One of the world's largest banks, the Industrial and Commercial Bank of China (ICBC), has been hit by a ransomware attack.

According to The Register, cyber group Hunters International has claimed responsibility, saying they have stolen over 5.2 million files from the bank's London branch.

Hunters International, a relatively new ransomware-as-a-service operation, has threatened to release the stolen data if ICBC does not meet their demands by today's deadline.

The leaked data reportedly amounts to 6.6 TB of sensitive information. At the time of writing, ICBC has not issued a public statement regarding the ransomware attack.