Over the past week, researchers at Finnish security company F-secure have identified what they say is the first use of Storm's massive "botnet"--a collection of hundreds of thousands of computers hijacked with hidden software--to steal users' banking information.

FORBES: Storm For Rent

For nearly a year, cyber-security researchers have tracked the Storm worm as its malicious code spread across the Internet, drawing computers into a growing botnet of hijacked computers.

FORBES: Storm For Rent

The Storm worm's final purpose still isn't clear: Some security experts worry that its massive botnet could be turned on government Web sites to flood them with denial of service attacks.

FORBES: Zombie Storm Rising