Is everyone being attacked by Gridbox?

Hello,
All of my client websites are being attacked by Gridbox. As you can see in the screenshot, this happens very often and from various locations around the world. All of my sites are up to date with the latest updates, but I still can’t afford to take any risks.
I’ve installed HTProtect, but I’m still concerned.

What about Gridbox’s security? Should I be worried?
Regards
Soner

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