[Analysis: North Korean Hacker Group Lazarus Group Likely Behind Upbit Hack] BlockBeats reports that on November 28, CryptoQuant CEO Ki Young Ju commented on the 'Upbit hack incident,' stating that the culprit is likely the North Korean hacker group Lazarus Group. Upbit mentioned in its announcement that a security vulnerability was discovered that could lead to private keys being inferred. 'If true, I doubt anyone other than North Korean hackers could achieve this.'