Japanese beer giant Asahi revealed on Thursday that a massive cyber-attack in September has potentially leaked the personal information of more than 1.5 million customers.
The drinks company published a statement on its investigation into the ransomware attack, which had crippled its operations across its factories in Japan and forced employees to take orders by pen and paper.
Asahi said it found that personal details of people who had contacted its customer service centres were likely exposed and that those affected would be notified soon.
The firm added that it would delay the release of its full-year financial results to focus on dealing with the fallout of the attack.
Asahi did not state the attacker's identity or demands.Ransomware group Qilin – which has previously hacked other major firms – had claimed responsibility for the Asahi attack.
It said that although the system was quickly isolated, investigators found the attacker had already infiltrated the network, encrypted its data, and deployed ransomware – a virus that blocks access to files until a ransom is paid.
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