Mohammad Nahidul Islam
Focused on offensive security — web, network, and cloud penetration testing, reverse engineering, and vulnerability research. I also mod games in my spare time, which usually means poking at the same binaries and memory structures from a different angle. I help find the weaknesses in systems before someone else does.
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ABOUT ME
I'm Md. Nahidul Islam, also known as fumioryoto. I work in cybersecurity, focused mainly on web application security, penetration testing, and reverse engineering.
Most of what I do involves taking applications apart to understand how they actually work, then looking for the places where that logic breaks down. That includes VAPT across web, network, and cloud environments (AWS, Azure), reverse engineering with Ghidra, x64dbg, and Cheat Engine, and OSINT investigations when a project calls for it. I also write my own scripts and tools when the ones available don't do what I need.
EXPERTISE
I combine security testing and technical analysis to find where systems actually break — and to document it in a way people can act on.
Web Application Security
Focused mainly on web application security — taking applications apart to understand how they actually work, then finding the places where that logic breaks down.
Penetration Testing
VAPT across web, network, and cloud environments (AWS, Azure). Manual testing built around understanding a system before trying to break it.
Reverse Engineering
Reverse engineering with Ghidra, x64dbg, and Cheat Engine — pulling systems apart at a lower level to see what's really going on underneath.
OSINT & Recon
OSINT investigations when a project calls for it — gathering and connecting information before deciding where to focus.
Scripting & Automation
Writing my own scripts and tools when the ones available don't do what I need — automation built around the actual problem, not a generic workflow.
Findings & Documentation
Every engagement ends in a report someone has to act on — clear findings, risk ratings, and remediation steps, not just a list of what broke.
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