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It might not seem like your site has anything to be hacked for, but websites are compromised quite often. Most of the website security breaches are usually not meant to mess with your website layout or steal your data but are instead attempts to use your server as an email relay for spam or to create a temporary web server to serve files, usually of an illegal nature. Compromised websites can also be abused in other ways such as using your servers to mine <a href="https://hackernoon.com/why-everyone-missed-the-most-mind-blowing-feature-of-cryptocurrency-860c3f25f1fb">cryptocurrency</a>, or as a part of a botnet. You can also be hit by ransomware.