Threat Explorer

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03 April 2001
13 February 2007

VBS.Futonik.A@mm sends itself to email addresses in the Microsoft Outlook address book. It overwrites files on local and remote drives, including files with the extensions .vbs, .vbe, .js, .txt, .bmp, .htm, .html, .gif, .jpg, and .htt. The contents of most of these files are replaced with the source code of the worm, destroying the original contents.

NOTE: Due to a bug in the virus code, in some cases files with the extensions .hta, .htt, .htm, .html, or .asp will be infected by the worm, instead of being overwritten. If this happens, the viral code will execute prior to executing the original file.

VBS.Futonik.A@mm also infects the Microsoft Word global template,

Antivirus Protection Dates

  • Initial Rapid Release version 03 April 2001
  • Latest Rapid Release version 28 September 2010 revision 054
  • Initial Daily Certified version 03 April 2001
  • Latest Daily Certified version 28 September 2010 revision 036
  • Initial Weekly Certified release date pending
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When executed, VBS.Futonik.A@mm does the following:
  1. It associates files with extensions .js, .txt, .gif, .jpg, .htt, .bmp, .htm, .html, .shs, and .sct with .vbs files.
  2. It creates a link to the virus writer's Web page in the C:\Windows\System\Favorites\Satanik Child's Message.url file.
  3. It copies the viral source code to the files:
    • C:\Windows\F__ku.vbe
    • C:\Windows\System\F_ku.vbs
    • C:\\Windows\System\F__ker.hta
  4. VBS.Futonik.A@mm then overwrites files on local and remote drives, including files with the extensions .vbs, .vbe, .js, .txt, .bmp, .htm, .html, .gif, .jpg, and .htt. The contents of most of these files are replaced with the source code of the worm, destroying the original contents. In some cases, files with the extensions .hta, .htt, .htm, .html, or .asp will be infected by the worm.

    CAUTION: Do not attempt to run files that have been overwritten or renamed by this worm. If you do, the worm is executed again.
  5. The worm uses MAPI calls to Microsoft Outlook, and it creates messages by going through all of the addresses in the Microsoft Outlook Address Book. The worm uses the Windows registry to keep track of those who have been sent the message, so that each is sent only one email message. This email message has the following characteristics:

    Subject: F__K YOU!
    I SAID F__K YOU!

    Attachment: F__ker.hta
  6. The Microsoft Word Version is changed to 666.
  7. The Registered Owner is set to s@t@n1k ch1ld.
  8. The Registered Organization is set to s@t@n1k cre@ti0nz.


Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.

To remove this worm:
  1. Run LiveUpdate to make sure that you have the most recent virus definitions.
  2. Start Norton AntiVirus (NAV), and run a full system scan, making sure that NAV is set to scan all files.
  3. Delete any files detected as VBS.Futonik.A@mm.

Writeup By: Douglas Knowles