Threat Explorer

The Threat Explorer is a comprehensive resource consumers can turn to for daily, accurate, up-to-date information on the latest threats, risks and vulnerabilities.

VBS.Gnutella

VBS.Gnutella

Updated:
13 February 2007
Also Known As:
Gnutella.worm, VBS/GWV.a, VBS_GNUTELWORM, VBS.Gnut.A, VBS/Gnu

VBS.Gnutella only affects users of the Gnutella file sharing application. This worm spreads by making a copy of itself in the Gnutella program directory, then making that directory available for sharing files on the Gnutella network.

Antivirus Protection Dates

  • Initial Rapid Release version 30 May 2000
  • Latest Rapid Release version 28 September 2010 revision 054
  • Initial Daily Certified version 30 May 2000
  • 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.

This .vbs worm copies itself into the Gnutella program folder with one of the following names:
    Jenna Jameson movie listing.vbs
    Pamela Anderson movie listing.vbs
    Asia Carerra movie listing.vbs
    xxx FTP movie listing.vbs
    ASF Compressor (No quality loss).vbs
    collegesex.vbs
    Gladiator.vbs
    Battlefield Earth.vbs
    Evangelion complete episodes scripts.vbs
    Scan Master checklist.vbs
    How to eat _____.vbs
    Alicia Silverstone.vbs
    Pearl Jam.vbs
    Mp3 compressor (Half the size but same quality).vbs
    Napster Metallica Crack.vbs
    Santana.vbs
    NSync.vbs
    Nirvana.mp3.vbs
    Shania Twain.mp3.vbs
    Jesus loves you.vbs
    Gnutella upgrade.vbs
    OFFICIAL Gnutella Option Pack.vbs
It then modifies the Gnutella.ini file to allow sharing of .vbs files in the Gnutella program folder. In the body of the code, the worm maintains information about its current generation, its current name, and the date and time of infection.

Finally, the worm drops a file in the Gnutella program directory that contains the current generation, the victim's name, and the date and time of infection. This file is named Yet another GWV! VictimName.zip where VictimName is derived from information in the Gnutella.ini file.

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.

Restore Gnutella.INI from a clean backup. Delete all detected files.