Everest Ransomware Group Allegedly Exposes 343 GB of Sensitive Data in Under Armour Breach

Cyberpress • November 18, 2025

The announcement, posted on the cybercriminal collective's dark web leak site on November 16, 2025, includes sample data purporting to validate the ...

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Everest Ransomware Group Breaches Under Armour, Exposing 343 GB of Data The Everest ransomware group has claimed responsibility for a significant data breach involving Under Armour, reportedly stealing 343 GB of sensitive internal data. The exposed data includes customer information, purchase history, and product details, potentially affecting millions of users worldwide. The group has displayed sample data on their dark web leak site and issued a seven-day ultimatum. 8 sources 62

Extracted Entities

Everest Ransomware Group Allegedly Exposes 343 GB of Sensitive Data in Under Armour Breach

The full story

Extracted Entities

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