North Korean hackers have stolen nearly three-quarters of all cryptocurrency taken by cybercriminals so far this year—not through a relentless campaign of attacks, but through two precisely executed heists targeting decentralized finance platforms in April, according to a new report from blockchain intelligence firm TRM Labs.

The two incidents—a $285 million breach of Drift Protocol on April 1 and a $292 million exploit of Kelp DAO on April 18—together account for 76% of all crypto hack losses tracked through April, despite representing just 3% of the total number of incidents recorded.

All told, TRM Labs estimates that North Korean-linked hackers have swiped over $6 billion from crypto protocols and projects since…