When Apps Secretly Team Up to Steal Your Data

When the researchers set DIALDroid loose on the 100,206 most downloaded Android apps, they turned up nearly 23,500 app pairs that leak data. More than 16,700 of those pairs also involved privilege escalation, which means the second app received a type of sensitive information that it’s typically forbidden from accessing.

https://www.theatlantic.com/technology/archive/2017/04/when-apps-collude-to-steal-your-data/522177/