If you run a website which uses WordPress you need to use this plugin. https://www.wordfence.com/ WordFence is a free plugin which scans your file system and prevents hacking attempts in a multitude of ways. I have been using WordFence on all WordPress websites and it works fantastic. There is a paid version with more options, but the free versions are still a must-have tool if you run a wordpress site or even a group of wordpress sites. I would suggest using it on all of your WordPress websites.