MS-DOS

VBS.O is a Trojan, which although seemingly inoffensive, can actually carry out attacks and intrusions.

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

• It uses techniques included in its code to hide itself while it is active.

VBS.O does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.