Deloitte says “no systems have been impacted”, as Brain Cipher hacker group claims access to company’s 1TB data

Ransomware group Brain Cipher earlier claimed responsibility for a cyberattack on Deloitte UK. The hacker group also claimed stealing over 1 terabyte (1TB) of sensitive data. According to a report Cyber Security News, the group also submitted evidence of security protocol violation. It has also invited Deloitte representatives to engage in private discussions via corporate email, hinting at a possible ransom negotiation. However, Deloitte has denied that the allegations about the data breach affecting multiple clients of the company. A Deloitte spokesperson has also clarified that their investigation points to a single client’s system being impacted. Moreover, this affected system is not connected to the company’s main network, suggesting a more contained incident.