Over 800 different Android apps that have been downloaded millions of times from Google Play Store found to be infected with malicious ad library that silently collects sensitive user data and can perform dangerous operations.
Dubbed “Xavier,” the malicious ad library, initially emerged in September 2016, is a member of AdDown malware family, potentially posing a severe threat to millions of Android users. Since 90 percent of Android apps are free for anyone to download, advertising on them is a key revenue source for their developers. For this, they integrate Android SDK Ads Library in their apps, which usually doesn’t affect an app’s core functionality.