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Hackers are stepping up the assault on all Android handsets

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January 18, 2016

It's reported today that hackers are stepping up their assaults on Android mobile handsets and are now quietly redirecting many phone calls to steal voice-based two factor authentication details.

The scheme has been going on for the last three weeks but was first reported only today.

An update to the Android.Bankosy trojan horse means it not only locks down handsets but also steals data from hacked Android devices.

Symantec security worker Dinesh Venkatesan says the trojan malware opens up a backdoor which turns on unconditional call forwarding and silent modes such that victims are never alerted about having redirected incoming calls.

"To improve the security of OTP (one time password) delivery, some financial organizations started delivering OTP through voice calls instead of SMS," Venkatesan said.

And in case you didn't know, Android.Bankosy gets a unique identifier for the infected device in C&C communication.

Once the malware is installed on the victim’s device, it opens up a backdoor, collects a list of system-specific information, and sends it to the command and control server to register the device and then get a unique identifier for the infected device.

"If the registration is successful, it uses the received unique identifier to further communicate with the C&C server and receive commands," Venkatesan added.

It can also intercept and delete incoming SMS messages, wipe data, and capture phone calls, Venkatesan also asserted.

Source: Symantec Security.

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