Brett Callow, a threat analyst for the anti-malware software company Emsisoft, said he believes the financial loss suffered by MGM Resorts International over nine days in September was the costliest ransomware attack in history.
MGM Resorts has resumed normal operations nationwide, more than a week after a hack disrupted many services.
A post from MGM properties stated that resort services, dining, entertainment, pools, and spas are operating normally, and gaming floors including slots and poker rooms are open.