North Korea's relentless cyber campaign against South Korea has taken a new turn, with the Japanese police revealing that the $4.6B DMM Bitcoin hack in May was the work of a North Korean hacker group called 'Trader Traitor'. According to the Japanese National Police Agency (NPA) and the Tokyo Metropolitan Police Department, the group used phishing emails to trick employees of companies associated with DMM Bitcoin into infecting their systems with malware. This allowed the hackers to steal vast amounts of cryptocurrency from the exchange. The attack on DMM Bitcoin is just one of many cyberattacks that North Korea has launched against South Korean companies in recent years. In 2021, the group was linked to a $200 million hack of the South Korean cryptocurrency exchange Bithumb. These attacks highlight the growing threat posed by North Korean hackers. The group is highly skilled and well-resourced, and it has a history of targeting high-value targets. Companies and individuals should be on high alert for phishing emails and other suspicious activity that could be a sign of a North Korean cyberattack.