Original URL: http://www.theregister.co.uk/2012/07/09/android_trustgo_china_mobile/

Android Trojan leaves 100,000 users out of pocket

MMarketPay buys content from China Mobile's app store

By Phil Muncaster

Posted in Phones, 9th July 2012 06:14 GMT

Security researchers are warning of yet another Android malware outbreak which has spread to nine app stores and infected 100,000 with code designed to covertly purchase apps and content from China Mobile’s Mobile Market.

Mobile security firm TrustGo explained that the MMarketPay.A Trojan could be hidden in a number of legitimate-looking applications, including those from Sina and media streaming company Funinhand, as well as travel and weather apps.

The malware has already been placed in nine different third party Android app markets in China, infecting over 100,000, the firm said.

Once downloaded, the Trojan will automatically place orders for paid content and apps at China Mobile’s official Mobile Market online store without informing the user.

It is able to intercept China Mobile’s verification SMS and post the code to the Mobile Market web site in order to complete the purchase, said TrustGo.

In the event of CAPTCHA being triggered at this stage, the malware will apparently send the relevant image to a remote server for analysis.

The advice from the security experts at TrustGo is for users to only download Android apps from trusted app stores and to have some form of real-time mobile security scanner installed on their device to prevent any dodgy downloads.

Visiting an apparently legit app store is no guarantee you’re going to get a malware-free experience, however.

Malware is frequently turning up on the official Android marketplace Google Play – although admittedly less frequently than on some of the more dubious third party sites.

The latest discovery came at the tail end of last week when researchers found malware that lifts the victim’s location data and address book info.

China in particular has been a hotbed of malicious Android activity for some time.

In April, the Chinese authorities were forced to publically reprimand the country’s two biggest mobile carriers, China Mobile and China Telecom, after uncovering “many problems” in their respective app stores.

Globally too, Android continues to be a favourite with cyber criminals.

Security firm Trend Micro is predicting the discovery of 129,000 malicious apps by the end of the year and has compiled this handy infographic detailing the main threats. ®