The FBI has linked a $308 million Bitcoin hack from DMM Bitcoin to a North Korean hacker group called Lazarus Group.The hack was carried out by posing as a recruiter on LinkedIn and tricking an employee at Ginco Inc., the company managing DMM Bitcoin's transactions.DMM Bitcoin has announced the shutdown of its operations and will transfer customer assets to SBI VC Trade.The stolen funds are believed to support North Korea's regime, and the hacker group is linked to a military intelligence agency.