SUBJECT·FILE
Mukul Joshi
HANDLE: CYB3RFY·STATUS: ACTIVE·LOCATION: PUNE, IN
Pentests web applications; competes in CTFs; teaches the rest on YouTube.
- AFFILIATION
- Army Institute of Technology, Pune (CSE, '27)
- DISCIPLINES
- Web Exploitation · Forensics · Reverse Engineering · IoT Security
- LANGUAGES
- Python, JavaScript, C/C++, Bash, SQL
- TOOLBELT
- Burp Suite, Nmap, Metasploit, Wireshark, SQLmap, Ghidra
DOSSIER NOTES
Subject presently serves as Cybersecurity Research Intern at Fenrir Security (February through May 2026), assigned to web application penetration testing, AI-driven custom skill development, automated reconnaissance pipelines, and [REDACTED — under NDA]. A prior engagement at CopperCloud IOTech (April through July 2025) covered IoT hardware security and Industry 4.0 audit work.
Subject operates the CYB3RFY channel on YouTube — 90+ instructional videos on web exploitation and capture-the-flag methodology, current following 360 subscribers. At Army Institute of Technology, Pune, subject holds the post of Secretary, ISDF cybersecurity club, and directed the Bypass CTF (542 registered teams).
INTERCEPTS·LATEST BROADCASTS — @CYB3RFY
Master Steganography : 15 Ways to Hide Data (Mr. Robot Edition)
2026-02-09 · 398 views
Reverse Engineering for CTF Beginners — The Step-By-Step Guide I Wish I Had When I Started
2025-12-03 · 862 views
Learn Web Exploitation by Solving Real CTF Challenges #ctf
2025-09-26 · 2.6K views
The ONE Tiny Clue That Solved The Entire OSINT Challenge #osint
2025-09-02 · 76 views
FILED INTELLIGENCE
Access Control & IDOR
Why the most common bug in bug bounty isn't a clever exploit — it's the server forgetting to check who's asking.
WEB · TUTORIAL · WEB-SECURITY · 16 min readServer-Side Template Injection
How template engines turn user input into remote code execution — and how to find, exploit, and fix it.
WEB · TUTORIAL · WEB-SECURITY · 16 min readSubnetting Masterclass
IP addressing, MAC addresses, subnet masks, CIDR notation, and the math behind dividing networks.
NETWORK · TUTORIAL · 7 min read