Attack of the Zombie Computers Is Growing Threat - New York Times:
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 — and the precision with which some of the programs can scan computers for specific information, like corporate and personal data, to drain money from online bank accounts and stock brokerages.
“It’s the perfect crime, both low-risk and high-profit,” said Gadi Evron, a computer security researcher for an Israeli-based firm, Beyond Security, who coordinates an international volunteer effort to fight botnets. “The war to make the Internet safe was lost long ago, and we need to figure out what to do now.”