Software engineer · tinkerer

Luis Rosario

I build, analyze, and break things. I like to understand concepts at a low-level.

The three-headed beast isn't so secure: What is kerberoasting and how does it work?

The kerberos protocol is the preferred authentication protocol for 100s of thousands of enterprise Active Directory environments around the world. The protocol marked the transition from the transaction of NTLM hashes over the wire to an intricate system of tickets and services.…

#cyber #attack

Jul 15 2026Concept Analysis

Accidentally Left The Door Wide Open | How A Misconfigured Linux Binary Hands Over Root

A process on the computer spawns a shell out of nowhere with root privileges. This situation is likely to make any blue team member question the legitimacy of the process in question. However, what if I told you this behaviour was possible not because of some sophisticated attac…

#cyber #linux

That's the beginning.