Book Image

IoT Penetration Testing Cookbook

By : Aaron Guzman, Aditya Gupta
Book Image

IoT Penetration Testing Cookbook

By: Aaron Guzman, Aditya Gupta

Overview of this book

IoT is an upcoming trend in the IT industry today; there are a lot of IoT devices on the market, but there is a minimal understanding of how to safeguard them. If you are a security enthusiast or pentester, this book will help you understand how to exploit and secure IoT devices. This book follows a recipe-based approach, giving you practical experience in securing upcoming smart devices. It starts with practical recipes on how to analyze IoT device architectures and identify vulnerabilities. Then, it focuses on enhancing your pentesting skill set, teaching you how to exploit a vulnerable IoT device, along with identifying vulnerabilities in IoT device firmware. Next, this book teaches you how to secure embedded devices and exploit smart devices with hardware techniques. Moving forward, this book reveals advanced hardware pentesting techniques, along with software-defined, radio-based IoT pentesting with Zigbee and Z-Wave. Finally, this book also covers how to use new and unique pentesting techniques for different IoT devices, along with smart devices connected to the cloud. By the end of this book, you will have a fair understanding of how to use different pentesting techniques to exploit and secure various IoT devices.
Table of Contents (19 chapters)
Title Page
About the Authors
About the Reviewers
Customer Feedback

Backdooring firmware with firmware-mod-kit (FMK)

One of the techniques that often come in useful during exploitation is the ability to modify firmware. This can be done by extracting the filesystem from the firmware, modifying the contents, and then repackaging it into new firmware. This new firmware could then be flashed to the device.

Getting ready

In order to modify firmware, we will use a tool called FMK written by Jeremy Collake and Craig Heffner. FMK utilizes Binwalk and additional tools to extract the filesystem from the firmware and also provides us with the ability to repackage the modified filesystem into a new firmware binary.

FMK can be downloaded from or it might already be present in your system if you cloned the FAT tool earlier. Once you have downloaded it, we need firmware which we can try it out on. To keep things simple and so that everyone who is reading this book can replicate the following steps without investing in purchasing...