In other news, Dell brings Greek malware into view

A couple of decades ago, in another life, I wrote a little script which would capture keystrokes and then store that data within the 'white space' of an image file. It was pretty crude, but it was also twenty years ago and to be honest nobody was really looking for stuff which was effectively hidden in plain sight that way. That way being the use of something called steganography, from the Greek steganos which means covered and graphie which means writing; so literally covered writing. I used it to good effect during my period as an explorer of networks belonging to other people, most notably when sysadmins would stay at my apartment and login to their networks in order to do a bit of housekeeping and, unknown to them at the time, give me root. Things have moved on a lot since then, and steganography has become a much more complex tool being deployed by cybercriminals.