Reverse Engineering: Frida for Beginners

A beginner’s introduction to reverse engineering Android and windows applications using the Frida toolkit

What you will learn

Listing process libraries

Reversing Android apps

Hooking Classes and Functions

Examining and modifying function parameters and return values

Reversing windows app

Hooking process functions

Memory scanning

Process injection

Hacking memory

Decompiling apps

Bypassing root detection

Intercepting http and https traffic

Bypassing basic security mechanism for android and windows apps

Enumerating libraries and imported functions

and more….


Frida is a dynamic instrumentation toolkit for developers, reverse-engineers, and security researchers. It allows you to inject your own scripts into black box processes. Hook any function, spy on crypto APIs or trace private application code, no source code needed. Edit, hit save, and instantly see the results. All without compilation steps or program restarts. It’s the swiss army knife for process injections for native apps and is a popular dynamic code instrumentation toolkit. It lets you inject snippets of JavaScript or your own library into native apps on Windows and Android.  It is the go-to tool you use for API tracing.

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At the end of this course you will be able to:

  1. learn how to reverse engineer and perform process injection into android and windows applications
  2. hook functions and modify its behaviour
  3. perform basic bypass of security restrictions on android and windows apps

Features of this course:

  1. Designed with beginners in mind.
  2. Simple android apps and windows crackme’s designed to learn process injection and function hooking
  3. Practical and hands-on
  4. Using free tools only

Suitable for:

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  • Reverse Engineering and Malware Analysis Students
  • Students planning on entering Malware Analysis and Reverse Engineering, or Penetration Testers as a Career Path
  • Security researchers


  • Windows PC
  • Basic Java/Javascript would be helpful but not mandatory
  • Preferably have an Android phone (non-rooted)

Enroll now and I will see you inside!




Intro to Frida
Intro to Frida Injection

Setting up lab and rooted android emulator

Installing LD-player emulator
Installing platform tools
Installing frida-server on the android emulator
Installing objection and frida tools on the pc
Testing objection and frida

Setting up lab for non-rooted android phone

Installing Android-studio build-tools
Installing the apktool
Patching the target apk file with the frida-gadget (frida-server)
Enabling developer-mode on the android phone
Installing the patched-apk file to the android phone and testing it

Decompiling apk files

Reverse engineering using the apktool
Installing dex2jar and jd-gui
Decompiling an apk file using dex2jar and jd-gui

Understanding the Frida CLI

Understanding the Frida CLI

Simple Frida hello-world script

Simple Frida hello-world script

Frida script to list classes

Frida script to list classes

Frida scripts to list methods and properties

Frida scripts to list methods and properties

Hooking functions and bypassing root detection

Intro to hooking functions
Decompiling apk to identify target function to hook
Hooking functions and modifying them

Dumping function parameters

Dumping function parameters

Re-using app functions in Frida scripts and decrypting passwords

Analyzing app functions and creating skeleton script
Implementing app functions in frida and decrypting password

Frida and Windows: listing modules

Listing windows modules (DLL libraries) using Frida

Hooking windows MessageBox function

Hooking windows MessageBox function

Modifying the windows MessageBox API

Modifying the windows MessageBox API

Listing windows process functions

Listing windows process functions

Hooking file reading functions

Hooking file reading functions

Memory scanning and hacking

Memory scanning and hacking

Supplementary lessons – Android ethical hacking

Additional lessons on android ethical hacking

Intercepting http traffic

Installing Burpsuite
Setting Burpsuite proxy for LDplayer emulator
Installing the Insecure Banking app

Intercepting HTTPs traffic

Installing burpsuite CA cert
Modifying network-security-config
Creating keystore signing and intercepting https

Local data storage vulnerabilities

Local data storage vulnerabilities

Exported application component vulnerabilities

Exported application component vulnerabilities

Insecure logging vulnerability

Insecure logging vulnerability

Bypassing root detection using objection

Bypassing root detection using objection
Running Frida scripts after objection root bypass

Resources for further study

Bonus Lecture

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