IT security and control firm, Sophos, says the report shows there is now evidence that hackers are extending their efforts beyond Windows and is warning computer users of all operating systems, including Mac OS and Linux not to be complacent about security.

Sophos experts also note that the low cost ultra-mobile PCs, such as the popular Linux-based ASUS EEE laptop, are likely to gain the attention of the cyber underworld as sales continue to grow.

"The ultra-mobile ASUS EEE laptop, like many others, comes pre-installed with Unix, making it automatically immune to the vast majority of spyware and malware attacks," said Cluley. "However, it's still possible to lose money through phishing and identity theft on any device with an internet connection. As it becomes more common for people to use a Wi-Fi enabled device which carries personal information, the greater the temptation for hackers to take advantage with malware in the future."

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