In the traditional paradigm of state policymaking, confrontation with regional and international rivals primarily occurred within tangible and territorial domains. However, the rapid advancement of cyber technologies and the proliferation of information networks have created a new arena for tactical, operational, and strategic conflicts. In the US-Iran conflict within the strategic West Asia region, the United States, by dominating cyber infrastructures and utilizing public diplomacy tools, has sought to limit the impact of Iran's regional policies and alter its computational system in economic, security, and cultural spheres. This research aims to answer the question: What are the cyber threats posed by the United States against Iran, and what are the countermeasures? The research methodology is analytical-explanatory with a qualitative content analysis approach, and data has been collected from library and internet sources. The theoretical framework of public diplomacy has been employed to explain the research topic. Findings indicate that US cyber threats are primarily focused on undermining internal convergence, cognitive warfare aimed at influencing the thoughts, emotions, and behaviors of societies, shattering the culture of resistance, fragmenting and weakening the resistance front structure, and dominating perceptions. In this regard, establishing a National Information Network, indigenizing communication tools, enhancing media literacy, clarifying and deepening norms and values, implementing balanced patterns against the rival's cognitive warfare, and avoiding conservatism in disseminating events can largely mitigate these threats against Iran.