The targets of cybersecurity attacks are typically high-profile companies that face challenges getting back online, said Yoohwan Kim, a UNLV computer scientist who studies data privacy on blockchain and network security. Think hospitals, utility companies, even casino giants like MGM Resorts International.

MGM, with 28 properties worldwide, including many up and down the Las Vegas Strip, starting late Sunday experienced what resort officials labeled a “cyber issue.”

The nature of the issue was not detailed, but a statement from MGM said efforts to protect data included “shutting down certain systems.” The FBI is taking part in the investigation.

The shutdown prevented credit card transactions and crashed the BetMGM sports betting mobile app and company websites.