Binary Exploitation & Teaching

pwnewi

>_ Personal blog by Youssef Ben Hsan

Low-level exploitation, CTF writeups, pwn challenge design, and cybersecurity education. I break things to understand them — then teach others how to do the same.

Explore Writeups About Me Download CV
pwnewi — bash
~$whoami
youssef@pwnewi
~$cat identity.txt
role : Binary Exploitation Researcher
focus : pwn · CTF · challenge design
mission : teach offensive security
~$ls challenges/
Blessing-Registry-Hack/ Iftar-Rush/
The-Moving-Masjid/ Bloody-Null-Bytes/
Shell-Injection/ ... 3 more
~$python3 exploit.py
[+] Got shell! $
$
Youssef Ben Hsan
8
Pwn Challenges Built
C2
English Proficiency
3
Certifications
∞
Segfaults Debugged
01 — About

Who's
behind
pwnewi.

I'm Youssef Ben Hsan, a student and self-taught researcher focused on low-level systems and offensive security. My work sits at the intersection of binary exploitation, challenge design, and education.

I design hands-on pwn challenges from scratch — writing vulnerable C programs, containerizing them with Docker, building solvers, and documenting every layer so others can learn from the process, not just copy the answer.

Beyond exploitation, I'm driven to make cybersecurity education accessible in Tunisia: from teaching kids online safety fundamentals to coaching baccalaureate students through their informatics exams.

Binary Exploitation Pwn / CTF Reverse Engineering Linux Internals C / Python Docker STEM Education Challenge Design
IDENTITY — ACTIVE
nameYoussef Ben Hsan
handlepwnewi
locationTunisia
specialtyBinary Exploitation
githubYouCanCallMeYoussef
linkedinyoussef-benhsan333
cvDownload PDF
status▸ Available
02 — Writeups

Challenge
Writeups.

CyberQuest Enet'com — CTF Competition

I authored and deployed 8 binary exploitation challenges for CyberQuest Enet'com. Each is fully containerized, ships with vulnerable C source, a working exploit script, and a step-by-step writeup detailing the vulnerability and exploitation path.

# Challenge Difficulty Category
01 Blessing Registry Hack Easy Pwn
02 Iftar Rush Registration Easy Pwn
03 The Secret Iftar Recipe Medium Pwn
04 Ramadan Event Hijack Medium Pwn
05 The Moving Masjid Hard Pwn
06 The Ramadan Journey's End Hard Pwn
07 Shell Injection Medium Pwn
08 Bloody Null Bytes Medium Pwn
03 — Initiatives

Education
Outreach.

🛡️
Cybersecurity for Kids
Delivered cybersecurity fundamentals workshops to children in a French-school context, in collaboration with SOS. Topics covered digital safety, recognizing online threats, and responsible internet habits — framed in an age-appropriate, engaging format.
📺
Free Bac Prep — Informatics
Free video content covering the informatics curriculum for Tunisian baccalaureate students. Practical, exam-focused lessons on YouTube — giving every student access to quality preparation at no cost.
Watch on YouTube →
🌍
Cybersecurity Outreach — SOS
Community outreach raising awareness about cybersecurity threats and digital hygiene among younger audiences and underserved communities in Tunisia, connected to the SOS association.
04 — Teaching

What I
teach.

01
Python Programming
Hands-on Python instruction from fundamentals to intermediate topics. Focus on practical problem-solving, scripting, and automation relevant to students' academic and professional paths.
02
Visual Programming
Block-based and visual programming environments to introduce logic and algorithmic thinking to beginners and younger students — building a solid foundation before moving to text-based languages.
03
Robotics & STEM
Robotics and STEM mentoring combining hardware interaction with software control. Students learn iterative design, problem decomposition, and applied engineering through hands-on projects.
04
Exam Informatics Support
Practical, exam-focused informatics coaching for secondary students. Systematic coverage of key topics, algorithm walkthroughs, and past-paper practice designed to maximize exam performance.
05 — Certifications

Credentials.

Alison
Master Linux and Shell Script From Beginner to Advanced
Completed 22 May 2025 CPD 2–4 hours
91%
Final Assessment
Cisco Networking Academy · Faculté des Sciences de Tunis
Notions de base sur les réseaux
Completed 22 May 2025 Issued with FST
🌐
Networking
EF Education First
EF SET English Certificate — C2 Proficient
Awarded 25 Jun 2025 Score 72/100
75
Reading
72
Listening
59
Writing
81
Speaking
C2
Proficient
View Certificate →
06 — IoT

IoT
Projects.

📡
Coming Soon
IoT and embedded systems projects are currently in development. This section will document hardware hacking, firmware analysis, and physical security research. Stay tuned.