Steganography, of course, embeds messages in images, generally. But there are examples of people embedding executable code. Here's a perl script:
On Mar 17, 2014, at 3:13 PM, Andreas Broeckmann <[log in to unmask]> wrote:
> I'm not sure how relevant the question is, but are there instances of *images* performing as software code?
> there are QR-codes, but they are encodings/encryptions of text files which are then treated as data to be processed by software.