GMO Internet Group received a ransom demand over the breach, presumably to prevent release of customer information, and has refused to pay, saying compliance would not guarantee the stolen data is deleted or unused. The company has submitted evidence, including communication records, to police cybercrime authorities and is seeking a criminal investigation. Over 26,000 servers may have been accessed, with attackers stealing credentials and executing damaging trades across more than 70 brokerages. GMO warned attackers may publish claimed customer information and called the attack malicious manipulation of ordinary citizens' financial assets. GMO has also asked government agencies for assistance, describing the incident as going beyond encryption and data theft.

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