HackingNotes/Steganography.org

Steganography

Introduction

Steganography is to hide data in images (or different types of files), can be hidden, for example:

• Source code.
• List of compromised servers, and devices.
• Plans for future attacks.
• And everything that you can think of.

Methods for hiding information

Least Significative Byte

The rightmost bist that makes up an image, is called the least significative byte (LSB), they can be modified without a change in the appearance of the image.

Masking

This technique modifies the image, it is mostly used with grayscale images, or noisy pictures like the sea, and the information will be store in those parts, actually modifying the image.

Algorithms and Transformations

This technique, hides the information in mathematical functions like compression algorithms.

Steganography Tools

Steghide

To hide something in a picture using steghide we need to run the following command:

steghide embed -ef [file_to_embed] -cf [container_file]

And to extract it we can run:

steghide extract -sf [stego_file]

Stegsnow

Snow adds tabs and spaces to a text file, to hide a message. It works like this:

stegsnow -C -m [message] -p [password] [input_file] [output_file]

And to extract the information we run the following command:

stegsnow -C -p [password] [file_with_information]