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Adware.BrowserAid

Adware.BrowserAid

Updated:
February 13, 2007
Publisher:
BrowserAid
Risk Impact:
Medium
File Names:
msiefr40.dll inetp60.dll stlb2.dll
Systems Affected:
Windows

Behavior


Adware.BrowserAid typically installs itself as a Browser Helper Object and may perform other actions, such as:

  • Redirecting search requests
  • Displaying advertising content
  • Updating itself


Symptoms


Files are detected as Adware.BrowserAid.

Behavior


The most common installation method for this adware is through Web sites.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version July 06, 2017 revision 006
  • Initial Daily Certified version June 06, 2004 revision 004
  • Latest Daily Certified version July 06, 2017 revision 008
  • Initial Weekly Certified release date June 09, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When executed Adware.BrowserAid may perform some or all of the following actions:
  1. May create some or all of the following files:

    • %System%\msiefr40.dll (detected as Adware.BrowserAid)
    • %System%\e6f1873b.dll (detected as Adware.BrowserAid)
    • %System%\stlb2.dll (detected as Adware.BrowserAid)
    • %System%\stlb2.xml
    • %Windir%\uptodate.exe (detected as Adware.BrowserAid)

      Note:
    • %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
    • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.

  2. May create one the following folders:

    • %UserProfile%\Application Data\{12EE7A5E-0674-42F9-A76B-000000004D00}
    • %UserProfile%\Application Data\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}

      Note: %UserProfile% is a variable that refers to the current user's profile folder. By default, this is C:\Documents and Settings\[Current User] (Windows NT/2000/XP).

