Website fix - small project

Need a security analysis & cleanup for my web site that was compromised. Started noticing some days ago that some servers reported e-mails with links to one of my sites as SPAM, after which I have looked at google analytics. There, it was seen that something was suspsicious, however, not critical. Now it is confirmed that the website has been compromised - sites are taken offline and I have to get it cleaned up. I am specifically looking for the following elements: 1) Clean up everything on my server (4 websites in total) 3) Develop state of the art protection for main site, three will remain offline. Estimated time is 2-4 hours of work.