Ubuntu 18.04 wierd symbol above status bar, is my system hacked?

I am having this weird icon in Ubuntu 18.04 from a few days. My laptop is having a wierd black icon in the shape of a person just above the status bar. You can check it at screenshot below

If I restart my system, it disappears but it randomly appears. I am not sure what it is and it feel as if my system is hacked or something. If anyone knows about this, please let me know.