A new report from security company McAfee says that since January an estimated 12 million computers have been infected with malware and turned into zombies, making them part of botnets, and that these zombie numbers have increased by 50% since last year.
At 18%, the US hosts the largest number of infected machines, followed by China with 13%.
Jeff Green, senior vice-president of McAfee, said:
“The massive expansion of these botnets provides cyber-criminals with the infrastructure they need to flood the web with malware."
"Essentially, this is cyber-crime enablement."
