirus Protection Dates

  • Initial Rapid Release version October 24, 2014 revision 023
  • Latest Rapid Release version December 11, 2017 revision 022
  • Initial Daily Certified version October 24, 2014 revision 002
  • Latest Daily Certified version December 12, 2017 revision 001
  • Initial Weekly Certified release date October 29, 2014
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
The application may come bundled with third-party installers.

When the application is executed, it creates the following files:
  • %ProgramFiles%\DefaultTab\DefaultTab.crx
  • %ProgramFiles%\DefaultTab\DefaultTabSearch.exe
  • %ProgramFiles%\DefaultTab\uid
  • %UserProfile%\Application Data\Google\Chrome\User Data\Default\Extension State\000021.ldb
  • %UserProfile%\Application Data\Google\Chrome\User Data\Default\Extension State\000022.log
  • %UserProfile%\Application Data\Google\Chrome\User Data\Default\Extension State\MANIFEST-000020
  • %UserProfile%\Application Data\Mozilla\Firefox\Profiles\esuurfjq.default\extensions\addon@defaulttab.com.xpi
  • %UserProfile%\Application Data\Mozilla\Firefox\Profiles\esuurfjq.default\search-metadata.json
  • %UserProfile%\Application Data\Mozilla\Firefox\Profiles\esuurfjq.default\searchplugins\search-here.xml
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\addon.ico
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabBHO.cfg
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabBHO.dll
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabStart.exe
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabStart64.exe
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabUninstaller.exe
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabWrap.dll
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabWrap64.dll
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DT.ico
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DTUpdate.exe
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\searchhere.ico
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\uninstalldt.exe

It also creates the following folder:
  • %UserProfile%\Application Data\Google\Chrome\User Data\Default\Extensions\kdidombaedgpfiiedeimiebkmbilgmlc\1.1.19_0

