North Korea's Lazarus Pulls Off Biggest Crypto Heist in History

**Executive summary:** The report attributes a sophisticated theft of more than 400,000 ETH (about $1.5 billion) from Bybit's ETH cold wallet to the North Korean APT Lazarus, describing how attackers altered smart-contract and signing/UI logic during a routine transfer to divert funds, links on-chain to prior Lazarus-linked exchange thefts, and notes that Bybit is investigating the root cause with blockchain forensics while assuring other wallets remain secure.