Google has been taking some steps to address the problem of malware on the Android platform in recent months, introducing the Bouncer antimalware system and some better anti-exploit technologies in Jelly Bean. Now, the company is implementing some additional security features designed to protect users from malicious apps and malware that tries to send premium-rate SMS messages. Android 4.2 will include a function that can detect when a user s phone is attempting to send a message to a premium rate number and will alert the user.
Source: https://threatpost.com/google-adds-malware-scanner-jelly-bean-42-110612/77188/