Coinone says customer data exposed in hack of outsourced support contractor

South Korean crypto exchange Coinone said customer information was exposed after an external attacker breached servers at MetaM, an outsourced contractor handling customer support. In a notice posted today, Coinone said the attacker accessed and exfiltrated customer support data stored on MetaM’s servers at around 7:00 p.m. UTC on Nov. 11. The exchange became aware of the incident at 12:20 a.m. UTC on Nov. 12, according to the notice. The leaked information included data customers directly provided during support inquiries, such as names, email addresses, phone numbers, dates of birth, bank account numbers, passwords, resident registration numbers, ID issuance dates, home addresses, wallet addresses and transaction IDs (TXID).