This thesis deals with the detection of multi-step attack and strategies to mitigate them within Digital Service Chains (DSCs), a framework increasingly adopted by Digital Service Providers (DSPs) to integrate various digital components like IoT, software and cloud infrastructure. While DSCs offer significant advantages in terms of scalability and flexibility, they also introduce security challenges, making difficult to isolate and mitigate threats. To address these challenges, this work proposed an innovative approach based on TAMELESS (Threat & Attack ModEL Smart System) framework. TAMELESS is designed to detect threats by determine if a system is secure through the study of its components and their security properties.