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Adware.7000n

Adware.7000n

Updated:
February 13, 2007
Publisher:
7000n.com
Risk Impact:
Medium
File Names:
%system%\twain_16.dll
Systems Affected:
Windows

Behavior


Adware.7000n is a Browser Helper Object (BHO) that contacts a particular Web site when Internet Explorer is started.

Symptoms


Whenever Internet Explorer is started, www.7000n.com will be shown.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version March 23, 2017 revision 037
  • Initial Daily Certified version April 11, 2005
  • Latest Daily Certified version March 23, 2017 revision 041
  • Initial Weekly Certified release date April 13, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Adware.7000n is distributed as an executable file. When Adware.7000n is executed, it will perform the following actions:
  1. Creates the following file:

    %System%\twain_16.dll

    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).

  2. Adds the following registry keys:

    HKEY_CLASSES_ROOT\Twain_16.iebho.1
    HKEY_CLASSES_ROOT\Twain_16.iebho
    HKEY_CLASSES_ROOT\CLSID\{AE21A223-C4CA-43D7-9764-4FC6DF529F4D}
    HKEY_CLASSES_ROOT\TypeLib\{F05FC250-632C-424C-83D8-64640B6BED21}
    HKEY_CLASSES_ROOT\Interface\{6F9D44B8-E418-49C1-885C-1015DDDBFFC4}

    so that Adware.7000n is registered.

  3. Adds the value:

    "(Default)" = "ie assist"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{AE21A223-C4CA-43D7-9764-4FC6DF529F4D}

    so that the Adware.7000n is executed every time Internet Explorer is started.

  4. Redirects Internet Explorer to www.7000n.com, a portal site in China, regardless of the Home page setting of Internet Explorer.



The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
  1. Update the definitions.
  2. Run a full system scan.
  3. 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 run the scan
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected as Adware.7000n 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.

        If Windows reports that it cannot delete the file, this indicates that the file is in use. In this situation, complete the rest of the instructions on this page, restart the computer in Safe mode, and then delete the file using Windows Explorer. Restart the computer in Normal mode.

    • 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.

        If Windows reports that it cannot delete the file, this indicates that the file is in use. In this situation, complete the rest of the instructions on this page, restart the computer in Safe mode, and then delete the file using Windows Explorer. Restart the computer in Normal mode.


3. 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. For instructions refer to the document: How to make a backup of the Windows registry.
  1. Click Start > Run.
  2. Type regedit
  3. Click OK.

  4. Navigate to the subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{AE21A223-C4CA-43D7-9764-4FC6DF529F4D}

  5. In the left pane, delete the key:

    "{AE21A223-C4CA-43D7-9764-4FC6DF529F4D}"

  6. Navigate to the subkey:

    HKEY_CLASSES_ROOT\Twain_16.iebho.1

  7. In the left pane, delete the key:

    Twain_16.iebho.1

  8. Navigate to the subkey:

    HKEY_CLASSES_ROOT\Twain_16.iebho

  9. In the left pane, delete the key:

    Twain_16.iebho

  10. Navigate to the subkey:

    HKEY_CLASSES_ROOT\CLSID\{AE21A223-C4CA-43D7-9764-4FC6DF529F4D}

  11. In the left pane, delete the key:

    {AE21A223-C4CA-43D7-9764-4FC6DF529F4D}

  12. Navigate to the subkey:

    HKEY_CLASSES_ROOT\TypeLib\{F05FC250-632C-424C-83D8-64640B6BED21}

  13. In the left pane, delete the key:

    {F05FC250-632C-424C-83D8-64640B6BED21}

  14. Navigate to the subkey:

    HKEY_CLASSES_ROOT\Interface\{6F9D44B8-E418-49C1-885C-1015DDDBFFC4}

  15. In the left pane, delete the key:

    {6F9D44B8-E418-49C1-885C-1015DDDBFFC4}

  16. Exit the Registry Editor.