"As the authors of Zeus and SpyEye have started to be located by authorities and are starting to have issues putting out their stuff, we're starting to see more new botnet-building SDKs [Software Development Kits] being released into the black market," he said.

That has increased the number of campaigns, the number of strains and the number of mutations, which increases the number of samples McAfee collects, he added.

Mobile malware continues to grow, McAfee reported, with more than 7,000 Android threats being collected and identified during the quarter. That's more than a 1,200 percent increase over the previous quarter.

Much of the Android infections are being spread by software distributed by third-party retailers, Wosotowsky observed. "The official Google apps store [Google Play] doesn't have very many malicious applications on it," he said.

Most mobile malware is designed to surreptitiously send text messages to premium SMS services. Cyber bandits get a cut of the charges for each message and disappear before a victim can protest to his or her wireless provider.