Mohammed Rinshan | NightWalker - Ethical Hacker & Security Portfolio

// about

Everything here was figured out the hard way — no shortcuts, no laptop, just a phone and a lot of hours.

Whatever I get curious about, I go all in — sometimes for hours at a stretch, until I actually understand it.

That curiosity has a fixed point: ethical hacking. It's a dream that goes back to Class 4, and it's the one subject I've never stopped coming back to since. Somewhere between then and now it turned from a fascination into the thing I'm actually building a future around.

The catch is that I've never had a laptop. Everything — every tool, every experiment, every project — has run on a single unrooted Android phone with 4GB of RAM and 64GB of storage. It's slower than it should be, but it hasn't stopped the work.

Outside security research, I like building things — apps and websites, mostly, working alongside AI tools to bring ideas to life despite having no laptop. The five projects below are what's come out of that so far.

Online, I go by NightWalker — same handle on Instagram, @nightwalker.ofc.

locationMalappuram, Kerala, IN

educationPlus Two · Humanities

focusEthical Hacking / Security

languagesEnglish, Malayalam

builds_with1 phone, AI-assisted tooling

handle@nightwalker.ofc

github@NIGHTWALKEROFC

linkedinMohammed Rinshan

x@NIGHTWALKER009

// skills

What I actually know, split honestly by what I've touched vs. what I've studied.

Hands-on

Things I run, build, and test myself — all within the limits of one unrooted phone.

APK reverse engineeringDecompiling and rebuilding Android apps with MT Manager
Smali / DEX-level editingReading and patching app behavior at the bytecode level
AndroguardStatic analysis of Android packages
Android security researchStrong grasp of Android's security model and common vulnerability classes — comfortable identifying flaws and understanding exploitation logic through hands-on device work
Payload & exploit testingHands-on building and testing of payloads and exploit chains, including zero-click concepts, in controlled phone-based setups
Attack attributionTracing a compromised system back to how and where an attack came from
Physical-access device testingSecurity testing of Android devices with physical access, using multiple tools
LinuxComfortable working in Linux environments and using command-line tools
OSINT tooling & reconBuilding and using lookup tools across usernames, domains, IPs, and more
Mobile-first workflowGetting real security work done without a laptop

Studied / Theory

Knowledge built through deep, self-directed research — not yet backed by hands-on lab work due to hardware limits.

Social engineeringStrong grasp of the human-side attack techniques and how they're defended against
iOS securityWorking knowledge of iOS's security architecture, including the concepts behind both zero-click and click-based exploit chains
Offensive security fundamentalsBroad reading across attack methodology and how systems get compromised
Defending against cyberattacksHow different attack types work and the practical steps to defend against each one
Account recovery knowledgeUnderstanding how to regain access to a locked or compromised account
Account protection knowledgeHardening accounts against takeover and unauthorized access
Online content removalGetting content you own taken down when it's been leaked or reposted elsewhere
Cyber awareness & teachingAble to explain security concepts simply, for hackers and non-technical people alike

General approach: given any system, my instinct is to study how it's built until I understand where it could fail — that's the pattern behind everything else on this list.

Beyond security: I research randomly — whatever topic catches my attention, I'll go deep on it for hours, no fixed field required. Security is the constant; everything else rotates.

// services

Things I can help with — all of it free, none of it paid.

★ Every service below is free of cost — not a paid service

Account recovery

Help getting back into a locked or compromised account of yours.

Teaching & awareness

Explaining hacking concepts and cyber awareness — plus other subjects I've studied, on request.

Account protection guidance

Practical steps to harden your accounts before something goes wrong.

Android / iOS security guidance

Tightening up your device's security settings on either platform.

If you've been hacked

Guidance on defending your accounts and recovering your data safely after a breach.

General Android guidance

Questions about Android, apps, or getting more out of your device — happy to help.

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