X-0R

Salah Chafai

Security Researcher & Exploit Developer

About

Profile

Aut viam inveniam aut faciam

Visitors

11096
unique visitors
113
countries

    CTF Achievements

    ──── podium & top finishes ─────────────
    • 1ST Black Hat MEA 2025 Quals · MEA region · top 15 globally
    • 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 2026
    • Black Hat MEA finals 2025
    • Cyber Tech Olympics 2025
    • ASCW finals 2025
    • CSAW finals 2025

    Experience

    1. Securinets

      September 2024 – Present · 2 roles
      1. Technical Lead July 2026 - Present
      2. Technical Instructor September 2024 - June 2026
        • Sustained 100% uptime at events hosting 400+ participants by operating isolated, containerized challenge infrastructure with automated deploy and teardown.
        • Delivered hands-on secure-coding and binary-exploitation workshops to students from 10+ universities.
        • Authored exploitation and reverse-engineering challenges modeling real-world memory-safety and logic flaws.
    2. EY

      1. Security Engineering Intern June 2026 - August 2026
        • Designed and threat-modeled Bastion, a hardened Linux platform that delivers encrypted competition content and blocks AI-assisted cheating through kernel lockdown, LSM execution policy, egress allowlisting, and TPM 2.0 attestation.
        • Engineered the key-release pipeline (AES-256-GCM, per-user HKDF keys, HashiCorp Vault/HSM, mutual TLS 1.3), ensuring no key material ships in the image and a compromised session cannot expose another user's content.
        • Penetration-tested an Android banking app and its backend, identifying 3 exploitable vulnerabilities, including missing admin-console MFA and an email-flood DoS.
    3. Cargo One Express

      1. Web Security Engineer October 2025 - December 2025
        • Shipped the company's internal recruitment platform end to end, adding OAuth 2.0 authentication and encrypted at-rest storage so applicant documents and PII were never stored in plaintext.
        • Enforced least-privilege role-based access control with server-side authorization on every API endpoint, preventing cross-account reads of applicant records.
    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 September 2023 - June 2028
        • Pursuing a National Engineering Diploma (Diplôme National d'Ingénieur): five-year integrated program, equivalent to a Master's degree
        • Relevant coursework: Ethical Hacking & Cybersecurity, Operating Systems & Virtualization, High-Speed Networks, Algorithms & Data Structures
        • Languages: Arabic (native), English (fluent), French (basic)
    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