Facebook users targeted by iBanking Android trojan app

A computer Trojan injects messages into Facebook to trick users into installing Android malware, researchers from ESET said

By Lucian Constantin, IDG News Service |  Security

Cybercriminals have started using a sophisticated Android Trojan app designed for e-banking fraud to target Facebook users, possibly in an attempt to bypass the two-factor authentication protection on the social network.

Security researchers from antivirus vendor ESET have identified a new variant of a computer banking Trojan called Qadars that injects rogue JavaScript code into Facebook pages when opened in a browser from an infected system. The injected code generates a message instructing users to download and install Android malware that can steal authentication codes sent to their phones via SMS.

These man-in-the-browser attacks are known as webinjects and have long been used by computer Trojans to display rogue Web forms on online banking websites with the goal of collecting log-in credentials and other sensitive financial information from users.

Webinjects are also commonly used to display messages that instruct users to download and install malicious applications on their mobile phones by presenting them as security apps required by financial institutions. In reality those rogue mobile apps are designed to steal mobile transaction authorization numbers (mTANs) and other one-time passwords sent by banks via SMS.

In February security researchers from RSA, the security division of EMC, reported that the source code for an advanced Android Trojan called iBanking was released on an underground forum and warned that this development will allow more cybercriminals to incorporate this mobile threat in their future operations.

Once installed on an Android phone, iBanking can capture incoming and outgoing text messages; can redirect calls to a pre-defined phone number; can capture audio from the surrounding environment using the device's microphone and can steal the call history log and the phone book.

The authors of the Qadars computer Trojan were quick to adopt iBanking, according to a new report by researchers from ESET, but instead of using it against online banking users they appear to be targeting accounts on Facebook.

"Through our monitoring of the banking Trojan Win32/Qadars [...] we have witnessed a type of webinject that was totally new for us: it uses JavaScript, meant to be injected into Facebook web pages, which tries to lure the user into installing an Android application," ESET malware researcher Jean-Ian Boutin said Wednesday in a blog post.

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