Threat Explorer

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Adware.Mirar

Adware.Mirar

Updated:
February 13, 2007
Risk Impact:
Low
File Names:
MirarSetup.exe,WinDmy.dll,NN_Bar21.dll,installer.cab,WinNB[xx].dll ([xx] = Version Number)
Systems Affected:
Windows

Behavior


Adware.Mirar attempts to find Web pages that are related to the Web page currently being viewed. It also displays advertisements based on the URLs and search terms used while navigating the Internet. It will also attempt to download and install the Mirar toolbar from a predetermined Web site. This toolbar is also detected as Adware.Mirar.

Symptoms


The files are detected as Adware.Mirar.

Behavior


Adware.Mirar must be manually installed.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version May 29, 2017 revision 009
  • Initial Daily Certified version September 18, 2004 revision 019
  • Latest Daily Certified version May 29, 2017 revision 019
  • Initial Weekly Certified release date September 22, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Adware.Mirar is installed, it does the following:
  1. Creates the following files:

    • %System%\WinDmy.dll
    • %System%\Winnb56.dll
    • %System%\WinNB57.dll
    • %WinDir%\Downloaded Program Files\MirarSetup.exe
    • %UserProfile%\Local Settings\Temp\875455-NOSB.exe
    • %UserProfile%\Local Settings\Temp\mit3.tmp
    • %UserProfile%\Local Settings\Temp\mit3.tmp.cab

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

  2. Creates the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\RelatedPageInstall

    and adds subkeys and values to the subkey to set flags and configurations.

  3. Adds the value:

    "ToolbarInstall" = "MirarSetup.exe"

    to the registry key:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

    so that the Adware runs when you start Windows.

    Note: The value added to the run key may point to the location the Adware was run from.

  4. Adds the value:

    "{9A9C9B68-F908-4AAB-8D0C-10EA8997F37E}" = ""

    to the registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar
    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser

  5. Adds the values:

    "C:\WINDOWS\Downloaded Program Files\MirarSetup.exe" = ""
    "C:\WINDOWS\System32\WinDmy.dll" = ""

    to the registry keys:

    HKEY_LOCAL_MACHINE%\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs
  6. Attempts to download and install the Mirar Toolbar.

    Depending on the version of the toolbar being installed, an End-User License Agreement is displayed outlining the functionality of the toolbar.

  7. Creates the following registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8A0DCBDA-6E20-489C-9041-C1E8A0352E75}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9A9C9B68-F908-4AAB-8D0C-10EA8997F37E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9A9C9B69-F908-4AAB-8D0C-10EA8997F37E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{179E4B4A-76C3-4F65-BCED-C9FA1A28D2EF}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1037B06C-84B7-4240-8D80-485810A0497D}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{224302B0-94E9-45C2-9E5B-BA989EE556E1}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{54B287F9-FD90-4457-B65E-CB91560C021D}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6E4C7AFC-9915-4036-B7F9-8B3F1710788F}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{566DEDE9-9ED8-45DA-9BE6-9B2EEAB17F49}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F8310E7D-4C4D-46A4-A068-B5BB99411CC7}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar_Dummy.NN_BarDummy
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar_Dummy.NN_BarDummy.1
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_Bar_Helper
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_Bar_Helper.1
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_WebBand
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_WebBand.1
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{9A9C9B69-F908-4AAB-8D0C-10EA8997F37E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4035DE1B-D54A-411E-9EE7-923295D2E86E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{753B9349-7E46-4E5C-A27F-A60A6BF1EAB5}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\net-nucleus.com
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{8A0DCBDA-6E20-489C-9041-C1E8A0352E75}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ModuleUsage\C:/WINDOWS/Downloaded Program Files/MirarSetup.exe
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ModuleUsage\C:/WINDOWS/System32/WinDmy.dll
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database\Distribution Units\{8A0DCBDA-6E20-489C-9041-C1E8A0352E75}

    to install the Mirar Toolbar.

    Note: Later variants of the toolbar are known to create two random entries in the subkey HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID.



The following instructions pertain to all Symantec antivirus products that support Security Risk detection.
  1. Update the definitions.
  2. Close all open Internet Explorer windows
  3. Run a full system scan.
  4. Delete the values that were 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 Internet Explorer windows
Because Adware.Mirar functions as a Microsoft Internet Explorer plugin, it is necessary to close all open Internet Explorer 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 Internet Explorer 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 as Adware.Mirar 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 threat 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 threat 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 threat for this scan only, and thus, the threat 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.

    • 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 threat 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.

4. To delete the values 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 ," 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 value:

    "ToolbarInstall" = "MirarSetup.exe"

  5. Navigate to the keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar
    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser

  6. In the right pane, delete the value:

    "{9A9C9B68-F908-4AAB-8D0C-10EA8997F37E}" = ""

  7. Navigate to the key:

    HKEY_LOCAL_MACHINE%\SOFTWARE\Microsoft\Windows\CurrentVersion\SharedDLLs

  8. In the right pane, delete the values:

    "C:\WINDOWS\Downloaded Program Files\MirarSetup.exe" = ""
    "C:\WINDOWS\System32\WinDmy.dll" = ""

  9. Navigate to and delete the following registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\RelatedPageInstall
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8A0DCBDA-6E20-489C-9041-C1E8A0352E75}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9A9C9B68-F908-4AAB-8D0C-10EA8997F37E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{9A9C9B69-F908-4AAB-8D0C-10EA8997F37E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{179E4B4A-76C3-4F65-BCED-C9FA1A28D2EF}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1037B06C-84B7-4240-8D80-485810A0497D}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{224302B0-94E9-45C2-9E5B-BA989EE556E1}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{54B287F9-FD90-4457-B65E-CB91560C021D}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{6E4C7AFC-9915-4036-B7F9-8B3F1710788F}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{566DEDE9-9ED8-45DA-9BE6-9B2EEAB17F49}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{F8310E7D-4C4D-46A4-A068-B5BB99411CC7}
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar_Dummy.NN_BarDummy
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar_Dummy.NN_BarDummy.1
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_Bar_Helper
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_Bar_Helper.1
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_WebBand
    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\NN_Bar.NN_WebBand.1
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{9A9C9B69-F908-4AAB-8D0C-10EA8997F37E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{4035DE1B-D54A-411E-9EE7-923295D2E86E}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{753B9349-7E46-4E5C-A27F-A60A6BF1EAB5}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\net-nucleus.com
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{8A0DCBDA-6E20-489C-9041-C1E8A0352E75}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ModuleUsage\C:/WINDOWS/Downloaded Program Files/MirarSetup.exe
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ModuleUsage\C:/WINDOWS/System32/WinDmy.dll
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database\Distribution Units\{8A0DCBDA-6E20-489C-9041-C1E8A0352E75}

  10. Exit the Registry Editor.