The BBC reports Denial-of-service (DoS) attacks, have risen 50% according to the biannual Symantec Threat Report
Hackers are using techniques like bot networks, software robots running on unwitting users' machines, to silently commit fraud.
Or the bot-infected computers are used to launch DoS attacks - now running at 1,402 a day - as part of extortion attempts. Phishing attempts are approaching eight million a day.
The Symantec researchers said one growth area in the future could be hackers harvesting financial data to sell on to third parties to use in fraud.