It seems you're looking for a download link for StegSpy, a tool historically used for detecting steganography (hidden data) in images and other files.
Because no legitimate source exists, any "StegSpy download link" you find on random forums, file-sharing sites (MediaFire, RapidShare, etc.), or YouTube videos is highly dangerous. Attackers commonly repackage old security tools with: stegspy download link
Several security researchers have uploaded the source code of StegSpy to GitHub for educational purposes. This is the safest option because you can read the code before compiling. It seems you're looking for a download link
: It is often included in legacy digital forensic suites or "all-in-one" steganography challenge projects on Tool Functionality file-sharing sites (MediaFire