GMO Internet confirmed that customer information was exfiltrated from Onamae.com Desktop Cloud, a virtual server service used by thousands of traders running MT4 and MT5. The group said 26,739 machines were potentially exposed but did not disclose how many servers were actually compromised, while an individual from Kanagawa reportedly lost about 4 million yen in two seconds. GMO Coin said no unauthorized transactions had been detected on its customer accounts and advised users to review balances and orders, secure their connections and remove unused API keys. After rejecting a ransom demand, GMO requested the use of active cyber defence, plans to reimburse losses and will pay 5,000 yen to every customer, whether affected or not.
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