Data belonging to a 'substantial proportion' of Americans may have been stolen
The ransomware group claims FBI only obtained decryption keys for the last month and a half
Though no agency has released information about an operation
BlackCat threw toys out of pram after victim ignored ransom demand
Black Cat hackers claim that the data obtained from Barts Health NHS Trust represents the 'more bigger leak from the health care system in UK'
The BlackCat ransomware gang has created a clone of a victim's website and uploaded stolen data to it as a new strategy to coerce and embarrass victims into paying up.