Company officials did not respond to emailed questions from The Associated Press. It also has mobile and online operations and sports betting. “They appear to be native English speakers under the umbrella of a Russia-based operation called ALPHV or BlackCat.”Ĭaesars is the largest casino owner in the world, with more than 65 million Caesars Rewards members and properties in 18 states and Canada under the Caesars, Harrah’s, Horseshoe and Eldorado brands. “Unofficially, we saw a group called Scattered Spider claimed responsibility,” Callow said. Mandalay Bay, Park MGM, and the Mirage return. The Times of Northwest Indiana reported Thursday that Horseshoe Casino in Hammond alerted federal regulators “that the personal information of a ‘significant number’ of Caesars Rewards loyalty club members was copied and stolen in a cyberattack.” Caesars is the parent company of Horseshoe.īrett Callow, threat analyst for the New Zealand-based cybersecurity firm Emsisoft, said it was not clear if a ransom was paid or who was responsible for the intrusion - and for the attack reported Monday by MGM Resorts. Operations at three resorts from MGM Resorts International on the Las Vegas Strip reopen for 24 hour a day operations starting on Wednesday, March 3.