This article investigates event-triggered control (ETC) of discrete-time Markov jump systems (MJSs) subject to hybrid cyber-attacks and unmeasured states. To reduce data transmission load, a mode-dependent event-triggered mechanism (ETM) has been developed. The unmeasured states are estimated using a Luenberger observer. Here deception attacks and DoS attacks are addressed. It is anticipated that input control signals sent across a network are vulnerable to cyber-attacks, in which adversaries could inject fake data into the control signals. So to secure the closed-loop system, sufficient conditions are derived. The solution of set matrix inequalities is used to build observer and controller gains. Finally, inverted pendulum applications are presented to illustrate the effectiveness and feasibility of the obtained theoretical results.