Spam and malware continued to increase through May, with spam volumes up 27.7 per cent; and malware up 28.7 per cent, according to analysis of Internet threats by managed security service, Network Box.  The number of viruses originating from the UK has also risen over last month; the UK is now responsible for three per cent of the world's malware (from less than two per cent last month).

The US and Korea are the source of most of the world's Internet threats, with the US being responsible for 17.2 per cent and Korea responsible for six per cent of all viruses . Both feature in the top three sources of spam, too: the US produces 11.4 per cent of spam; Brazil comes in second at eight per cent; and Korea third at 4.2 per cent.

The proportion of phishing attacks has reduced slightly from last month, to just over 20 per cent of all viruses (down from 24.6 per cent in April).

According to Simon Heron: "The growth in Internet threats has slowed slightly from the massive 63 per cent we saw last month, but clearly in terms of volumes spam and malware are still rising significantly. We're still seeing the same suspects responsible: namely, the US and Korea."

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