Hi there,
I have 9+ years of experience in PHP/MySql and Linux and 400+ reviews on Freelancer with 99 percent completion rate. Please check my profile.
I can restore all your websites on the server, I need root access, to check the issue. Please let me know if you have a back up of the sites.
I have worked on similar projects earlier on Freelancer including server security and hardening, malware cleanup etc.
Looking forward to work for you. Lets get this done fast. Quality work will be delivered
Best Regards,
Syed