Zetta is a hard box in which you have to leak the machine’s IPv6 address to be able to gain access. After that, rsync credential bruteforcing and a SQL injection lead to privilege escalation to root.
AI is a medium difficulty box that we own by exploiting an SQL injection through an audio file on an ‘Artificial Intelligence’ software. After that we escalate to root abusing a JDWP instance that is running locally.
Wall is a medium difficulty machine that we own by exploiting an RCE vulnerability in Centreon and then escalating privileges using a SUID binary.
Heist is an easy box in which we first crack found creds on the website to access RPC. From there we enumerate users and use one of them with the previously obtained passwords to log into WinRM. We find out that a Firefox process memory dump in the disk and analyze it to discover credentials that allow us to escalate to Administrator and own the box.
Chainsaw was quite an interesting and difficult box involving some blockchain programming. After I finished the box, I found out that root could also be done with blockchain programming but I just hijacked the path to finish it up; you can check out some other writeups if you are interested in seeing that root method. Anyways, let us begin!
Pseudo is the toughest challenge on HTB in my opinion as of 2019 (well, before headachev2 released). Nothing even comes close to this reversing challenge, which centers around an aarch64 and VM crackme. Before I start, I would like to thank davidlightman for working on it with me. He taught me many new reversing tricks and, oftentimes, managed to see things which I missed.
Networked was a fun and easy box, requiring us to dig a little deeper into bypassing file upload limitations to gain initial foothold. Enumeration is key, and being able to comprehend php and bash is advised.
Jarvis is a medium difficulty box in which we are able to inject SQL to get credentials into a phpmyadmin instance. We use a phpmyadmin metasploit exploit to gain a shell on the machine as www-data. www-data has sudo access as pepper user to a python script which we escape into a bash shell and then use to exploit a SUID binary to get root.