Businesses can expect to face a heightened threat environment in 2013, thanks to the growing sophistication of phishing attacks and an increase in "drive-by" exploits targeting social networking sites, says Adam Kujawa of anti-malware vendor Malwarebytes. He notes that malware writers are targeting poorly secured websites with new strains of ransomware and remote-access Trojans and going through platforms such as LinkedIn and Skype.

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