Poor Key Management
Private key leak, hot wallet, Lazarus hacking group
Yapizon, a South Korean Bitcoin exchange, announced last week it lost 3831 Bitcoin (over $5.5 million) after an unknown hacker breached its system and stole funds from its server. According to reports, the unknown hackers were able to compromise the security of the platform during the early hours of April 22, 2017. The attack resulted in them successfully hijacking four separate Bitcoin wallets belonging to Yapizon. The incident seems to have left the exchange short of about 3,800 bitcoins, which was worth around $5 million at that time.
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