Oct 5 Reuters MGM Resorts International said on Thursday a cyberattack last month that disrupted its operations would cause a 100 million hit to its thirdquarter results, as it works to restore its systems.

One of the world39;s largest gambling firms, MGM shut down its systems after detecting the attack to contain damage, it said. It expects to also incur less than 10 million as a related onetime cost in the quarter ended on Sept. 30.

After the attack last month, customers posted social media images showing slot machines with error messages and queues at hotels in Las Vegas.

A hacking group named AlphV claimed it was involved in the breach. Sources earlier told Reuters AlphV worked with another outfit named Scattered Spider to break into MGM systems and steal data to hold for extortion.

MGM has declined to comment on whether it was asked for or paid any ransom.

The private data of customers who used MGM services before March 2019, including contact information, gender, date of birth and drivers license numbers, was breached, the company said.

We also believe a more limited number of Social Security numbers and passport numbers were obtained, it said.

We have no evidence that the criminal actors have used this data to commit identity theft or account fraud.

Hackers often hold stolen data for ransom and may also leak it to public forums or sell it to other cybercriminals.

The MGM data breach, which the FBI is investigating, is a vivid example of how large…