The first quarter was the most active in malware history and mobile attacks are moving to the forefront, according to McAfee data. Android attacks are also picking up.

McAfee's first quarter threat report noted that attacks surged in the first quarter, but spam has fallen. In fact, there were 6 million unique malware samples in the first quarter, the highest ever for the first three months of the year. February had the most new malware samples---2.75 million.

Fake anti-virus software---think Mac Defender---reached its highest levels in march with 350,000 unique samples.

As for emerging threats, McAfee noted that Android devices are becoming malware havens. Android was the second most popular environment for mobile malware behind Symbian in the first quarter. Historically, Android remains No. 3.

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In its report, McAfee said: