Android Development Blog

Browser Malware

Apr 10, 2026 30 min read Security

How I Built a Firefox Extension Malware Scanner — And Used It to Expose a Malicious "YouTube Downloader"

Browser extensions sit at the most privileged layer of your web experience — they can read every page you visit, capture every keystroke, and silently exfiltrate your data. In this post, I walk through `extension-scanner.py`, an open-source static analysis tool I built to automatically detect malicious Firefox extensions. Then I put it to the test against a real-world extension that appeared in the wild masquerading as a harmless YouTube downloader — and the results are alarming.

browser-extension-security malware-analysis firefox-extension python cybersecurity reverse-engineering

Malware Analysis

Apr 9, 2026 45 min read Security

The Ad-Blocker That Steals Your Clicks: Inside "Supreme Adblocker for Youtube"

This extension genuinely blocks YouTube ads. It also hides a 25 KB JavaScript payload in a PNG image, connects to a command-and-control server in China, waits 72 hours before activating, and then silently fires fake affiliate clicks every time you visit Taobao or JD.com. This complete analysis walks through every encoding step, the full webpack module map, static detection signatures, and a YARA rule — so you can reproduce every finding yourself.

Browser extension malware click fraud affiliate fraud Steganography Firefox Extension Firefox Extension Malware

Cryptography & Steganography

Apr 2, 2026 45 min read Advanced

Browser extension malware analysis - using browser-xpi-malware-scanner.py to find malware in the wild

A Deep-dive and reverse engineering a malicious Firefox YouTube-to-MP4 extension which conceals a full C2 malware framework inside a PNG icon using steganography, Unicode obfuscation, a 72-hour sleeper, and live network rule injection.

malware-analysis browser-malware-analysis browser-xpi-malware-analysis firefox steganography png-stego

Cryptography & Steganography

Mar 30, 2026 30 min read Intermediate

LSB Steganography: Hiding Any Data in Images

Summarizes the core concept of LSB steganography, mentions specific technical details (0.4% color change, 777 KB capacity for Full HD images), covers both security applications and malware threats, and highlights detection methods.

Steganography information-security cybersecurity image-processing digital-forensics malware-analysis

Tutorial

Dec 28, 2025 25 min read Intermediate

Building EasyCrypt: A Secure File Encryption Tool with Nautilus and full GUI Integration - Complete Python Tutorial

Learn how to build EasyCrypt, a production-ready file encryption tool using Python, Fernet encryption, password-based key derivation, and GNOME desktop integration. This comprehensive tutorial covers cryptographic foundations, dual CLI/GUI interfaces, secure file deletion, Nautilus extensions, and security best practices with complete source code.

Python Encryption Cryptography Fernet Security LinuxDesktop

Kotlin

Dec 28, 2025 20 min read Advanced

Kotlin Flow: Mastering Asynchronous Data Streams - A Comprehensive Guide

Dive deep into Kotlin Flow and master asynchronous data streams. This comprehensive guide covers everything from basics to advanced patterns including cold vs hot flows, operators, StateFlow, SharedFlow, exception handling, and real-world use cases with practical examples.

Kotlin Flow Coroutines AsynchronousProgramming StateFlow SharedFlow

Kotlin

Dec 26, 2025 30 min read Advanced

Kotlin Coroutines and Structured Concurrency: A Complete Guide for Developers

Struggling with Kotlin coroutines? This complete guide covers everything from basics to advanced patterns including structured concurrency, exception handling, and real-world examples that will make you a coroutines expert.

kotlin coroutines structured-concurrency async-programming suspend-functions kotlin-flow

Android Development

Dec 25, 2025 15 min read Advanced

Say Goodbye to Backing Properties with Explicit Backing Fields

Discover how Kotlin 2.3.0's new explicit backing fields feature can eliminate the verbose backing property pattern, making your state management code cleaner and more maintainable. See real-world examples with StateFlow and collections.

