A pair of campaigns designed to spread ad fraud malware through supposedly innocuous Android applications generated between 8.5 million and 36.5 million downloads before Google removed the apps from its online store.
A malware operation reportedly has been tricking millions of Android device owners into infecting themselves with the Ztorg rootkit trojan by enticing them with offers from ad networks and apps that pay users for installing content.
Banking malware targeting mobile users requires little tech know-how to develop and operate, so it stands as a recurrent battle for security professionals.