I'm seeing so much FUD and misinformation being spread about this that I wonder what's the motivation behind the stories reporting this. These are as close to the facts as I can state from what I've read about the situation:
- 23andMe was not hacked or breached.
- Another site (as of yet undisclosed) was breached and a database of usernames, passwords/hashes, last known login location, personal info, and recent IP addresses was accessed and downloaded by an attacker.
- The attacker took the database dump to the dark web and attempted to sell the leaked info.
- Another attacker purchased the data and began testing the logins on 23andMe using a botnet that used the username/passwords retrieved and used the last known location to use nodes that were close to those locations.
- All compromised accounts did not have MFA enabled.
- Data that was available to compromised accounts such as data sharing that was opted-into was available to the people that compromised them as well.
- No data that wasn't opted into was shared.
- 23andMe now requires MFA on all accounts (started once they were notified of a potential issue).
I agree with 23andMe. I don't see how it's their fault that users reused their passwords from other sites and didn't turn on Multi-Factor Authentication. In my opinion, they should have forced MFA for people but not doing so doesn't suddenly make them culpable for users' poor security practices.