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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

MSNWorm.FG

Threat LevelLow threatDamageHighDistributionNot widespread
Common name:MSNWorm.FG
Technical name:W32/MSNWorm.FG
Threat level:Medium
Type:Virus
Subtype: Worm
Effects:   It spreads and affects other computers, and has damaging effects on the affected computer.
Affected platforms:

Windows 2003/XP/2000/NT/ME/98/95

First detected on:Oct. 30, 2008
Detection updated on:Oct. 30, 2008
StatisticsNo

Brief Description 

    
MSNWorm.FG is a virus that also has the characteristics of a worm.
MSNWorm.FG gets into a computer via e-mail, the Internet, floppy disks, etc, and it spreads by inserting its code in other files and programs. Its effects can range from simply annoying to destructive.
Furthermore, due to its worm characteristics, MSNWorm.FG also spreads by sending out copies of itself. Its main objective is to collapse computers and networks, preventing users from working with the affected computer.

 

It reduces the security level of the computer: it terminates processes belonging to security tools, such as antivirus programs and firewalls, leaving the computer defenseless against attacks from other malware; it awaits remote-control orders received through IRC.

 

It uses stealth techniques to avoid being detected by the user:

  • It terminates processes corresponding to several security tools, such as antivirus programs and firewalls, to prevent detection.

 

It uses several methods in order to avoid detection by antivirus companies:

  • It terminates its own execution if it detects that it is being executed in a virtual machine environment, such as VMWare or VirtualPC.

 

MSNWorm.FG uses the following propagation or distribution methods:

  • Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
  • Instant messaging: it sends links pointing to a copy of itself to all users included in the infected user's contacts list.
  • Computer networks (mapped drives): it creates copies of itself in mapped drives.
  • File infection: it infects different types of files, which are then distributed through any of the usual means: floppy disks, email messages with attachments, Internet download, files transferred via FTP, IRC channels, P2P file sharing networks, etc.