Crispus Houessou-Adin#
Network Security Administrator · CTF Player · Cybersecurity Enthusiast
I am a cybersecurity professional based in Paris, France, currently preparing a Master’s degree in Cybersecurity and Cloud. My work sits at the intersection of network security, defensive security, offensive security, hands-on labs, and continuous technical research.
I currently focus on securing network environments while strengthening my offensive security skills through penetration testing practice, Hack The Box challenges, vulnerability research, and technical write-ups.
What I do#
My day-to-day work and personal research are centered around practical cybersecurity topics:
| Area | Focus |
|---|---|
| Network Security | Infrastructure hardening, monitoring, segmentation, secure administration |
| Offensive Security | Reconnaissance, exploitation, privilege escalation, post-exploitation methodology |
| CTF & Labs | Hack The Box machines, lab documentation, attack-path analysis |
| Vulnerability Research | CVE analysis, proof-of-concept review, remediation guidance |
| Purple Teaming | Detection engineering, attack simulation, SIEM-oriented lab environments |
| Technical Writing | CTF write-ups, tool guides, cyber notes, exploit breakdowns |
Background#
I hold a Bachelor of Science in Network Security and continue to build expertise through professional experience, self-directed research, and hands-on labs.
My technical path combines defensive foundations with offensive methodology: understanding how systems are attacked in order to better secure, monitor, and harden them.
This blog#
This website is my personal knowledge base and publication space. I use it to document what I learn, share practical cybersecurity content, and keep a public record of my technical progression.
You will mainly find:
- CTF write-ups with clear attack paths and lessons learned
- CVE analyses with impact, exploitation logic, and remediation notes
- Tool guides for reconnaissance, networking, proxying, and offensive workflows
- Cyber labs around detection, purple teaming, automation, and infrastructure security
- Personal notes from my learning journey in offensive security
The goal is simple: produce useful, reproducible, and well-structured cybersecurity content.
Selected work#
A few public projects and topics I have worked on:
- OSCP Notes - structured notes and resources for offensive security preparation
- CVE-2023-50564 Pluck CMS PoC - proof of concept and vulnerability documentation
- CVE-2023-4220 Chamilo LMS - exploitation script and technical notes
- Hack The Box write-ups - practical walkthroughs and methodology breakdowns
- Cyberlab / Purple Team environments - Wazuh, Caldera, honeypots, and detection-oriented labs
Current interests#
I am especially interested in:
- Active Directory security
- Linux and Windows privilege escalation
- Web exploitation
- Exploit development basics
- Detection engineering and SIEM use cases
- Automation for cybersecurity documentation
- Building better workflows for CTF and research write-ups
Contact#
If you want to connect, discuss cybersecurity, collaborate on a project, or exchange around CTFs and labs, feel free to reach out.
- LinkedIn: Crispus Houessou-Adin
- GitHub: Rai2en
- X / Twitter: @0xR4zn
- Email: r4izen777@gmail.com
Breaking things to understand them. Securing systems by learning how they fail.