Apps can spy on other apps: Hackers say

There's a sneaky new security threat to smartphones: apps that spy on the data from other apps. Security researchers found that a malicious app can disguise itself as something harmless, like a wallpaper app, but run in the background to record what the user is doing in other apps. Researchers were able to see the social security number typed into the H&R Block app, and steal the check images taken by the Chase banking app.

These malicious apps don't require special permissions to tap into the device's shared memory, so it can be hard to detect this scam.