Under Armour: 150 Million Fitness App Accounts Breached

Under Armour Inc. said Thursday that data from 150 million MyFitnessPal diet and fitness app accounts were compromised in February, in one of the biggest hacks in history, sending shares of the athletic apparel maker down 3 percent in after-hours trade.

The stolen data include account user names, email addresses and scrambled passwords for the popular MyFitnessPal mobile app and website, Under Armour said in a statement. Social Security numbers, driver license numbers and payment card data were not compromised, it said.

It is the largest data breach this year and one of the top five to date, based on the number of records compromised, according to SecurityScorecard, a cybersecurity rating and remediation company.

Larger hacks include 3 billion Yahoo accounts compromised in a 2013 incident and credentials for more than 412 million users of adult websites run by California-based FriendFinder Networks Inc. in 2016, according to breach notification website LeakedSource.com.

Under Armour said it was working with data security firms and law enforcement, but it did not provide details of how the hackers got into its network or pulled out the data without getting caught.

While the breach did not include financial data, large troves of stolen email addresses can be valuable to cybercriminals.

Email addresses retrieved in a 2014 attack that compromised data on 83 million JPMorgan Chase customers were later used in schemes to boost stock prices, according to U.S. federal indictments in the case in 2015.

Under Armor said in an alert on its website that it would require MyFitnessPal users to change their passwords, and it urged users to do so immediately.

“We continue to monitor for suspicious activity and to coordinate with law enforcement authorities,” the company said, adding that it was bolstering systems that detect and prevent unauthorized access to user information.

Under Armour said it started notifying users of the breach Thursday, four days after it learned of the incident.

Under Armour bought MyFitnessPal in 2015 for $475 million.

It is part of the company’s connected fitness division, whose revenue last year accounted for 1.8 percent of Under Armour’s $5 billion in total sales. 



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