December 2, 2023

23andMe has confirmed that data from a subset of its users has been compromised. The company said its systems were not breached and that attackers gathered the data by guessing the login credentials of a group of users and then scraping more people’s information from a feature known as DNA Relatives. Users opt into sharing their information through DNA Relatives for others to see.

Threat actors posted the data sample on the platform BreachForums earlier this week, claiming that it contained 1 million data points exclusively about Ashkenazi Jews. There also seem to be hundreds of thousands of users of Chinese descent impacted by the leak.

Threat actor started selling what it claims are 23andMe profiles for between $1 and $10 per account, depending on the scale of the purchase. The data includes customers PII.

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It also emphasized in a statement that it does not see evidence that its systems have been breached. It also encouraged users to use strong, unique passwords and enable two-factor authentication to keep attackers from compromising their individual accounts using login credentials exposed in other data breaches.

The company has not been clear on whether it has validated the data the threat actor leaked, noting that its investigation is ongoing and that it currently has preliminary results.

The data posted by the actor claims to include “celebrities.” Entries for technologists Mark Zuckerberg, Elon Musk, and Sergey Brin are all visible in the sample data

The technique of using credentials exposed in other data breaches to infiltrate accounts where those logins have been reused is known as “credential stuffing” and is a widely used account compromise technique.

The complete details of why the data was stolen, how much more the attackers have, and whether it is actually focused entirely on Ashkenazim is still unclear.

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This incident really highlights the risks associated with DNA databases. The fact that accounts had reportedly opted into the ‘DNA Relatives’ feature is particularly concerning as it could potentially result in extremely sensitive information becoming public.

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