Under Armour ransomware breach: data of 72 million customers appears on the dark web | Malwarebytes

Under Armour experienced a ransomware attack in November 2025, with the Everest group claiming responsibility. The company reported potential data breaches, but mounting evidence suggests that a large customer dataset is circulating online. The leaked data includes personal information and purchase histories. A class action lawsuit has been filed alleging negligence in data protection.