From the New York Times:
In their persistent quest to breach the Internetâ€™s defenses, the bad guys are honing their weapons and increasing their firepower.
With growing sophistication, they are taking advantage of programs that secretly install themselves on thousands or even millions of personal computers, band these computers together into an unwitting army of zombies, and use the collective power of the dragooned network to commit Internet crimes.
These systems, called botnets, are being blamed for the huge spike in spam that bedeviled the Internet in recent months, as well as fraud and data theft.
Security researchers have been concerned about botnets for some time because they automate and amplify the effects of viruses and other malicious programs.
What is new is the vastly escalating scale of the problem…