This paper studies the probabilistic event-triggered \(H_{\infty }\) control problem for Markov jump cyber-physical systems subject to hybrid cyber-attacks. Both deception attacks and aperiodic denial-of-service (DoS) attacks are considered, with deception attacks occurring in the sensor-controller channel and aperiodic DoS attacks occurring in the controller-actuator channel. A probabilistic event-triggered mechanism with an uncertain triggering threshold is introduced to save communication resources, based on which an event-triggered mode-dependent state feedback controller is designed. In the absence of external disturbances, sufficient conditions are given to ensure the mean-square exponential stability of Markov jump cyber-physical systems by introducing multiple Lyapunov functions. Then, sufficient conditions are provided to achieve a prescribed level of \(H_{\infty }\) performance in the presence of external disturbances. By resolving a collection of linear matrix inequalities, the controller gains and event-triggering weight matrices are derived. Finally, an application-oriented example of the boost converter circuit system is given to show the validity of the proposed algorithm.