  3. May create one or more of the following registry subkeys:

    HKEY_CLASSES_ROOT\AppID\{418B46A9-5343-4E1A-A654-42B04E3F869E}
    HKEY_CLASSES_ROOT\AppID\{87690003-2714-45E7-8A1B-DC0658DE778C}
    HKEY_CLASSES_ROOT\CLSID\{087173EF-9829-4F49-8340-A524177D3F60}
    HKEY_CLASSES_ROOT\CLSID\{0ddbb570-0396-44c9-986a-8f6f61a51c2f}
    HKEY_CLASSES_ROOT\CLSID\{12EE7A5E-0674-42f9-A76A-000000004D00}
    HKEY_CLASSES_ROOT\CLSID\{12EE7A5E-0674-42f9-A76B-000000004D00}
    HKEY_CLASSES_ROOT\CLSID\{337D0C1D-4053-4FAB-AF2B-45C2F7B0FAA6}
    HKEY_CLASSES_ROOT\CLSID\{5F5564AC-DE7A-4DCD-9296-32E71A35DCB6}
    HKEY_CLASSES_ROOT\CLSID\{606220AE-90E0-41CA-BF6D-C89272ED680C}
    HKEY_CLASSES_ROOT\CLSID\{80672997-D58C-4190-9843-C6C61AF8FE97}
    HKEY_CLASSES_ROOT\CLSID\{DBD7AAA2-1725-4663-8C8B-52A840693469}
    HKEY_CLASSES_ROOT\CLSID\{E004800A-73C6-4587-B855-98D0CE0C16B1}
    HKEY_CLASSES_ROOT\CLSID\{F20AE630-6DE2-43CA-A988-7CD40C36EF0B}
    HKEY_CLASSES_ROOT\Interface\{2A167E61-D100-450D-A1B0-6EAF394BCB87}
    HKEY_CLASSES_ROOT\Interface\{4A2563C7-FC68-4EE8-A11C-2022EBCC1B0F}
    HKEY_CLASSES_ROOT\Interface\{4B0FCEB7-8163-46EE-9EAF-85BD933D0A46}
    HKEY_CLASSES_ROOT\Interface\{670801FD-C247-4E44-9424-69E5D77C6725}
    HKEY_CLASSES_ROOT\Interface\{8A7D38BE-849D-478F-A7CF-55EC95722358}
    HKEY_CLASSES_ROOT\Interface\{E58F4168-608C-45C2-9BFF-061229730B2E}
    HKEY_CLASSES_ROOT\Interface\{EE06D877-386F-4A44-A9ED-75EB6C3E7E80}
    HKEY_CLASSES_ROOT\Interface\{EE06D877-386F-4A44-A9ED-75EB6C3E7E81}
    HKEY_CLASSES_ROOT\Interface\{F8D96098-E9F7-42E1-88F3-A3719D70EA8D}
    HKEY_CLASSES_ROOT\TypeLib\{12EE7A5E-0674-42F9-A76C-000000004D00}
    HKEY_CLASSES_ROOT\TypeLib\{7313BFD0-62C4-40F4-8041-3FBDBC80AC07}
    HKEY_CLASSES_ROOT\TypeLib\{85C2C2A1-3F20-4EAD-ADC3-BD3217391543}
    HKEY_CLASSES_ROOT\TypeLib\{BA87B15B-7DE7-4DA4-8BF7-5C616D6C99DA}
    HKEY_CLASSES_ROOT\bho.FResultsRequest
    HKEY_CLASSES_ROOT\bho.FResultsRequest.1
    HKEY_CLASSES_ROOT\Bho.FeaturedResultsBHO
    HKEY_CLASSES_ROOT\Bho.FeaturedResultsBHO.1
    HKEY_CLASSES_ROOT\bho.FResultsRequestDispatcher
    HKEY_CLASSES_ROOT\bho.FResultsRequestDispatcher.1
    HKEY_CLASSES_ROOT\bho.IAdvertisementBHO
    HKEY_CLASSES_ROOT\bho.IAdvertisementBHO.1
    HKEY_CLASSES_ROOT\AppID\bho.DLL
    HKEY_CLASSES_ROOT\AppID\My404.DLL
    HKEY_CLASSES_ROOT\My404.Bho404
    HKEY_CLASSES_ROOT\My404.Bho404.1
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarBHO
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarBHO.1
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarName
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarName.1
    HKEY_CLASSES_ROOT\BrowserAidToolbar.Helper
    HKEY_CLASSES_ROOT\BrowserAidToolbar.Helper.1
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEShower
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEShower.1
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEToolBar
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEToolBar.1
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Currentversion\Explorer\Browser Helper Objects
    \{087173ef-9829-4f49-8340-a524177d3f60}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{0DDBB570-0396-44C9-986A-8F6F61A51C2F}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{12EE7A5E-0674-42f9-A76A-000000004D00}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{5F5564AC-DE7A-4DCD-9296-32E71A35DCB6}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{80672997-D58C-4190-9843-C6C61AF8FE97}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Extensions\{07B7F771-1B8E-4B7B-823E-FFAC1732AA9E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars\{12EE7A5E-0674-42f9-A76B-000000004D00}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LetsSearch
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunWindowsUpdate
    HKEY_CURRENT_USER\Software\A70F6A1D-0195-42a2-934C-D8AC0F7C08EB
    HKEY_CURRENT_USER\Software\{12EE7A5E-0674-42f9-A76B-000000004D00}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2CF0B992-5EEB-4143-99C2-5297EF71F44A}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{2CF0B992-5EEB-4143-99C2-5297EF71F44C}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars
    \{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{2CF0B992-5EEB-4143-99C2-5297EF71F44A}
    HKEY_LOCAL_MACHINE\SOFTWARE\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_USERS\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{2CF0B992-5EEB-4143-99C2-5297EF71F44A}
    HKEY_USERS\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_USERS\Software\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}

  4. Adds some of the following values:

    "{12EE7A5E-0674-42f9-A76B-000000004D00}" = "rundll32.exe stlb2.dll,DllRunMain"
    "A70F6A1D-0195-42A2-934C-D8AC0F7C08EB"   = "rundll32.exe E6F1873B.DLL, D9EBC318C"
    "Rundll32_7" = "rundll32.exe C:\WINDOWS\System32\msiefr40.dll,DllRunServer"
    "Rundll32_8" = "rundll32.exe C:\1.dll,DllRunServer"
    "
    {2CF0B992-5EEB-4143-99C2-5297EF71F44B}" = "rundll32.exe STLBUPDT.dll,DllRunMain"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  5. May add the value:

    "{12EE7A5E-0674-42f9-A76B-000000004D00}" = ""

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar



The following instructions pertain to all Symantec antivirus products that support security risk detection.
  1. Update the definitions.
  2. Close all open browser windows.
  3. Run a full system scan.
  4. Delete any values added to the registry.
For specific details on each of these steps, read the following instructions.

1. To update the definitions
To obtain the most recent definitions, start your Symantec program and run LiveUpdate.

2. To close all open browser windows
Since Adware.BrowserAid functions as a Microsoft Internet Explorer plugin, it is necessary to close all the open browser windows to remove it. If you are reading this writeup in Internet Explorer, print this writeup using our printer-friendly option at the top of the page, or write down the following instructions, and then close all the open browser windows.

