Threat Explorer

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Adware.Aornum

Adware.Aornum

Updated:
February 13, 2007
Version:
1.3.2.2
Publisher:
iwon.com
Risk Impact:
Medium
File Names:
Aornum.exe,Aornidle.dll,Aornumax.dll
Systems Affected:
Windows

Behavior


Adware.Aornum is an Internet Explorer Browser Helper Object that is also run as a Windows task. This Adware can open pop-up ads when browsing the Web using Internet Explorer.

Symptoms


The files on the system are detected as Adware.Aornum.

Behavior


This can be installed by software from the iwon.com Web site.

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 May 20, 2003
  • Latest Daily Certified version January 17, 2008 revision 033
  • Initial Weekly Certified release date May 22, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Adware.Aornum is an Internet Explorer Browser Helper Object that runs as a Windows task.

When it is executed, the installer performs the following actions:
  1. Installs several files into the %Windir% folder.


    Note: %Windir% is a variable. The adware installer locates the Windows installation folder (by default, this is C:\Windows or C:\Winnt) and copies itself to that location.

  2. Starts a running process (usually Aornum) that can make calls to various servers to update the adware's code.
  3. Creates the%Windir%\Program Files\Ornum folder.
  4. Creates the following registry keys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\Aornum

    HKEY_CURRENT_USER\Software\Aornum

    HKEY_CURRENT_USER\Software\TENsoft




Note: Removing this adware component from the system will probably cause the program that installed it to not function as intended. The uninstaller generally identifies the programs that will not work after uninstallation.
  1. Update the virus definitions.
  2. Delete the keys that were added to the registry. Restart the computer.
  3. Run a full system scan and delete all the files detected as Adware.Aornum. Delete the Ornum folder.
For specific details on each of these steps, read the following instructions.

1. Updating the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
  • Run LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
  • Download the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted on U.S. business days (Monday through Friday). You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).

    The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.

2. Deleting the keys 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. On the taskbar, click Start > Run. (The Run dialog box appears.)
  2. In the Run dialog box, type regedit
  3. Click OK.
  4. In the Registry Editor, navigate to and delete the following keys:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\Aornum

    HKEY_CURRENT_USER\Software\Aornum

    HKEY_CURRENT_USER\Software\TENsoft

  5. Exit the Registry Editor.
  6. Restart the computer.


3. Scanning for and deleting the infected files
  1. Start your Symantec antivirus program and make sure that it is configured to scan all the files:
  2. Run a full system scan.
  3. If any files are detected as infected with Adware.Aornum, click Delete.
  4. Using Windows Explorer, delete the Windir%\Program Files\Ornum folder.