IoT Penetration Testing Cookbook

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 https://github.com/brianpow/firmware-mod-kit/ 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 hardware, we will use firmware which can be emulated well using FAT.