The application then creates the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\DefaultTabBHO.DLL\"AppID" = "{38495740-0035-4471-851E-F5BBB86AB085}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{38495740-0035-4471-851E-F5BBB86AB085}\"[DEFAULT]" = "DefaultTabBHO"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{72D89EBF-0C5D-4190-91FD-398E45F1D007}\"LocalService" = "DefaultTabUpdate"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7F6AFBF1-E065-4627-A2FD-810366367D01}\"[DEFAULT]" = "DefaultTab Browser Helper"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7F6AFBF1-E065-4627-A2FD-810366367D01}\InprocServer32\"[DEFAULT]" = "%UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabBHO.dll"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7F6AFBF1-E065-4627-A2FD-810366367D01}\InprocServer32\"ThreadingModel" = "Apartment"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7F6AFBF1-E065-4627-A2FD-810366367D01}\ProgID\"[DEFAULT]" = "DefaultTabBHO.DefaultTabBrowser.1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7F6AFBF1-E065-4627-A2FD-810366367D01}\TypeLib\"[DEFAULT]" = "{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{7F6AFBF1-E065-4627-A2FD-810366367D01}\VersionIndependentProgID\"[DEFAULT]" = "DefaultTabBHO.DefaultTabBrowser"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}\"[DEFAULT]" = "DefaultTabBrowserActiveX Class"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}\InprocServer32\"[DEFAULT]" = "%UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabBHO.dll"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}\InprocServer32\"ThreadingModel" = "Apartment"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}\ProgID\"[DEFAULT]" = "DefaultTabBHO.DefaultTabBrowserActiveX.1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}\TypeLib\"[DEFAULT]" = "{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}\VersionIndependentProgID\"[DEFAULT]" = "DefaultTabBHO.DefaultTabBrowserActiveX"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1F8EDE97-36D5-422A-B8F0-9406E2D87C60}\"[DEFAULT]" = "IDefaultTabBrowser"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1F8EDE97-36D5-422A-B8F0-9406E2D87C60}\ProxyStubClsid\"[DEFAULT]" = "{00020424-0000-0000-C000-000000000046}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1F8EDE97-36D5-422A-B8F0-9406E2D87C60}\ProxyStubClsid32\"[DEFAULT]" = "{00020424-0000-0000-C000-000000000046}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1F8EDE97-36D5-422A-B8F0-9406E2D87C60}\TypeLib\"[DEFAULT]" = "{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1F8EDE97-36D5-422A-B8F0-9406E2D87C60}\TypeLib\"Version" = "1.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{BE89FFB3-7F9C-4A16-B475-98B195A06628}\"[DEFAULT]" = "IDefaultTabBrowserActiveX"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{BE89FFB3-7F9C-4A16-B475-98B195A06628}\ProxyStubClsid\"[DEFAULT]" = "{00020424-0000-0000-C000-000000000046}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{BE89FFB3-7F9C-4A16-B475-98B195A06628}\ProxyStubClsid32\"[DEFAULT]" = "{00020424-0000-0000-C000-000000000046}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{BE89FFB3-7F9C-4A16-B475-98B195A06628}\TypeLib\"[DEFAULT]" = "{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{BE89FFB3-7F9C-4A16-B475-98B195A06628}\TypeLib\"Version" = "1.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}\1.0\"[DEFAULT]" = "DefaultTabBHO 1.0 Type Library"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}\1.0\0\win32\"[DEFAULT]" = "%UserProfile%\Application Data\DefaultTab\DefaultTab\DefaultTabBHO.dll"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}\1.0\FLAGS\"[DEFAULT]" = "0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{FEB62B15-CC00-4736-AAEC-BA046C9DFF73}\1.0\HELPDIR\"[DEFAULT]" = "%UserProfile%\Application Data\DefaultTab\DefaultTab"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowser\"[DEFAULT]" = "DefaultTab Browser Helper"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowser\CLSID\"[DEFAULT]" = "{7F6AFBF1-E065-4627-A2FD-810366367D01}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowser\CurVer\"[DEFAULT]" = "DefaultTabBHO.DefaultTabBrowser.1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowser.1\"[DEFAULT]" = "DefaultTab Browser Helper"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowser.1\CLSID\"[DEFAULT]" = "{7F6AFBF1-E065-4627-A2FD-810366367D01}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowserActiveX\"[DEFAULT]" = "DefaultTabBrowserActiveX Class"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowserActiveX\CLSID\"[DEFAULT]" = "{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowserActiveX\CurVer\"[DEFAULT]" = "DefaultTabBHO.DefaultTabBrowserActiveX.1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowserActiveX.1\"[DEFAULT]" = "DefaultTabBrowserActiveX Class"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\DefaultTabBHO.DefaultTabBrowserActiveX.1\CLSID\"[DEFAULT]" = "{A1E28287-1A31-4b0f-8D05-AA8C465D3C5A}"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions\kdidombaedgpfiiedeimiebkmbilgmlc\"path" = "%ProgramFiles%\DefaultTab\DefaultTab.crx"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions\kdidombaedgpfiiedeimiebkmbilgmlc\"version" = "1.1.19"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{B2D33ED6-EBBD-467C-BF6F-F175D9B51363}\"AppName" = "DefaultTabStart64.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{B2D33ED6-EBBD-467C-BF6F-F175D9B51363}\"AppPath" = "%UserProfile%\Application Data\DefaultTab\DefaultTab"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{B2D33ED6-EBBD-467C-BF6F-F175D9B51363}\"Policy" = "3"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{BAD84EE2-624D-4e7c-A8BB-41EFD720FD77}\"AppName" = "DefaultTabStart.exe"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{BAD84EE2-624D-4e7c-A8BB-41EFD720FD77}\"AppPath" = "%UserProfile%\Application Data\DefaultTab\DefaultTab"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{BAD84EE2-624D-4e7c-A8BB-41EFD720FD77}\"Policy" = "3"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7F6AFBF1-E065-4627-A2FD-810366367D01}\"[DEFAULT]" = "DefaultTabBHO"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7F6AFBF1-E065-4627-A2FD-810366367D01}\"NoExplorer" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Ext\"DisableAddonLoadTimePerformanceNotifications" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"Comments" = "Search Results, LLC all rights reserved"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"Contact" = "Search Results, LLC"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"DisplayName" = "DefaultTab"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"DisplayVersion" = "2.2.8.