As the popularity of applying doubly fed induction generators (DFIGs) in wind and marine current turbine generators of sustainable energy production, the requirement to the deep survey on cyber attacks and mitigation techniques against them is undeniable. Cyber attacks as the resultant of internet of things (IoT) in cyber physical systems threaten control signals and measurement data in the control process of converters in power electronic strategy. In this regard, the active power reference and measurement data in addition with the rotor speed parameters are vulnerable to be manipulated by cyber attacks due to the existence of communications, internet connections and the other probable access for attackers to influence in the control process. In this paper, a novel nonlinear virtual inertia control (VIC) is suggested to effectively mitigate the destructive effects of the important cyber attacks including false data injection attack (FDIA), denial of service (DoS) and hijack attack (HjA), happening with the active power and rotor speed profiles of DFIGs in an AC microgrid (ACMG). Moreover, a detection approach is proposed for the cyber conditions in the rotor side converter (RSC) of DFIG. Various simulation results are obtained via MATLAB software to verify the new method, precisely.