Threat Explorer

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Adware.WinFetch

Adware.WinFetch

Updated:
February 13, 2007
Risk Impact:
Medium
File Names:
clicks.dll; addit.exe; [RANDOM FILE NAME].exe
Systems Affected:
Windows

Behavior


Adware.WinFetch is an adware component that various advertisers may use.

Symptoms


The files are detected as Adware.WinFetch.
  • The Windows Explorer Home Page has been changed.
  • The Windows Explorer Search Page has been changed.


Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version February 01, 2015 revision 020
  • Initial Daily Certified version June 01, 2004
  • Latest Daily Certified version January 26, 2015 revision 023
  • Initial Weekly Certified release date June 01, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Adware.WinFetch is a Browser Helper Object. Its name and registry path vary.

When Adware.WinFetch is executed, it performs the following actions:
  1. Adds the value:

    "[ORIGINAL FILE NAME]" = "[PATH TO FILE NAME]"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that the adware starts with Windows.

  2. Creates the following registry subkeys and adds a number of values under these subkeys:

    HKEY_CLASSES_ROOT\CLSID\{E8EAEB34-F7B5-4C55-87FF-720FAF53D841}
    HKEY_CLASSES_ROOT\Interface\{E318D698-27B3-44D5-8998-C35EAFB9C034}
    HKEY_CLASSES_ROOT\TypeLib\{ECB25A48-E6E0-49AF-99AF-07C763E31389}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{E8EAEB34-F7B5-4C55-87FF-720FAF53D841}
    HKEY_CLASSES_ROOT\SearchHelp
    HKEY_CLASSES_ROOT\AppID\SearchHelp.Dll

  3. Adds files to the directories:

    %ProgramFiles%\midaddle\
    %UserProfile%\Local Settings\Temp\

    Notes:
    • %ProgramFiles% is a variable that refers to the program files folder. By default, this is C:\Program Files.
    • %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).

  4. May change the Windows Explorer Home Page and Search Page, based on which adware is downloaded.



The following instructions pertain to all current and recent Symantec antivirus products that support Security Risk detection.
  1. Update the virus definitions.
  2. Restart the computer in Safe mode.
  3. Run a full system scan and delete all the files detected as Adware.WinFetch.
  4. Delete the value that was 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 restart the computer in Safe mode
Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode. For instructions, read the document, "How to start the computer in Safe Mode ."

3. To scan for and delete the files
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected as Adware.WinFetch, write down the file name, and then click Delete.

    Note:
    If your Symantec antivirus product reports that it cannot delete a detected file, write down the path and file name. Then use Windows Explorer to locate and delete the file.


4. To delete the value from the registry

WARNING:
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 keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

  3. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete the following value detected as Adware.WinFetch:

    "[ORIGINAL FILE NAME]" = "[PATH TO FILE NAME]"

  5. Exit the Registry Editor.

  6. Restart the computer in Normal mode. For instructions, read the section on returning to Normal mode in the document, "How to start the computer in Safe Mode."