Threat Explorer

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Adware.OpenSite

Adware.OpenSite

Updated:
February 13, 2007
Publisher:
zuvio.com
Risk Impact:
Low
File Names:
Opnste.exe
Systems Affected:
Windows

Behavior


Adware.OpenSite is an adware program that displays advertisements based on keywords in the address bar. It may also change the default home page in Internet Explorer.

Note: Virus definitions dated prior to October 24, 2003 may detect this as W32.Adclicker.F.Trojan.

Symptoms


The files are detected as Adware.OpenSite.

Behavior


This adware program can be manually installed or downloaded from the Web site, zuvio.com.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version April 14, 2015 revision 008
  • Initial Daily Certified version October 24, 2003
  • Latest Daily Certified version April 14, 2015 revision 021
  • Initial Weekly Certified release date October 24, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Adware.OpenSite is installed, it performs the following actions:
  1. Creates the folder, C:\Program Files\Open Site. All the files belonging to this adware will be inserted into this folder.

  2. Displays advertisements based on keywords that a user types in the address bar.

    Adds the value:

    Open Site = C:\Program Files\Open Site\opnste.exe

    to the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that the adware runs when Windows starts.

  3. Creates the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Open Site

  4. May Modify the default home page in Internet Explorer.




Note: Removing this adware component from the system will likely cause the program that installed it to not function as intended. The uninstaller generally identifies the programs that will not work after uninstallation.


The following instructions pertain to all Symantec antivirus products that support Security Risk detection.
  1. Update the definitions.
  2. Uninstall the adware program using the Add/Remove Programs utility.
  3. Run a full system scan and delete all the files detected as Adware.OpenSite.
  4. Restore the Internet Explorer home page.
For specific details on each of these steps, read the following instructions.

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

2. Uninstalling the Adware program
  1. Do one of the following:
    • On the Windows 98 taskbar:
      1. Click Start > Settings > Control Panel.
      2. In the Control Panel window, double-click Add/Remove Programs.

    • On the Windows Me taskbar:
      1. Click Start > Settings > Control Panel.
      2. In the Control Panel window, double-click Add/Remove Programs.
        If you do not see the Add/Remove Programs icon, click "...view all Control Panel options."

    • On the Windows 2000 taskbar:
      By default, Windows 2000 is set up the same as Windows 98. In that case, follow the instructions for Windows 98. Otherwise, click Start, point to Settings, point to Control Panel, and then click Add/Remove Programs.

    • On the Windows XP taskbar:
      1. Click Start > Control Panel.
      2. In the Control Panel window, double-click Add or Remove Programs.

  2. Click Open Site.


    Note: You may need to use the scroll bar to view the whole list.

  3. Click Add/Remove, Change/Remove, or Remove (this varies with the operating system). Follow the prompts.

3. Scanning for and deleting the files
  1. Start Norton AntiVirus and make sure that it is configured to scan all the files. For more information, read the document, "How to configure Norton AntiVirus to scan all files."
  2. Run a full system scan.
  3. If any files are detected as Adware.OpenSite, click Delete.


    Note: If you ran the Add/Remove programs applet as described in the previous section, it is possible that all the files were removed, and therefore none will be detected.
4. Restoring the Internet Explorer home page
  1. Start Microsoft Internet Explorer.
  2. Connect to the Internet and go to the page that you want to set as your home page.
  3. Click Tools > Internet Options.
  4. In the Home page section of the General tab, click Use Current > OK.