GitHub Pages allows a custom 404.html . Some attackers craft a 404 handler that reads the requested path as a filename and serves any file from the repo’s _data folder. This allows dynamic payload delivery without changing the repository structure.
: IT departments struggle because blocking *.github.io might break legitimate educational tools. evasion github.io download anything
Then enable GitHub Pages on a public repo, upload payload.b64 (a base64'd executable), and run the script. GitHub Pages allows a custom 404
But when the download passes through trusted-attacker.github.io : upload payload.b64 (a base64'd executable)
