MGM Resorts International suffered a ransomware attack in September 2023, significantly disrupting operations across its Las Vegas properties. The digital systems for managing casinos and hotels were incapacitated, preventing credit card transactions and forcing guests to seek alternative accommodations. Staff had to manually compute slot machine outcomes due to the systems' unavailability. Over 37 million customers and a trove of business information were affected, and hackers associated with the BlackCat/Alphv gang later claimed responsibility. The incident led to a substantial financial loss for the company, estimated at about $100 million, and triggered a sequence of class action lawsuits resulting in a $45 million settlement.
Source: https://therecord.media/trump-admin-ends-ftc-ransomware-case
"id": "mgm906031025",
"linkid": "mgm-resorts-international",
"type": "Ransomware",
"date": "3/2025",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization’s existence"