Sucuri free malware scan tool can’t be a complete scan, and says so. There are many types of attacks that their firewall could block that the quick scan won’t notice.
Perhaps if you send me a private message through here, with your URL I can see something; I’m good at troubleshooting WordPress site issues. Or lets talk. Or, sign up with Sucuri for their firewall and cleanup.
@lernerconsulting is right.
@anespa the Sucuri Scanner WordPress plugin is not intended to be used as an unique tool to prevent your site from being targeted by malicious people. The plugin is just a tool to provide visibility, it is up to you to do something with the information that it provides. If you are interested Sucuri offers a web application firewall [1] that will block a myriad of attacks and keep your website protected. We also provide the service to clean website [2].
There is a wide range of security services provided by many companies in the market, so feel free to choose the one that you consider works best for you.
[1] https://sucuri.net/website-firewall/
[2] https://sucuri.net/website-antivirus/
[3] https://www.google.com/search?q=web+application+firewall
