Sucuri offers a combination of preventative security and post-incident security services. A cloud hosted web application firewall sits transparently in front of your server to prevent attacks. Additional site security software can be installed on premise to monitor for hacks as well as assist in cleaning them up after.
Sucuri is the de facto standard in website malware monitoring and cleanup. You get hacked, get a virus or trojan, we clean up the mess! No need to worry about malware anymore.