Steganography

Table of Contents

• Embedding data to a jpeg or bmp file with steghide
• Extracting data from a jpeg or bmp file with steghide
• Resources

Embedding data to a jpeg or bmp file with steghide

Steghide only support jpeg and bmp image files. However, we can embed whatever type of file.

echo "This is my secret message" > secret_message.txt

Now to embed this text file to our image file.

steghide embed -cf my_photo.jpeg -ef secret_message.txt

Extracting data from a jpeg or bmp file with steghide

With steghide:

steghide extract extract -sf my_photo.jpeg

With binwalk:

binwalk -D='.*' PurpleThing.jpeg

Which is the same command as:

binwalk --dd='.*' PurpleThing.jpeg

Or even binwalk -e

Resources

• https://fareedfauzi.gitbook.io/ctf-checklist-for-beginner/steganography
• https://medium.com/the-kickstarter/steganography-on-kali-using-steghide-7dfd3293f3fa