Suspicious about hidden and possibly built in app android: system (Not Android system )

[Android Central Question]

I am feeling suspecious about hidden app in my android device named "android:system " while another basic built in app Android system is normal.
This suspicious app is not listed in installed apps nor in system apps. While I was using Internet data control program, it started requests for Internet connection. While original Android system was also there.
Now I need your help if this app is malware or normal?
Please help if anybody know.
Thanks,
I'm using android version 5.1.1.

 

[belodion]

What device?