Redcross is a machine on hackthebox.eu, featuring sql injection, cookie reuse and a nice binary exploitation challenge, which I enjoyed a lot.
Helpline is a really fun box on hackthebox.eu, which I was lucky enough to get system first blood on :) Weirdly enough I couldn't get the user first blood - but more to that later.
In this post I will give a quick walkthrough on Giddy from hackthebox.eu. The machine involves (automated) sql injection, stealing ntlm hashes via sqli and the exploitation of vulnerable service for which a CVE exists.
Control is a 40-point windows machine on hackthebox that involves a sql injection which we use to upload a webshell. Then we modify the path of a service executable in the registry to become system.