Kotlin Kotlin2.3 AndroidDev StateFlow CleanCode

Android Development

Dec 25, 2025 5 min read Intermediate

Kotlin's New Silent Bug Killer: The Unused Return Value Checker

Kotlin 2.3.0 introduces the Unused Return Value Checker, a powerful new feature that catches silent bugs by warning you when function return values are ignored. Learn how to enable it and see real-world examples of bugs it can catch.

Kotlin Kotlin2.3 CodeQuality BugPrevention CleanCode

Tips & Tricks

Dec 19, 2025 10 min read

Extract Frames where motion was detected from MJPEG Streams with a simple bash script: A Complete Guide for Security Camera Analysis

Learn how to automatically detect and extract motion sequences from gigabyte-sized MJPEG security camera streams using a powerful bash script. Save hours of manual review and get straight to the footage that matters.

bash motion-detection security-cameras mjpeg ffmpeg automation

Android Development

Dec 19, 2025 15 min read Beginner

Gradle Auto-Increment Build Numbers on Release Build and custom output APK names in Android: A Complete Guide with Custom APK Naming

Tired of manually updating version codes every time you build your Android app? This tutorial shows you how to automatically increment build numbers, generate custom APK filenames like MyApp-v1.4-release-186.apk, and expose version info throughout your app using BuildConfig. Set it up once and never worry about version management again.

android-gradle version-management auto-increment gradle-kts buildconfig android-build

Web Development

Dec 6, 2025 5 min read

Building a Real-Time Markdown Blog Editor with Live Preview: A Full-Stack Tutorial

A full tutorial on how to write a markdown editor for a blog with a live preview side-by-side with the editor. The scrolling is synced with the editor, and there are buttons for stuff like: Bold text, Italic, Lists, Code, Links. There is even a button which uploads an image and includes it into the editor without reloading the page. This markdown editor is pretty advanced and easy to implement, and is perfect if you are familiar with the markdown language and want an editor for your blog or similar! Have a look!

Markdown Editor Live Preview Synchronized Scrolling Image Upload WebP PHP

Case Study

Dec 6, 2025 5 min read

How I Built This Website From Scratch - Full-Stack Portfolio

A deep dive into building yourdev.net from scratch: custom CMS with markdown editor, dynamic sitemap, privacy-first analytics, and security-hardened architecture. No frameworks, just pure PHP and vanilla JavaScript.

Web Development PHP Full-Stack Development Vanilla JavaScript Custom CMS Portfolio Website

Android Development

Dec 6, 2025 5 min read

EasyCCTV Introduction. Building a fully functioning multi-camera CCTV application utilizing other android devices as camera.

I noticed something missing in the vast field of applications on google play. I wanted to turn my old Android device into a camera. So I started building this app.

Android Kotlin camera2 compose

Android Development

Dec 3, 2025 15

Building Lists and Notes: A Modern Android App with Jetpack Compose and MVVM

After searching everywhere for a simple, ad-free notes app that actually worked the way I wanted, I decided to build my own. Here's the complete story of developing Lists and Notes - a feature-rich Android application built with Jetpack Compose, Room database, and proper MVVM architecture.

Android Development Jetpack Compose Kotlin MVVM Architecture Room Database Material Design 3

Android Development

Nov 20, 2025 12 min read

How to Hire an Android Developer in 2025: Complete Guide for Startups

Hiring the right Android developer can make or break your mobile app project. This comprehensive guide shows you exactly what to look for, questions to ask, and how much you should expect to pay.

hire android developer kotlin developer freelance startup guide

Android Development

Nov 20, 2025 8 min read

Kotlin vs Java for Android Development: Why I Chose Kotlin (And You Should Too)

The great debate: Kotlin vs Java. After years with C/C++, here's why I chose to master Kotlin for Android development and why it's the smarter career move.

kotlin java android development programming languages

Android Development

Nov 20, 2025 10 min read

Building EasyCCTV: Phase 1 - A simple camera streaming over HTTP

From concept to Play Store: A detailed breakdown of how I built EasyCCTV, an Android security camera app using modern tech stack including Kotlin and Camera2 API.

kotlin camera2 api jetpack compose case study easycctv