Hacking group begins leaking customer data in Dutch telecom Odido hack

February 26, 2026 9:35 AM EST

FILE PHOTO: Figurines with computers and smartphones are seen in front of the words "Cyber Attack" in this illustration taken, February 19, 2024. REUTERS/Dado Ruvic/Illustration/File Photo

AMSTERDAM, Feb 26 (Reuters) - ‌The criminal ​group ​behind a hack at Dutch telecom Odido, one of the largest carried out in ‌the Netherlands, has begun publishing customer information ⁠on the dark web, the company said on Thursday.

The theft ‌of personal data of ‌6 million customers from the firm, T-Mobile's former Dutch operations, included names, telephone numbers, e-mail addresses, ​bank account numbers, birth dates and passport numbers. Odido said it believes the claim of the ⁠group "ShinyHunters" that it carried out the hack.

"Odido came to the decision ​not to engage in negotiations with these criminals or submit to their attempts at ​blackmail," the company said in ‌a statement, saying it had taken advice from cybersecurity firms and the police.

National ⁠broadcaster NOS, which has communicated with the hacking group, reported on Thursday that it has threatened to publish ⁠a million lines worth of customer data per day unless ​the company pays an unspecified amount.

"Our advice to victims of ransomware is not to pay," Stan Duijf of the country's ‌national police, which is investigating the hack, said in a statement.

He said paying ‌the ransom could finance future attacks on new ⁠victims, and there was ‌no guarantee thieves would ​follow through on promises to delete sensitive data.

(Reporting by Toby Sterling; editing by Barbara ‌Lewis)



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