The hacker who broke the Ethereum.org forum allegedly sold the databases for the three most popular hard encryption wallets - Ledger, Trezor and KeepKey.
The three databases contain the name, address, phone number and email of more than 80.000 users in combination, however, they do not contain passwords for the accounts.
The hacker also recently reported the database SQL for online investment platform, BnkToTheFuture.
Ledger and Trezor databases were reportedly compromised
The hacker claims to have account details corresponding to about 41.500 Ledger users, over 27.100 Trezor users and 14.000 KeepKey customers.
The hacker is now advertising the databases of 18 virtual currency and forum exchanges, in addition to the e-mail lists of two crypto tax platforms.
The databases include the full SQL that extends to 4.500 users, three databases for the Mexcican Bitso trading platform and complete information account including access codes for platforms blockchain Blockcypher, Nimirum and Plutus.
The hacker clarified that he was only interested in premium offers, stating: "Do not offer me a few dollars, I am not interested."
Last week, BlockFi reported a data breach resulting from a Sim-swap attack. The full names, the address, leaked email, date of birth and customers' physical addresses. Customer capital was not affected.
In late April, Etana, a security company that provides services to Kraken, also suffered data breaches that did not involve losing customers' money.