VBS.Monopoly

Printer Friendly Page

Updated: February 13, 2007 11:51:43 AM
Also Known As: Monopoly
Type: Trojan Horse, Worm, Virus


VBS.Monopoly is an encrypted worm that works on Windows operating systems which support Visual Basic Script 4.0 and later. The worm uses Microsoft Outlook to send a copy of itself to all the recipients in the user's Outlook Address Book. The worm usually appears as MONOPOLY.VBS in the email.

NOTE: The definition set prior to August 9 detects this worm as VBS.Freelink .

Antivirus Protection Dates

  • Initial Rapid Release version December 18, 2000
  • Latest Rapid Release version August 08, 2016 revision 023
  • Initial Daily Certified version December 18, 2000
  • Latest Daily Certified version August 09, 2016 revision 001

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Writeup By: Raul Elnitiarta

Updated: February 13, 2007 11:51:43 AM
Also Known As: Monopoly
Type: Trojan Horse, Worm, Virus


Similar to VBS.Freelink , the worm is written in Visual Basic Script. When launched, the worm drops a picture named MONOPOLY.JPG in the temporary folder. It also creates MONOPOLY.WSH and MONOPOLY.VBE files.

MONOPOLY.WSH executes MONOPOLY.VBE. The latter sends out an email message to everyone in the user's Outlook Address Book. The message has the following subject and message:

    Subject: Bill Gates joke
    Message: Bill Gates is guilty of monopoly. Here is the proof.  :-)
After executing the MONOPOLY.VBE file, the worm displays a message:
    Bill Gates is guilty of monopoly. Here is the proof.
and displays the following picture file, MONOPOLY.JPG:



Recommendations

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.

Writeup By: Raul Elnitiarta

Updated: February 13, 2007 11:51:43 AM
Also Known As: Monopoly
Type: Trojan Horse, Worm, Virus


To remove this worm, delete the MONOPOLY.VBS, MONOPOLY.VBE, and MONOPOLY.WSH files.

Writeup By: Raul Elnitiarta