8 it gained access to administrator-level access to MGM Resorts' Okta identity servers and 'Azure tenant.' That intrusion led MGM Resorts to proactively deactivate parts of its network, the attackers claimed.Īlphv said it had demanded a ransom from MGM Resorts but that the company didn't respond. The Russian-speaking Alphv ransomware group, also known as BlackCat, quickly claimed credit for attacking MGM Resorts, saying it used a social engineering attack that took the group about 10 minutes to execute to trick a help desk employee, after which on Sept.

The company's stock closed at $37.88 on Thursday, down 12.5% since Sept. 11 that multiple hotel and casino systems were offline due to an unspecified 'cybersecurity issue' that began the prior day, leading it to proactively take some systems offline as it responded, backed by external cybersecurity experts. They said that multiple 'systems still aren't functioning properly,' it said, including systems for preparing work schedules, and that 'there is no way to take vacation of any kind.' On Thursday, the Las Vegas Review-Journal detailed reports from employees of MGM Resorts. The company also operates casino hotels in Maryland, Michigan, Mississippi, New Jersey, New York and Ohio, as well as China. The company's hotels in Las Vegas include the Aria, Bellagio, Excalibur, Luxor, Mandalay Bay, MGM Grand, Mirage and New York-New York. MGM Resorts is one of the world's biggest casino operators, running 31 casino hotels globally. 'We continue to work diligently to resolve our cybersecurity issue while addressing individual guest needs promptly.' 'Our slot machine ticket-in/ticket-out systems are back up and running, and our casino cashiers and slot guest service representatives are happy to help guests who may experience intermittent issues,' it said. The company confirmed that 'intermittent issues' remain, including with some slot machines, as well as being unable to accept online hotel bookings or to issue digital key cards, leading it to issue physical room keys instead. 'All of our hotels and casinos are operating normally,' the Las Vegas-based company said in a Wednesday statement apparently meant to calm investors who sent the company's stock falling since the attack (see: Big MGM Resorts Outage Traces to Ransomware, Researchers Say). See Also: Live Webinar | Generative AI: Myths, Realities and Practical Use Cases Even so, numerous systems remain offline as the company seeks to rebuild its IT infrastructure. MGM Resorts International is declaring a return to normalcy at its hotels and casinos following a midmonth hit by ransomware-wielding attackers. The MGM National Harbor Hotel and Casino in Oxon Hill, Maryland (Image: Shutterstock)

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