The paper presents a sketch of a framework-based agile reengineering process, named PARFAIT, whose objective is to provide the users with evolved versions of legacy systems, as soon as possible. The overall static structure of the Rational Unified Process (RUP), originally developed for forward systems engineering, has been here adapted for reengineering and is used for PARFAIT documentation. Frameworks are used in the process aiming at an agile approach to support the reengineering. Frameworks allow applications to be rapidly created, more than if they are built from scratch. Agile characteristics, such as incremental approach, cooperative approach with users and customers, straightforwardness, etc. give PARFAIT the ability to support the rapid evolution of the legacy system to a new version, according to the users and customers needs. A summary of a case study and the results obtained in the reengineering are presented. This study refers to a concrete reengineering case of a real system for controlling entry and exit of electronic appliances in a repair shop.