Quite a while ago I showed how to hide your files with steghide, a tool used to embed information into a jpeg image file. Today I will show you how to detect a file already “stegged” without prior knowledge and possible extract the information from the image file. For this demo, we will use a tool called Stegdetect, available here (notinh this link is for you ;).
Stegdetect is an automated tool for detecting steganographic content in images. It is capable of detecting several different steganographic methods to embed hidden information in JPEG images.