Discovered: April 17, 2001
Updated: February 13, 2007 11:53:46 AM
Also Known As: VBS.Pie
Type: Worm


This is a Visual BASIC Script worm that spreads by sending itself to all addresses in the Microsoft Outlook address book. It also spreads by mIRC. The worm arrives with an attachment named Su_Premio.txt.vbs. This worm is very similar to VBS.Plan worm.

NOTE: Virus definitions dated prior to April 18, 2001, detect this as Bloodhound.VBS.Worm.

Antivirus Protection Dates

  • Initial Rapid Release version April 18, 2001
  • Latest Rapid Release version September 28, 2010 revision 054
  • Initial Daily Certified version April 18, 2001
  • Latest Daily Certified version September 28, 2010 revision 036

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

Writeup By: Gor Nazaryan

Discovered: April 17, 2001
Updated: February 13, 2007 11:53:46 AM
Also Known As: VBS.Pie
Type: Worm


When executed, VBS.Pie@mm does the following:

  1. It copies itself to the hard disk as the following files:
    • \Windows\Su_Premio.txt.vbs
    • \Windows\System\Su_Premio.txt.vbs
  2. The worm changes the security level of Microsoft Word to 1, and it turns off macro virus protection in Word.
  3. It sends itself to all addresses in the Microsoft Outlook address book as:

    Subject:
    Aquí está SU PREMIO !
    or
    NUEVO BIRUS (¡¡cuidado!!)

    Message:
    Usted o quizás alguna de sus amistades en internet completó pocos días...
    or
    NEW BIRUS es un nuevo birus que se transmite por internet...
  4. It creates the following files:
    • \Windows\Spamming.vbs
    • \Start Menu\Programs\StartUp\icq2000b.lnk
  5. It then deletes the following folders, if they exist:
    • C:\Mis Documentos
    • C:\My Documents
    • C:\Meus Documentos
    • C:\Meine Dokumente
    • C:\Miei Documenti
    • C:\Mes Documents
  6. VBS.Pie@mm searches all files on local and network drives, and overwrites files the have the extensions .vbs, .vbe, .js, .jse, .css, .wsh, .sct, .hta, .jpg, and jpeg. Files with extensions of .mp2 and .mp3 are hidden by setting the hidden directory attribute.
  7. The worm overwrites the mIRC Script.ini file to send itself out to mIRC users.


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: Gor Nazaryan

Discovered: April 17, 2001
Updated: February 13, 2007 11:53:46 AM
Also Known As: VBS.Pie
Type: Worm


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.Pie@mm.
  4. Using Windows Explorer, delete the following files:
    • icq2000b.lnk. This will be found in the \StartUp folder, the location of which can vary.
    • Spamming.vbs from the \Windows folder.
  5. (Optional) Search all local hard drives for hidden .mp2 and .mp3 files, and remove the hidden attribute.
  6. (Word 2000 users only) Change the security level of Microsoft Word back to the desired level by clicking the Tools menu, clicking Macro, clicking Security, and choosing the desired level.


Writeup By: Gor Nazaryan