Threat Explorer

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Adware.VirtualBouncer

Adware.VirtualBouncer

Updated:
February 13, 2007
Publisher:
SpywareLabs Inc
Risk Impact:
Medium
File Names:
VirtualBouncer.exe
Systems Affected:
Windows

Behavior


Adware.VirtualBouncer masquerades as a legitimate spyware remover but sets itself to run when Windows starts and remains memory-resident on the compromised computer. The adware will periodically attempt to contact a remote server to download updates and instructions.

Some versions we have seen will prompt the user to purchase an upgrade to Virtual Bouncer, by displaying pop-up advertisements telling him/her that their computer is at risk.

Symptoms


The files detected as Adware.VirtualBouncer.

Behavior


This adware program must be manually installed or installed as a component of another program.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version December 13, 2016 revision 023
  • Initial Daily Certified version September 24, 2003
  • Latest Daily Certified version December 14, 2016 revision 002
  • Initial Weekly Certified release date September 24, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Some versions of Adware.VirtualBouncer will display an End Use License Agreement (EULA) when they are installed, giving the software the right to download and install "updates" to the software from its servers.

Other versions may perform these actions silently, without telling the user what is happening.

Depending on the version, some of the following may happen:
  1. Creates the following files:

    • %ProgramFiles%\VBouncer\VBouncer.exe
    • %ProgramFiles%\VBouncer\VBDNR.dll
    • %AppData%\VBouncer\*.*
    • %UserPrograms%\Virtual Bouncer\*.lnk
    • %System%\vb2uninstaller4_19.EXE

      Note: %ProgramFiles% is a variable that refers to the Program Files folder. By default, this is C:\Program Files.
      %AppData% is a variable that refers to the following folder: C:\Documents and Settings\All Users\Application Data
      %UserPrograms% is a variable that refers to the following folder: C:\Documents and Settings\<current user>\Start Menu\Programs
      %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. Modifies the value:

    "VBouncer" = "C:\PROGRA~1\VBouncer\VBouncer.exe"

    in the registry subkey:

    HKEY_ALL_USERS\SOFTWARE\Microsoft\Windows\CurrentVerison\Run

    so that the adware will run on start-up.

  3. Creates the following registry subkeys:

    HKEY_CLASSES_ROOT\CLSID\{25AE1A9B-87D2-418F-A3A6-5A46EDC37A84}
    HKEY_CLASSES_ROOT\CLSID\{9CC6F6D3-8B13-4206-ABC1-8B285F9413A7}
    HKEY_CLASSES_ROOT\CLSID\{9FE4D9E6-13BB-43E0-8C74-9800573DA4D6}
    HKEY_CLASSES_ROOT\CLSID\{A85C505E-AAE3-4CB0-AEE1-CB8213B140FB}
    HKEY_CLASSES_ROOT\CLSID\{B0BE4BBC-C1B6-4EA3-B346-7358FEC20248}
    HKEY_CLASSES_ROOT\CLSID\{BE40278C-1C4E-4A63-BC3D-811646900A1A}
    HKEY_CLASSES_ROOT\CLSID\{CF0FBBF5-1DDD-4D58-B480-AC2C2A4186D3}
    HKEY_CLASSES_ROOT\CLSID\{DCB5773B-4D84-4E6F-8E21-96F2A5B431A8}
    HKEY_CLASSES_ROOT\CLSID\{EEC056CE-3E1B-4571-BEE1-EAB9876B35F8}
    HKEY_CLASSES_ROOT\Interface\{0990E9A3-FC49-4AA8-91CE-F738BCBB7C8F}
    HKEY_CLASSES_ROOT\Interface\{261214CB-3021-4DE0-9D21-5957ACD1781A}
    HKEY_CLASSES_ROOT\Interface\{2C2EBD54-ED76-4343-902B-336D1DB63763}
    HKEY_CLASSES_ROOT\Interface\{36C9C487-E14F-4BB9-9882-AC613193EE46}
    HKEY_CLASSES_ROOT\Interface\{6A4C71B1-1A79-483A-A400-F026936CC7B7}
    HKEY_CLASSES_ROOT\Interface\{85D1E607-0C1A-4E69-BA9B-2E5FFA382D68}
    HKEY_CLASSES_ROOT\Interface\{88EB5B21-0FE7-4208-8F1C-26915F7E2432}
    HKEY_CLASSES_ROOT\Interface\{934E4898-DE90-45E1-ADF4-C383DCAE7B26}
    HKEY_CLASSES_ROOT\Interface\{BE05F07D-131C-4935-941B-0D41CEB07E67}
    HKEY_CLASSES_ROOT\Interface\{E2B951F0-9F32-4260-90F7-A988BEFF7F0C}
    HKEY_CLASSES_ROOT\Interface\{F634E01A-833A-49FB-BAE2-3A00CECC3A94}
    HKEY_CLASSES_ROOT\TypeLib\{73D7ABFE-D325-430A-817F-64C7BFD48813}
    HKEY_CLASSES_ROOT\VBDNR.cCookie
    HKEY_CLASSES_ROOT\VBDNR.cErrorLog
    HKEY_CLASSES_ROOT\VBDNR.cHistory
    HKEY_CLASSES_ROOT\VBDNR.cRegistryRoutines
    HKEY_CLASSES_ROOT\VBDNR.cScheduler
    HKEY_CLASSES_ROOT\VBDNR.cSignature
    HKEY_CLASSES_ROOT\VBDNR.cThreatLevel
    HKEY_CLASSES_ROOT\VBDNR.cUserSettings
    HKEY_CLASSES_ROOT\VBDNR.DNRDirector
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Virtual Bouncer
    HKEY_ALL_USERS\Software\VB and VBA Program Settings
    HKEY_ALL_USERS\Software\VB and VBA Program Settings\VBouncer
    HKEY_ALL_USERS\Software\VB and VBA Program Settings\VBouncer\Settings



The following instructions pertain to all Symantec antivirus products that support security risk detection.
  1. Update the definitions.
  2. Uninstall the security risk.
  3. Run a full system scan.
  4. 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 uninstall the Security Risk
  1. Do one of the following:
    1. On the Windows 98 taskbar:
      1. Click Start > Settings > Control Panel.
      2. In the Control Panel window, double-click Add/Remove Programs.

