Operating System
Andorid 9.0
Device model
Samsung Galaxy J7 2017 J730F/DS
Current issues and symptoms
battery drain, virus infection, crpytominer
Steps taken in order to remove the infection
1. Factory reset the system
2. Modify background running policy of social media applications
3. Disable weather
4. Location accuracy set to Phone only and disabled WiFi and Bluetooth scanning
5. Disable Smart Network Switch
6. Disable Google Search app, Voice Assistant


New Member
I'm the owner of the Samsung Galaxy J7 2017, which suffers from huge battery drain issue since Android N. Since I'm relatively new to device security world, I would like to know how can I find the infection and remove it.
Which apps should I install to diagnose it ? I tried with some task managers, but with no result.
Here are some screenshots from battery usage stats:

I tried bunch of things, some of them worked, some didn't and some stopped working. Phone generally isn't hot when idle, except when I'm in car (when driving) and when signal is generally poor. The thing I should also point out, battery life is much shorter when roaming than in domestic network. You can see that I'm in roaming as you can see on pictures.