Developers introduced the SmuggleMyPayload tool for testing file delivery

Developers presented SmuggleMyPayload — a specialized toolkit in Python, designed to automate the process of HTML smuggling, allowing to create obfuscated HTML pages that hide the payload inside the code and restore it on the client side using JavaScript. The tool supports several generation templates and various file delivery methods, with the key feature being the absence of external dependencies, simplifying deployment and use in isolated environments, and all functionality is implemented in native Python, eliminating the need to install additional libraries for the script to work. The set includes ready-made configurations for bypassing content filtering systems that analyze incoming traffic for executable files, and users can adjust obfuscation parameters to change the signatures of generated files and make them harder to detect by perimeter protection means. HTML smuggling technology is actively used in penetration testing to check the resilience of corporate systems to proxy server and mail gateway bypassing, and the use of such tools allows security specialists to model scenarios for delivering malicious software hidden inside legitimate HTML traffic, for subsequent analysis of the effectiveness of protective mechanisms.