This study examines the cyber warfare strategies employed during the 2021-2022 conflict between Russia and Ukraine, focusing on how technological developments in information and communication have influenced this aspect of modern warfare. The conflict escalated as Russia viewed Ukraine's desire to join NATO as a significant threat, leading to a mix of military and non-military strategies, including extensive cyber attacks. Using a descriptive qualitative method, this research analyzes the cyber warfare strategies through the lens of state security, national interest, and cyber security theories. The findings highlight that both Russia and Ukraine utilized Distributed Denial of Service (DDoS) attacks and hacker groups to damage and disable governmental systems, aiming to disrupt communication and weaken the opponent with minimal costs. Russia's advanced cyber capabilities made Ukraine a vulnerable target, resulting in widespread cyber assaults impacting both civilian and governmental infrastructures. The study concludes that cyber warfare has emerged as a pivotal strategy in modern conflicts, with effects comparable to traditional military tactics. The Russia-Ukraine conflict underscores how cyber strategies can be used to achieve national interests and demonstrates the growing importance of cyber security in contemporary warfare. This conflict also serves as a warning to other nations regarding the vulnerabilities in their cyber defenses.