Default [Q] Unknown app using data in background

Hello

Today in the data usage overview I noticed an app at the top of the list called '10137' using the most data on my device. (Nexus 4, Android 4.4.2)
I have no idea what it is and what it does. Can't find it in the settings in the "all apps" list either.

Any ideas if this is malicious software? And if so, how can it be removed?
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