Threat Explorer

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12 October 2001
13 February 2007
Also Known As:
I-Worm.Lee.b, VBS/Pica.worm.gen, VBS.Lee@mm

VBS.VBSWG.D@mm is a simple worm that copies itself to the hard disk as C:\Windows\System32\Independance Day.vbs. It then sends this file to all contacts that are in your Microsoft Outlook address book.

Antivirus Protection Dates

  • Initial Rapid Release version 12 October 2001
  • Latest Rapid Release version 28 September 2010 revision 054
  • Initial Daily Certified version 12 October 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 VBS.VBSWG.D@mm is executed, it does the following:
It creates the file C:\Windows\System32\Independance Day.vbs.
It sends an email message to all contacts that are in your Microsoft Outlook address book. The message has the following characteristics:

Subject: Mail from:
The Best Firewall under Windows is...> BlackIce.
BUGFIX des Monats:
Windoof 2000.
Du kannst Dich, auf jedem Windoos 2000 Server als Gast einloggen.
Und hast trotzdem vollen Zugriff auf fast alle gesperrten Dateien, auf die normale
Anwender keinen Zugriff haben dürfen.
Wie zb. die Boot.ini...ts..ts..ts

99% aller Pc Probleme befinden sich zwischen Tastatur und Stuhl.
Die, die können, tun. Die, die nicht können, simulieren.
Ein Hacker macht einen Fehler nur einmal versehentlich. Dann immer mit Absicht.
Wenn 2 sich 1 sind und nicht 8 geben, dann sind es in 9 Monaten 3.
By Euer Lee

Attachment: Independance Day.vbs

Finally, the worm adds the registry key

HKEY_CURRENT_USER\Software\Independance Day\mailed


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.

Run LiveUpdate to make sure that you have the most recent virus definitions.
  1. Start Norton AntiVirus (NAV), and make sure that NAV is configured to scan all files. For instructions on how to do this, read the document How to configure Norton AntiVirus to scan all files.
  2. Run a full system scan.
  3. Delete all files that are detected as VBS.VBSWG.D@mm.

Writeup By: Douglas Knowles