A pornography app for Android called Adult Player that promises free pornographic videos has been caught taking photographs of users and then extorting them for ransom. When a user opens the app, Adult Player secretly takes photos of the user with the help of front-facing camera and then demands a $500 (..330) ransom in order to restore the device access and delete all photos stored on attackers server. According to the researchers from the security firm Zscaler, the app isn’t available on the official Google Play Store and is distributed through adult websites.
Source: https://thehackernews.com/2015/09/hacker-blackmail.html