Based on research conducted on malicious code from the WildList Organization -- a virus and worm clearinghouse that tracks malware actually out and in the wild on the Internet -- TruSecure's ISCA's Labs tagged 2003 as one hellacious ride.
"No doubt, 2003 was bad," said Bruce Hughes, the director of malicious code research at ICSA Labs.
The biggest news, he said, was the huge increase in what he dubs 'perimeter killer' worms, those which don't spread via the traditional method of e-mail but instead directly attack networks through software vulnerabilities and open ports to the Internet. The best examples in 2003 -- SQL Slammer, Blaster, and Nachi -- knocked out thousands of servers and workstations during the year. The number of such worms increased by 200 percent from the start of 2003 to its conclusion, according to Hughes' research.
Although mass-mailed viruses and worms like Sobig will continue to increase, albeit at a relatively slow-paced rate, most enterprises are blocking their payloads at the gateway by refusing to allow executable file attachments through to end users. Not so with consumers, who will still struggle with these more-or-less traditional security threats during 2004.