X-0R

Salah Chafai

Security Researcher & Exploit Developer

About

Profile
❯neofetch
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OS
Salah Chafai (arch, btw)
Role
Security Researcher / Exploit Developer
Focus
PwnReverse EngineeringLow-Level
Stack
CPythonx86-64 ASMRustShaders
Shell
zsh
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I do stuff.

Visitors

5081
unique visitors
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countries

    CTF Achievements

    ──── podium & top finishes ─────────────
    • 1ST CyberTEK 3.0
    • 1ST Securinets Tekup Spooky CTF
    • 2ND G-CUP 2026 CTF
    • 3RD CSAW 2025 finals
    • TOP 4 BrunnerCTF · 1,158 teams
    • TOP 17 DEF CON 34 Quals
    ──── international finals · qualified ─────
    • Black Hat MEA finals 2025
    • Cyber Tech Olympics 2025
    • ASCW finals 2025
    • CSAW 2025

    Latest Posts

    View All Posts (11)

    CyberTEK 3.0 - PWN Writeups

    2026-05-03 16 min

    Writeups for the four pwn challenges from CyberTEK 3.0.

    View Post →

    Securinets Darkest Hour 2026 - Pwn Writeups

    2026-02-18 9 min

    I will only post writeups for blooded challenges. I will release the others once someone bloods them.

    View Post →

    Securinets Friendly 2025 - Pwn Writeups

    2025-09-21 8 min

    This post contains quick writeups for all the binary exploitation (pwn) challenges from the Securinets Friendly 2025 CTF competition. The challenges a...

    View Post →

    Experience

    1. Securinets

      September 2024 – Present · 2 roles
      1. Technical Lead July 2026 - Present
      2. Technical Instructor September 2024 - July 2026
        • Authored original Pwn and Reverse Engineering CTF challenges, engaging 400+ participants per event.
        • Delivered hands-on workshops on binary exploitation, training students from 10+ universities in practical pwn and RE techniques.
        • Developed and maintained fully containerized, load‑resilient challenge infrastructure, delivering uninterrupted 100% uptime across all competition periods.

    2. EY

      1. Cybersecurity Engineer (Internship) July 2026 - August 2026

    3. MyDriveID

      1. Web Security Engineer October 2025 - December 2025
        • Built a secure web application for recruitment, implementing encrypted storage for applicant documents and robust OAuth-based authentication.
        • Developed employer dashboards for reviewing applications, allocating tasks, and tracking work time, enhancing operational efficiency.
        • Strengthened system security by enforcing access controls, secure API interactions, and end-to-end encryption, reducing risk of unauthorized data access.

    4. FL1TZ

      1. CTF Player September 2024 - Present
        • Consistently achieved top rankings in competitive CTFs at both national and international levels.
        • Qualified for prestigious competitions including Arab Security Cyber Wargames, Blackhat, Cybersecurity Tech Olymics & CSAW
        • Specialized in Pwn and Reverse Engineering categories across multiple CTF formats

    5. INSAT

      1. ICT Engineering Student 2023 - May 2027
        • Pursuing National Engineering Diploma in Computer Networks and Telecommunications
        • Specialized coursework in Operating Systems & Virtualization, Embedded & Real-Time Systems
        • Focus on High-Speed Networks & Mobile Protocols & Cybersecurity

    6. Phantom Penguin

      1. Lead Game Developer November 2020 - 2022
        • Led a cross-functional team of 6 developers to deliver 5+ desktop and mobile game titles from concept to release.
        • Coordinated task allocation and conducted structured code reviews, increasing team productivity by ~40%
        • Stabilized release builds through systematic testing and pre-release triage, achieving 100% on-time deliveries