Data breach

Genesis Market data breach

8,000,000 accounts · breached April 5, 2023

Have I Been Pwned treats this breach as sensitive: it does not reveal publicly whether a particular address is in it. Only the owner of an address can check, after verifying it.

What happened

In April 2023, the stolen identity marketplace Genesis Market was shut down by the FBI and a coalition of law enforcement agencies across the globe in "Operation Cookie Monster". The service traded in "browser fingerprints" which enabled criminals to impersonate victims and access their online services. As many of the impacted accounts did not include email addresses, "8M" is merely an approximation intended to indicate scale. Other personal data compromised by the service included names, addresses and credit card information, although not all individuals had each of these fields exposed.

Description by Have I Been Pwned

What data leaked

  • Browser user agent details
  • Credit card CVV
  • Credit cards
  • Dates of birth
  • Email addresses
  • Names
  • Passwords
  • Phone numbers
  • Physical addresses
  • Usernames

What to do if you had an account

  1. Change the password. Change your password on this service. If you used the same password anywhere else, change it there too: attackers try leaked email and password pairs on other sites automatically. A password manager makes one unique password per site practical.
  2. Turn on two-step sign-in. Enable two-factor authentication where the service offers it, preferably with an authenticator app or a passkey. A leaked password alone is then not enough to get in.
  3. Expect targeted phishing. Leaked contact details are used to write convincing fake messages that mention the breached company or your real name. Do not click links in unexpected emails or texts about this account; go to the site by typing its address.
  4. Watch for scam calls and SIM swaps. Be suspicious of calls and texts that claim to be from your bank or a courier. Ask your mobile operator for a port-out or SIM-change PIN if it offers one.
  5. Check your bank statements. Review recent card and account transactions and report anything you do not recognise. If full card numbers were exposed, ask your bank to replace the card.
  6. Guard against identity fraud. Identity documents and dates of birth cannot be changed like a password. Consider a credit freeze or fraud alert where your country offers one, and be wary of anyone who 'verifies' you using those details.

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