Data from 400 thousand individuals and 2.5 terabytes of data may have been stolen during a data breach on the cryptocurrency exchange Bitfinex, according to claims made by Shinoji Research.

Users will need to wait for the formal notification as the exchange has not yet verified the information.

The attack was attributed to the FSociety ransomware organisation, which is well-known for its malevolent actions, according to Shinoji Research. Two megalinks to their Onion website loaded on the page.

These links open a text file with a partial password dump and usernames in plaintext.

According to Shinoji Research, the analysis revealed that there were no known accounts on the list that belonged to trade companies like Alameda Research.

Still, the sheer size of the data indicates that hackers have been able to access every KYC document since Bitfinex's inception.

The hackers issued a warning stating that they would leak the KYC documents of all users if their demands were not met.

In a surprising development, a follower of Shinoji Research tried one of the passwords in the file and received a 2-factor authentication (2FA) warning.

This situation was later confirmed by Shinoji Research, confirming the reality of the violation. Bitfinex has not yet responded to these allegations

However, these are all claims by Shinoji Research and an official statement from Bitfinex should be awaited.