A hacker group was brazenly ramping up its antics as waves of cyberattacks targeting even the US spy agency expose how poorly defended many networks are against Internet marauders.  
 
"It's becoming a big problem, because at the end of the day these guys are doing whatever they want," said Panda computer security labs technical director Luis Corrons. "This is showing us that we have a long way to go to protect our systems and our information."  
 
The public website of the US Central Intelligence Agency (CIA) on Wednesday joined a growing list of hacker targets that has included Sony, The International Monetary Fund, and Citibank.