The volume of malware targeting users of mobile devices grew more than three times in 2015, compared to 2014. The most dangerous threats in 2015 were ransomware, malware capable of obtaining unlimited rights on an infected device and data stealers, including financial malware. The number of new mobile banking Trojans decreased to 7,030 from 16,586 in 2014; 94,344 unique users were attacked by mobile ransomware, a five-fold increase on 2014. Attacks were registered in 156 counties, with Russia, Germany and Kazakhstan the most hit.”]
Source: https://informationsecuritybuzz.com/study-research/the-volume-of-new-mobile-malware-tripled-in-2015/