Android security tools have become essential for users, developers, and security researchers who want to know what is really happening inside their mobile OS environment. Duck Detector Refactoring is an open-source security tool designed to give you deep visibility into your device’s security health.
In this guide, you will learn everything about Duck Detector Refactoring. We will cover what the tool is, its main features, system requirements, how to download and install it, how to use it, credits to the developers, troubleshooting steps, and answers to frequently asked questions.
Table of Contents
What is Duck Detector Refactoring?
Duck Detector Refactoring is an open-source Android security inspection application built for local, on-device evidence collection. Unlike basic security apps that only check surface settings, Duck Detector inspects deep system signals to see if an Android system has been modified, rooted, hooked, or virtualized.
The app combines a modern Android Jetpack Compose user interface with low-level C++ and Assembly probes. This allows it to check system call behaviors, mount points, runtime hooks, KeyStore integrity, and virtualized execution environments directly on your device without relying on external servers.
Features of Duck Detector Refactoring
Duck Detector Refactoring comes packed with powerful detection capabilities designed to test device integrity. Here are its primary features:
- Comprehensive Security Coverage: Scans across multiple domains, including Bootloader status, Custom ROM detection, Dangerous Apps, Kernel integrity, LSPosed, Memory modifications, Mount point manipulation, Native Root, Play Integrity Fix, SELinux enforcement, SU binaries, System Properties, TEE/Attestation integrity, Virtualization, and Zygisk.
- Native Early Preload Probes: Uses low-level system calls (Syscall) and Assembly routines launched via a native activity to capture early boot traces and hidden mount anomalies before tools can hide them.
- Privacy-First Architecture: Performs scans completely offline on your device. It does not send your hardware signatures or security data to external third-party servers.
- Cross-Process Validation: Runs checks across multiple separate processes and isolated sandboxes. This multi-angle check reduces false positives and ensures high accuracy.
- Modern Jetpack Compose Interface: Displays scan results in clean, organized diagnostic cards with expandable rows so you can view technical evidence details easily.
Requirements
Before setting up or building Duck Detector Refactoring, make sure your hardware and software meet the necessary conditions.
For App Users (APK Usage)
- Android OS: Android 10 or higher (minimum SDK version 29).
- Processor Architecture: Works best on 64-bit ARM devices (arm64-v8a architecture) for low-level system call probes.
- Permissions: Does not require root privileges to perform its security checks.
For Developers (Building from Source Code)
- IDE: Android Studio (latest stable release recommended).
- Java Development Kit: JDK 17.
- Android SDK: Target and compile SDK version 37 with SDK Build Tools 37.0.0.
- Native NDK: Android NDK version 30.0.14904198 or compatible.
Download
Getting Duck Detector Refactoring is simple, depending on whether you want a ready-to-use application file or the source code:
- Pre-Compiled APK: Visit the releases section of the Duck Detector Refactoring repository on GitHub (maintained by developers like eltavine and rrr333nnn333) and download the latest compiled APK file directly to your device.
- Source Code Clone: Developers can clone the repository from GitHub using Git commands to audit, inspect, or modify the source code locally on their machines.
How to Install
Depending on how you obtained Duck Detector Refactoring, follow the installation steps below.
Method 1: Installing the Pre-Compiled APK
- Download the APK file onto your Android device.
- Open your device settings, navigate to Security or Privacy settings, and enable the option to allow installation from unknown sources for your browser or file manager.
- Open your File Manager, locate the downloaded APK file, and tap it.
- Confirm the prompt by tapping Install.
- Once installed, tap Open to launch the application.
Method 2: Building and Installing via Android Studio
- Launch Android Studio and select Open Project, then choose the cloned Duck-Detector-Refactoring folder.
- Wait for Gradle synchronization to finish downloading dependencies and configuring build scripts.
- Connect your Android 10+ test device via USB debugging or start an emulator.
- Click the Run button or execute the Gradle command ./gradlew assembleRelease to compile the app binary and install it onto your device.
How to Use
Using Duck Detector Refactoring is straightforward thanks to its automated scanning interface:
- Launch the App: Open Duck Detector from your app drawer. Upon opening, the app executes low-level native preloads to gather system state data.
- Review the Overview Dashboard: The main screen displays top summary findings, highlighting overall system integrity, root status, and hook detection statuses.
- Inspect Specific Security Modules: Scroll through the structured detection cards (such as SELinux, LSPosed, Zygisk, or Mount points).
- View Detailed Evidence: Tap on any specific card to expand it. This shows exact system paths, environment strings, system call responses, and detection details.
- Manual Online Refresh (Optional): If you want to perform online KeyStore and TEE credential revocation checks, go to the settings page inside the app and manually trigger an online update.
Credit
Duck Detector Refactoring is built upon open-source contributions from dedicated security developers:
- Original Creator: Developed by eltavine under the original Duck-Detector-Refactoring project.
- Fork Maintainer: Maintained and shared by developer rrr333nnn333 on GitHub.
- License: Distributed under the permissive Apache License 2.0, allowing community audit, modification, and educational distribution.
- Community Contributors: Supported by various security researchers and Android modification analysts who contribute detection rules, native probes, and system property checks.
Troubleshooting
If you encounter issues while running or installing Duck Detector Refactoring, check these troubleshooting tips:
- App Crashes on Launch: Ensure your device runs Android 10 (API level 29) or higher. Older Android versions are not supported.
- Certain Checks Display “Downgraded” Status: Some custom device manufacturers (OEMs) or heavy security sandboxes restrict access to low-level system call files. When this occurs, Duck Detector gracefully downgrades those specific checks without crashing.
- Root Not Detected on Modified Devices: If your device uses customized hide modules, some heuristic checks might be bypassed. No security scanner guarantees 100% detection accuracy under every scenario.
- Build Errors in Android Studio: Verify that JDK 17 and NDK version 30 are selected in your Project Structure settings. Missing NDK components will prevent native C++ probes from compiling.
FAQs
No. Duck Detector Refactoring is designed to run entirely without root access, making it suitable for both stock official firmware and customized environments.
No. The app prioritizes privacy and processes scans locally on your device by default. It only connects to the internet if you manually enable online TEE revocation updates in settings.
Standard root checkers only look for common binaries like SU or SuperSU. Duck Detector performs low-level checks for runtime hooks, mount point anomalies, custom ROM signatures, system call traps, and virtualization traces.
Yes, Duck Detector Refactoring is completely free and open-source under the Apache-2.0 license.
Conclusion
Duck Detector Refactoring is an excellent, transparent, and privacy-first tool for anyone who wants to audit their Android device’s security health. Whether you are a security enthusiast testing your device setup or a developer looking to understand modern detection mechanisms, this app provides clear evidence and structured diagnostic reporting.
Did you find this guide helpful? Have you tried scanning your device with Duck Detector Refactoring yet? Please leave a comment below and share your results or questions with us!
