Add Hack The Box

README.md

@@ -80,6 +80,7 @@ Continuously managing risk and improving cyber security posture in complex enter
 |[Gh0stlab](http://www.gh0st.net/?p=19)|A security research network where like-minded individuals could work together towards the common goal of knowledge.|
 |[GoatseLinux](http://neutronstar.org/goatselinux.html)|GSL is a Vmware image you can run for penetration testing purposes.|
 |[Google Gruyere](http://google-gruyere.appspot.com/)|Labs that cover how an application can be attacked using common web security vulnerabilities, like cross-site scripting vulnerabilities (XSS) and cross-site request forgery (XSRF). Also you can find labs how to find, fix, and avoid these common vulnerabilities and other bugs that have a security impact, such as denial-of-service, information disclosure, or remote code execution.|
+|[Hack The Box](https://www.hackthebox.eu/)|Weekly CTFs for all types of security enthusiasts. It consists many vulnerable machines which you can hack into.|
 |[Hack This Site](https://www.hackthissite.org/)|More than just another hacker wargames site, Hack This Site is a living, breathing community with many active projects in development, with a vast selection of hacking articles and a huge forum where users can discuss hacking, network security, and just about everything.|
 |[Hack Yourself First](https://hackyourselffirst.troyhunt.com/)|This course is designed to help web developers on all frameworks identify risks in their own websites before attackers do and it uses this site extensively to demonstrate risks.|
 |[Hack.me](https://hack.me/)|Hack.me aims to be the largest collection of "runnable" vulnerable web applications, code samples and CMS's online. The platform is available without any restriction to any party interested in Web Application Security.|