In the past quarter McAfee collected 83 million pieces of PC malware samples, up from 75 million samples collected by the end of last year, CNET.com reported Wednesday.
McAfee also reported a significant increase in malicious software targeting the Android platform and Mac computers.
A total of 8,000 mobile malware samples were collected this quarter, of which nearly 7,000 were Android threats, mainly from from third-party app markets, it said.
With the United States being the primary source of cyberattacks, malware threats could reach the 100 million mark this year, a release from McAfee said.
E-mail continued to be a medium for targeted attacks along with an increase of so-called rootkits, a form of "stealth" malware, it said.