3. To run the scan
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected, and depending on which software version you are using, you may see one or more of the following options:

    Note: This applies only to versions of Norton AntiVirus that support security risk detection. If you are running a version of Symantec AntiVirus Corporate Edition that supports security risk detection, and security risk detection has been enabled, you will only see a message box that gives the results of the scan. If you have questions in this situation, contact your network administrator.
    • Exclude (Not recommended): If you click this button, it will set the risk so that it is no longer detectable. That is, the antivirus program will keep the security risk on your computer and will no longer detect it to remove from your computer.

    • Ignore or Skip: This option tells the scanner to ignore the risk for this scan only. It will be detected again the next time that you run a scan.

    • Cancel: This option is new to Norton Antivirus 2005. It is used when Norton Antivirus 2005 has determined that it cannot delete a security risk. This Cancel option tells the scanner to ignore the risk for this scan only, and thus, the risk will be detected again the next time that you run a scan.

      To actually delete the security risk:
      • Click its file name (under the Filename column).
      • In the Item Information box that displays, write down the full path and file name.
      • Then use Windows Explorer to locate and delete the file.

    • Delete: This option will attempt to delete the detected files. In some cases, the scanner will not be able to do this.
      • If you see a message, "Delete Failed" (or similar message), manually delete the file.
      • Click the file name of the risk that is under the Filename column.
      • In the Item Information box that displays, write down the full path and file name.
      • Then use Windows Explorer to locate and delete the file.

Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode . Once you have restarted in Safe mode, run the scan again.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the risk may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

4. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. Read the document: How to make a backup of the Windows registry .
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

    Note: If the registry editor fails to open the risk may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  3. Navigate to and delete the following registry subkeys, if present:

