Nation-state social engineering attacks are steadily being carried out as they are highly effective attacks, primarily to g ain an advantage over secret information, diplomatic negotiations or future policy changes. As The Ukraine-Russia war pr olongs, the activities of global hacking organizations are steadily increasing, and large-scale cyberattack attempts against major infrastructure or global companies continue, so a countermeasure strategy is needed. To this end, we determined tha t the social engineering attack cycle excluding physical contact among various social engineering models is the most suita ble model, and analyzed the preferred social engineering attack method by comparing it with geopolitical tactics through ca se analysis. AS a result China favors phishing attacks, which prefer quantity over quality, such as man-made tactics, Rus sia prefers covert and complex spear phishing reminiscent of espionage warfare, and North Korea uses geopolitical tactics such as spear phishing and watering holes for attacks on the US and South Korea Most of the other countries aimed to s ecure funds with ransomware. Accordingly, a Clean Pass policy for China, periodic compulsory education in Russia, and in ternational sanctions against North Korea were presented as countermeasure strategies.