A picture or photo in your PC can have different file extensions, such as jpeg, bmp, etc. These photos and pictures are a soft target for stenography programmers looking to infect a large database. It involves concealing data in different means, like in pictures, audio, or even concealed backdrop disturbance such as radio waves. You cannot receive or send viruses through images that include jpegs, .gifs, etc. but can you send or receive viruses through executable files like .exe, .scrg, etc. More information below.