    2. 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."

    3. On the Windows 2000 taskbar:
      By default, Windows 2000 is set up the same as Windows 98, so follow the instructions for Windows 98. If otherwise, click Start, point to Settings > Control Panel, and then click Add/Remove Programs.

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

  2. Click Virtual Bouncer.


    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.

    Note: After running the Add/Remove programs applet, all the files may have been removed. You will want to run a full system scan to ensure that this is the case. However, it is possible that no files will be detected after using Add/Remove programs.
3. To run the scan
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected, 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.
Important: If your Symantec antivirus product reports that it cannot delete a detected file, Windows may be using the file. To fix this, run the scan in Safe mode. For instructions, read the document: How to start the computer in Safe Mode . Once you have restarted in Safe mode, run the scan again.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the risk may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [File path]
Message body: Windows cannot find [file name]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

4. 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. Read the document: How to make a backup of the Windows registry .
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

    Note: If the registry editor fails to open the risk may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  3. Navigate to the subkey:

    HKEY_ALL_USERS\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  4. In the right pane, delete any values pertaining to Virtual Bouncer.

  5. Navigate to and delete the following registry keys:

    HKEY_CLASSES_ROOT\CLSID\{25AE1A9B-87D2-418F-A3A6-5A46EDC37A84}
    HKEY_CLASSES_ROOT\CLSID\{9CC6F6D3-8B13-4206-ABC1-8B285F9413A7}
    HKEY_CLASSES_ROOT\CLSID\{9FE4D9E6-13BB-43E0-8C74-9800573DA4D6}
    HKEY_CLASSES_ROOT\CLSID\{A85C505E-AAE3-4CB0-AEE1-CB8213B140FB}
    HKEY_CLASSES_ROOT\CLSID\{B0BE4BBC-C1B6-4EA3-B346-7358FEC20248}
    HKEY_CLASSES_ROOT\CLSID\{BE40278C-1C4E-4A63-BC3D-811646900A1A}
    HKEY_CLASSES_ROOT\CLSID\{CF0FBBF5-1DDD-4D58-B480-AC2C2A4186D3}
    HKEY_CLASSES_ROOT\CLSID\{DCB5773B-4D84-4E6F-8E21-96F2A5B431A8}
    HKEY_CLASSES_ROOT\CLSID\{EEC056CE-3E1B-4571-BEE1-EAB9876B35F8}
    HKEY_CLASSES_ROOT\Interface\{0990E9A3-FC49-4AA8-91CE-F738BCBB7C8F}
    HKEY_CLASSES_ROOT\Interface\{261214CB-3021-4DE0-9D21-5957ACD1781A}
    HKEY_CLASSES_ROOT\Interface\{2C2EBD54-ED76-4343-902B-336D1DB63763}
    HKEY_CLASSES_ROOT\Interface\{36C9C487-E14F-4BB9-9882-AC613193EE46}
    HKEY_CLASSES_ROOT\Interface\{6A4C71B1-1A79-483A-A400-F026936CC7B7}
    HKEY_CLASSES_ROOT\Interface\{85D1E607-0C1A-4E69-BA9B-2E5FFA382D68}
    HKEY_CLASSES_ROOT\Interface\{88EB5B21-0FE7-4208-8F1C-26915F7E2432}
    HKEY_CLASSES_ROOT\Interface\{934E4898-DE90-45E1-ADF4-C383DCAE7B26}
    HKEY_CLASSES_ROOT\Interface\{BE05F07D-131C-4935-941B-0D41CEB07E67}
    HKEY_CLASSES_ROOT\Interface\{E2B951F0-9F32-4260-90F7-A988BEFF7F0C}
    HKEY_CLASSES_ROOT\Interface\{F634E01A-833A-49FB-BAE2-3A00CECC3A94}
    HKEY_CLASSES_ROOT\TypeLib\{73D7ABFE-D325-430A-817F-64C7BFD48813}
    HKEY_CLASSES_ROOT\VBDNR.cCookie
    HKEY_CLASSES_ROOT\VBDNR.cErrorLog
    HKEY_CLASSES_ROOT\VBDNR.cHistory
    HKEY_CLASSES_ROOT\VBDNR.cRegistryRoutines
    HKEY_CLASSES_ROOT\VBDNR.cScheduler
    HKEY_CLASSES_ROOT\VBDNR.cSignature
    HKEY_CLASSES_ROOT\VBDNR.cThreatLevel
    HKEY_CLASSES_ROOT\VBDNR.cUserSettings
    HKEY_CLASSES_ROOT\VBDNR.DNRDirector
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Virtual Bouncer
    HKEY_ALL_USERS\Software\VB and VBA Program Settings
    HKEY_ALL_USERS\Software\VB and VBA Program Settings\VBouncer
    HKEY_ALL_USERS\Software\VB and VBA Program Settings\VBouncer\Settings

  6. Exit the Registry Editor.