Walmart has denied being hit by a ransomware attack by the Yanluowang gang after the hackers claimed to encrypt thousands of computers.

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Walmart has said that their “Information Security team is monitoring our systems 24/7,” and believes the claims to be inaccurate.

“We believe this claim is inaccurate and are not aware of a successful attack in this regard on our devices,” a Walmart spokesperson told BleepingComputer.

On Monday, the relatively new Yanluowang ransomware operation published an entry to their data leak site claiming that they breached the retailer and encrypted between 40,000 and 50,000 devices.

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