uatrickery is a package that implements a HTTP server that serves valid image data for some user agents, and arbitrary HTML/JS for others. This can be used as an attack on some social networks that have image thumbnailing bots with predictable user agents.
uatrickery takes a few critical flags. -targets should be a path to a newline separtaed file which defines user agents to serve the valid image for. -image should be the path to the image to serve. -payload should be the path to the HTML/JS/CSS to serve non-matching useragents. You can change the bind address of the server using -bind.
The MIT License (MIT)