Bastion is an easy 20 points machine on hackthebox. It is about mounting a .vhd file over the network, retrieving password hashes from backups (via SAM) and a privilege escalation that involves stored credentials in mRemoteNG.
This short write-up is about Irked, a rather easy machine on hackthebox featuring an irc backdoor, some steganography and a simple abuse of a custom binary.
Kryptos is 50 points machine on hackthebox, involving some interesting techniques, like setting up a fake database and making the application use it, abusing a weak rc4 implementation, pivoting through a web application and injecting into a sqlite database. In addition we exploit a weak prng on a application...
Redcross is a machine on hackthebox.eu, featuring sql injection, cookie reuse and a nice binary exploitation challenge, which I enjoyed a lot.
LaCasaDePapel is a rather easy machine on hackthebox.eu, featuring the use of php reflection, creating and signing of client certificates and the abuse of a cronjob. Unfortunately the box was very unstable and slow for me and therefore pretty unenjoyable.
Curling is one of the easier boxes on hackthebox.eu, featuring getting a shell on joomla via template editing, getting a password from an obfuscated file and exploiting an insecure curl script.
Arkham was a surprisingly hard box for the 30 points that were awarded for it, as I was struggling quite a bit, especially for the user part. However in the end i enjoyed the box a lot because it forced me to use stuff I don't encounter often and...
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.
Frolic is a medium difficulty machine on hackthebox.eu, featuring a lot of CTF-ish language conversions, the usage of a public exploit for "playsms" and (simple) custom binary exploit.
Carrier is a nice, medium difficulty machine on hackthebox.eu featuring information retrieval via snmp, command injection and bgp hijacking. The bgp hijacking part was a nice learning experience as this is a technique you probably don't see every day.