$750,000 BTC Theft Incident Occurs

A long-term holder of Bitcoin (BTC) transferred their BTC to a major exchange in Australia and had assets worth approximately $750,000 (around 1.06 billion KRW) stolen in less than 12 hours. The hacker appears to have compromised the victim's Google account and authentication information. According to acquaintances of the victim, the hacker had access to the victim's Google account for about three months, securing the Google Authenticator backup information stored in emails and the cloud, and waited until the victim deposited BTC into the exchange. The exchange recognized the withdrawal request as coming from the account owner and approved the withdrawal, with the victim receiving a withdrawal approval notification around 3 AM. This incident highlights that even a short period of transferring assets to an exchange can be a target for attacks. While the cloud backup of the Google Authenticator allows for convenient recovery of authentication codes across multiple devices, security can be weakened if the email account and backup information for the authentication app are tied to the same account system. The post recommended turning off the cloud backup for Google Authenticator and using hardware security keys like YubiKey.

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