Book Image

Kali Linux CTF Blueprints

By : Cameron Buchanan
Book Image

Kali Linux CTF Blueprints

By: Cameron Buchanan

Overview of this book

Table of Contents (14 chapters)
Kali Linux CTF Blueprints
About the Author
About the Reviewers

Scenario 4 – I am a Stegosaurus

Steganography is the practice of hiding information. It can be performed through a variety of means. The historic method that gets quoted a lot comes from the Roman Empire. Commanders would tattoo the heads of soldiers sent to escort diplomats with secret messages to be relayed at the other end. As the journeys were long and would take several months, the hair would grow back, hiding the message. I can only assume that until their hair reached a respectable length, they just wore hats or something.

This scenario isn't really a scenario. It's more of a set of ways to hide information in pictures and audio that can be used in other scenarios, notably in the rabbit trail. We are going to cover the use of some tools and a few other tips.

Visual steganography

There are a few easy ways to hide content in images, the simplest and most obvious of which is to edit the Exif data. The Exif data is extra information that sits within a file detailing various things, for example...