Disclosed is a shock sensor for detecting an attack on a facility equipped with the shock sensor, comprising: a microprocessor; a micro electromechanical system in communication with the microprocessor, the micro electromechanical system being integrated with a shock sensing device adapted to sense a shock generated by the attack in any direction and a microchip adapted to receive and store at least one parameter from the microprocessor and to analyze a shock signal generated by the shock based on the at least one parameter; and an output device connected with the microprocessor and adapted to output information based on an analysis result of the shock signal. According to the invention, the shock sensor can detect reliably any attack and has a simple circuit arrangement.