Hacker leaks Telefónica data allegedly stolen in a new breach

A hacker is threatening to leak 106GB of data allegedly stolen from Telefónica in a breach the company denies. The hacker, part of the Hellcat Ransomware group, claims to have exfiltrated internal communications, purchase orders, logs, customer records, and employee data. While some of the leaked data appears to be from 2021, the hacker asserts the breach occurred in May 2023 and is leaking data as proof.