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"InstallLocation" = ""%UserProfile%\Application Data\DefaultTab\DefaultTab""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"Publisher" = "Search Results, LLC"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"NoModify" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"NoRepair" = "1"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DefaultTab\"UninstallString" = ""%UserProfile%\Application Data\DefaultTab\DefaultTab\uninstalldt.exe""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\"Version" = "2.2.8.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\"001" = "2.0.0.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\"003" = "1.1.19.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\"002" = "1.3.2.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\P\"01" = "6F0C6A3ED0142BD371684282125B2789"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\P\"02" = "9999"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\P\"03" = "255"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\P\"04" = ""
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\Update\"last_update_check" = "[HEXADECIMAL VALUE]"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Default Tab\Update\"ieVersion" = "1.3.2.0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"affid" = "9999"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"cfg" = "255"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"yw3i" = ""
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"defaultState" = "2"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"version" = "1.1.19"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"LastUpdateCheck" = "1413254569"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"keyword" = "google.com.sg"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"name" = "Google"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"homepage" = ""
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"addedsearchengines" = "|search here|facebook|amazon|wikipedia|twitter|ebay"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"UpdatePending" = "0"
  • HKEY_LOCAL_MACHINE\SOFTWARE\DefaultTab\ChromeExtension\"Status" = "3"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.tabsearchbox" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.newtabsearch" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.searchinnewtab" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.channel" = "9999"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.setdefaultsearch" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.sethomepage" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.overridekeywordsearch" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.forcekeywordsearch" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.overridechromesearch" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.yw3i" = ""
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.browser_version2" = "9.11.9600.17126"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.firstrun" = "false"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.firstSearch" = "true"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.keyword.URL" = "chrome://defaulttab/content/keywordURL.xul?"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.installedVersion" = "1.3.2"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.zsearch_engine" = "Google"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.browserID" = "6F0C6A3ED0142BD371684282125B2789"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.browser_version" = "11"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.DefaultScope" = "Bing"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\AppDataLow\Software\DefaultTab\BHO\"extensions.defaulttab.zREMDefaultScope" = "{0633EE93-D776-472f-A0FF-E1416B8B2E3A}"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\"{7F6AFBF1-E065-4627-A2FD-810366367D01}\" = "DefaultTabBHO"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\"{7F6AFBF1-E065-4627-A2FD-810366367D01}\NoExplorer" = "1"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\"Version" = "2.2.8.0"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\"001" = "2.0.0.0"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\"002" = "1.3.2.0"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\"003" = "1.1.19.0"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\Firefox\"browserID" = "6F0C6A3ED0142BD371684282125B2789"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\Firefox\"installedVersion" = "2.0"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\Firefox\"active.affiliate" = "270F"
  • HKEY_USERS\S-1-5-21-3598304965-2135194631-3668321749-1001\Software\Default Tab\Firefox\"firstrun" = "0"

The application then creates a service with the following properties:
Display name:
  • DefaultTabSearch
  • DefaultTabUpdate

Image path:
  • %ProgramFiles%\DefaultTab\DefaultTabSearch.exe
  • %UserProfile%\Application Data\DefaultTab\DefaultTab\DTUpdate.exe

Description:
  • DefaultTab Update Service

It then creates the following registry subkeys to register itself as a service:
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\DefaultTabSearch
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\DefaultTabSearch

The application acts as an Internet browser extension and may change the default homepage, search engine, and new tab settings of Internet Explorer, Firefox, and Chrome to point to the following location:
  • [http://]www.mysearchresults.com



The domain the application points to is an advertisement-supported search engine, and will display advertisements related to searched keywords.
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.