You don’t need a program to do that, you can easily embed a BMP or an SVG without a complex executable needed to decode the image heck even for more complex file format a BASE64 decoder can do that.

Also if say CP is currently distributed through compressed archives even if they are PW protected it’s not like that 7zip then somehow becomes the illicit material. If you host the archive you are on the hook of distributing CP even if it’s encrypted…