WARNING: There will be spoilers to obtaining the 5 keys on JIS-CTF VM from Vulnhub. This is your warning! If you wish to penetration test this machine, do not scroll down much further.
General disclaimer: I am by no means an expert penetration tester nor do I have a lot of experience doing penetration testing. This walkthrough is from the perspective of an amateur whom is trying to become better. The goal is for me to eventially take the OCSP. That being said, I had a bit of help from some colleagues from my company getting started but they by no means gave me the answers. I will be posting some of my hardships from a beginner perspective.