The Everest ransomware group claimed it breached Nissan Motor Corporation and stole data, posting alleged proof on its dark web leak site. The actors shared six screenshots and a directory listing that appear to show internal file storage and records, including documents and data extracts in formats such as .csv, .txt, and .xls (with additional file types like .pgp referenced). The material shown includes references to dealership information, certification reports, and claims processing; one screenshot reportedly shows a spreadsheet with dealership names and locations. Everest issued Nissan a five-day ultimatum to respond, threatening to publish the allegedly stolen data if the company does not engage.
The screenshots do not visibly expose sensitive personal data, but the folder names and file types suggest access to operational systems and internal documentation that could enable further exploitation or data mining. Reporting also contextualized the claim against Nissan’s prior exposure to ransomware activity, including a 2025 claim by Qilin involving a Nissan-related entity, underscoring continued targeting of large automotive organizations by extortion-focused groups.

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Nissan Motor Co. said the reported breach claims were linked to a cyber incident at a third-party vendor rather than Nissan's internal environment. The company added that its internal systems and customer data were not affected.
AhnLab ASEC's weekly dark web roundup noted an Everest ransomware attack against a major Japanese automobile manufacturing and sales company, consistent with the Nissan claim. This reflected broader security-industry reporting of the incident in mid-January.
By the time media reports were published, Nissan had not issued a public response to Everest's allegations. Coverage on January 12 and January 13 repeated the same claimed breach and extortion deadline without confirming the intrusion independently.
Alongside its breach claim, Everest reportedly demanded that Nissan respond within five days or the group would publish the allegedly stolen data. The visible screenshots suggested access to dealership, reporting, and operational records, though no clear sensitive personal data was exposed in the images.
On its dark web leak site, the Everest ransomware group claimed it had breached Nissan Motor Corporation. The post included six screenshots and a directory listing purportedly showing Nissan-related internal files and folders.
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