Hidden Device Admin Detector APP
Recent discoveries of the Obad family of malware show that malicious apps can leverage an Android vulnerability to hide themselves from discovery and removal more details: http://blog.trendmicro.com/trendlabs-security-intelligence/cybercriminals-improve-android-malware-stealth-routines-with-obad/
This app will scan your device for the hidden malware and aid you in removing the device administrator setting so you can remove the malware.