Random picture of a lock?

[katfud]

I'm got a galaxy tab s2 and frequently when I'm in the middle of something the tablet will close down and give me a black screen with a picture of a lock and a progress bar around it.

I'll then have to re-enter my access code to get in, all aps have been closed.

Does anyone know what's going on, it's rather annoying?

 

[jasonandrews25788]

I think it's a malware or something so check all installed packages one by one using this app:
https://forums.androidcentral.com/e...s/details?id=com.ubqsoft.sec01&token=svbfbTkr