Long-term players will become stealthier information gatherers, while newcomers will look for ways to steal money and disrupt their adversaries," McAfee Labs report states, predicting that more small nation states and terror groups will use cyber warfare. Cyber theft increases The stealing of financial information is nothing new, with stolen credit or debit card data on the black market a well-established and lucrative business for cyber criminals. But as new ways of paying for goods, such as contactless and mobile payments, become the norm for European consumers, there's a new opportunity for hackers – particularly if retailers don't store payment data securely, Symantec told CNBC.