Image (derived) courtesy of Flickr user espensorvik.
Odd charges on cellphone statements
Not all malware will linger after infecting devices, especially if it has a financial bent. "Some of the malware is opportunistic, and the installer is basically a wrapper for free Angry Birds," said Sean Sullivan, security advisor at F-Secure Labs, via email. "The installer has you submit to a EULA that says you will subscribe to an SMS subscription, then it installs the free version of Angry Birds that you can download for free."
What users may end up with, of course, is not just the free version of Angry Birds, but also a financial hit in the form of SMS messages sent to premium numbers and billed to their account. These SMS scams are much more prevalent in China and Eastern Europe than in the United States, where Android users are more likely to encounter Trojan apps or fraud attempts based on social engineering, rather than texts to premium SMS numbers.
If consumers spot strange charges, their best strategy is to give their operator a call and say, 'Can you please tell me what these charges are?'" said Marc Rogers, principal security researcher at mobile security firm Lookout, speaking by phone. Likewise, don't be afraid to call your bank if you think you may have been exposed to a banking Trojan.