According to Bitcoin.pl, customer data from failed Polish exchange Zondacrypto has been offered for sale on the darknet, with two packages available. The smaller package, containing email addresses and basic identification data, is priced at approximately 550 euros, while the larger set—including ID document scans, verification selfies, login histories, and wallet addresses—costs around 0.6 BTC.

The data breach comes as Zondacrypto halted withdrawals this month amid liquidity issues and depleted reserves. Security experts warn that the comprehensive dataset can be used by cybercriminals to commit identity fraud, open unauthorized bank accounts, or take out loans. Affected users are advised to change passwords and enable two-factor authentication.