From blog.sucuri.net
One of the most important monitoring tools in our security platform is our Sucuri SiteCheck scanner. It’s a free tool to scan your website for known malicious content and malware injections. The usage of SiteCheck also allows us to monitor trends in the website security landscape, and one of the things that it can spot are JavaScript-based credit card skimmers, often referred to in the security community as #MageCart infections.