North Korean hackers have stolen an estimated $3 billion in cryptocurrency over recent years, using the funds to support the country's nuclear weapons program. Sophisticated cybercriminal groups, including the notorious Lazarus Group, are responsible for these attacks, which target cryptocurrency exchanges and decentralized finance platforms. The stolen funds help circumvent international sanctions, enabling North Korea to fund weapons development despite economic restrictions. The United Nations and other international bodies have condemned these cyber activities, but the anonymous nature of cryptocurrency transactions makes tracking and recovering stolen assets challenging, further complicating global efforts to curb North Korea's nuclear ambitions.