Attackers compromised a law firm, stealing a huge trove of data on A-List celebs. The media & entertainment law firm of Grubman Shire Meiselas & Sacks suffered a vicious cyber attack.  The 756GB in stolen files appears to contain data on dozens of high profile celebs, also including Mariah Carey, Cam Newton and John Oliver. The ransomware attack was perpetrated by a group called “REvil,” also …