Dynamic Code Evaluation

Dynamic Code Evaluation is a critical subtechnique within the Payload Execution/Remote Code Execution Exploitation phase where attackers leverage functions that dynamically interpret and execute code at runtime. This approach involves exploiting application features that parse and execute strings as code, such as eval(), exec(), setTimeout(), Function(), or similar functions across various programming languages (PHP, JavaScript, Python, Ruby, etc.). Unlike traditional exploitation methods that target memory corruption, dynamic code evaluation takes advantage of legitimate application functionality to execute malicious payloads. Attackers typically inject malicious strings into parameters or variables that are subsequently passed to these evaluation functions, effectively bypassing static code analysis and traditional input validation mechanisms. This technique is particularly dangerous in web applications that process user inputs and subsequently evaluate them in a trusted context, providing attackers with direct code execution capabilities within the application's runtime environment.