    HKEY_CLASSES_ROOT\AppID\{418B46A9-5343-4E1A-A654-42B04E3F869E}
    HKEY_CLASSES_ROOT\AppID\{87690003-2714-45E7-8A1B-DC0658DE778C}
    HKEY_CLASSES_ROOT\CLSID\{087173EF-9829-4F49-8340-A524177D3F60}
    HKEY_CLASSES_ROOT\CLSID\{0ddbb570-0396-44c9-986a-8f6f61a51c2f}
    HKEY_CLASSES_ROOT\CLSID\{12EE7A5E-0674-42f9-A76A-000000004D00}
    HKEY_CLASSES_ROOT\CLSID\{12EE7A5E-0674-42f9-A76B-000000004D00}
    HKEY_CLASSES_ROOT\CLSID\{337D0C1D-4053-4FAB-AF2B-45C2F7B0FAA6}
    HKEY_CLASSES_ROOT\CLSID\{5F5564AC-DE7A-4DCD-9296-32E71A35DCB6}
    HKEY_CLASSES_ROOT\CLSID\{606220AE-90E0-41CA-BF6D-C89272ED680C}
    HKEY_CLASSES_ROOT\CLSID\{80672997-D58C-4190-9843-C6C61AF8FE97}
    HKEY_CLASSES_ROOT\CLSID\{DBD7AAA2-1725-4663-8C8B-52A840693469}
    HKEY_CLASSES_ROOT\CLSID\{E004800A-73C6-4587-B855-98D0CE0C16B1}
    HKEY_CLASSES_ROOT\CLSID\{F20AE630-6DE2-43CA-A988-7CD40C36EF0B}
    HKEY_CLASSES_ROOT\Interface\{2A167E61-D100-450D-A1B0-6EAF394BCB87}
    HKEY_CLASSES_ROOT\Interface\{4A2563C7-FC68-4EE8-A11C-2022EBCC1B0F}
    HKEY_CLASSES_ROOT\Interface\{4B0FCEB7-8163-46EE-9EAF-85BD933D0A46}
    HKEY_CLASSES_ROOT\Interface\{670801FD-C247-4E44-9424-69E5D77C6725}
    HKEY_CLASSES_ROOT\Interface\{8A7D38BE-849D-478F-A7CF-55EC95722358}
    HKEY_CLASSES_ROOT\Interface\{E58F4168-608C-45C2-9BFF-061229730B2E}
    HKEY_CLASSES_ROOT\Interface\{EE06D877-386F-4A44-A9ED-75EB6C3E7E80}
    HKEY_CLASSES_ROOT\Interface\{EE06D877-386F-4A44-A9ED-75EB6C3E7E81}
    HKEY_CLASSES_ROOT\Interface\{F8D96098-E9F7-42E1-88F3-A3719D70EA8D}
    HKEY_CLASSES_ROOT\TypeLib\{12EE7A5E-0674-42F9-A76C-000000004D00}
    HKEY_CLASSES_ROOT\TypeLib\{7313BFD0-62C4-40F4-8041-3FBDBC80AC07}
    HKEY_CLASSES_ROOT\TypeLib\{85C2C2A1-3F20-4EAD-ADC3-BD3217391543}
    HKEY_CLASSES_ROOT\TypeLib\{BA87B15B-7DE7-4DA4-8BF7-5C616D6C99DA}
    HKEY_CLASSES_ROOT\bho.FResultsRequest
    HKEY_CLASSES_ROOT\bho.FResultsRequest.1
    HKEY_CLASSES_ROOT\Bho.FeaturedResultsBHO
    HKEY_CLASSES_ROOT\Bho.FeaturedResultsBHO.1
    HKEY_CLASSES_ROOT\bho.FResultsRequestDispatcher
    HKEY_CLASSES_ROOT\bho.FResultsRequestDispatcher.1
    HKEY_CLASSES_ROOT\bho.IAdvertisementBHO
    HKEY_CLASSES_ROOT\bho.IAdvertisementBHO.1
    HKEY_CLASSES_ROOT\AppID\bho.DLL
    HKEY_CLASSES_ROOT\AppID\My404.DLL
    HKEY_CLASSES_ROOT\My404.Bho404
    HKEY_CLASSES_ROOT\My404.Bho404.1
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarBHO
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarBHO.1
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarName
    HKEY_CLASSES_ROOT\_ATL_GENERATED.SearchToolbarName.1
    HKEY_CLASSES_ROOT\BrowserAidToolbar.Helper
    HKEY_CLASSES_ROOT\BrowserAidToolbar.Helper.1
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEShower
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEShower.1
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEToolBar
    HKEY_CLASSES_ROOT\BrowserAidToolbar.IEToolBar.1
    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Currentversion\Explorer\Browser Helper Objects
    \{087173ef-9829-4f49-8340-a524177d3f60}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{0DDBB570-0396-44C9-986A-8F6F61A51C2F}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{12EE7A5E-0674-42f9-A76A-000000004D00}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{5F5564AC-DE7A-4DCD-9296-32E71A35DCB6}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{80672997-D58C-4190-9843-C6C61AF8FE97}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Extensions\{07B7F771-1B8E-4B7B-823E-FFAC1732AA9E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars\{12EE7A5E-0674-42f9-A76B-000000004D00}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LetsSearch
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunWindowsUpdate
    HKEY_CURRENT_USER\Software\A70F6A1D-0195-42a2-934C-D8AC0F7C08EB
    HKEY_CURRENT_USER\Software\{12EE7A5E-0674-42f9-A76B-000000004D00}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2CF0B992-5EEB-4143-99C2-5297EF71F44A}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{2CF0B992-5EEB-4143-99C2-5297EF71F44C}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Explorer Bars
    \{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    \{2CF0B992-5EEB-4143-99C2-5297EF71F44A}
    HKEY_LOCAL_MACHINE\SOFTWARE\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_USERS\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{2CF0B992-5EEB-4143-99C2-5297EF71F44A}
    HKEY_USERS\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}
    HKEY_USERS\Software\{2CF0B992-5EEB-4143-99C2-5297EF71F44B}

  4. Navigate to the registry subkey:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

  5. In the right pane, delete any of the following values, if they exist:

    "{12EE7A5E-0674-42f9-A76B-000000004D00}" = "rundll32.exe stlb2.dll,DllRunMain"
    "A70F6A1D-0195-42A2-934C-D8AC0F7C08EB"   = "rundll32.exe E6F1873B.DLL, D9EBC318C"
    "Rundll32_7" = "rundll32.exe C:\WINDOWS\System32\msiefr40.dll,DllRunServer"
    "Rundll32_8" = "rundll32.exe C:\1.dll,DllRunServer"
    "
    {2CF0B992-5EEB-4143-99C2-5297EF71F44B}" = "rundll32.exe STLBUPDT.dll,DllRunMain"

  6. Navigate to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar

  7. In the right pane, delete the value:

    "{12EE7A5E-0674-42f9-A76B-000000004D00}" = ""

  8. Exit the Registry Editor.