Breach date: 2016-02-29. Added to this index: 2016-03-03. Accounts affected: about 1.5M. Domain: km.ru.
What happened
In February 2016, the Russian portal and email service KM.RU was the target of an attack which was consequently detailed on Reddit. Allegedly protesting "the foreign policy of Russia in regards to Ukraine", KM.RU was one of several Russian sites in the breach and impacted almost 1.5M accounts including sensitive personal information.
Breach data sourced from Have I Been Pwned, used under CC BY 4.0. Additional breach metadata provided by XposedOrNot. DataExposed is an independent service and is not affiliated with or endorsed by either.
What was exposed
Dates of birth: Your full birth date, day, month and year, collected at signup for age checks, identity verification, insurance quotes, birthday offers or government services.
Email addresses: The email address you used to register or log in. It is the most common field in breaches because it doubles as your username on most sites.
Genders: The gender or sex recorded on your profile, usually picked from a list at signup, sometimes with a title such as Mr or Ms or a gender identity option beyond male and female.
Geographic locations: A general location recorded on your account, such as a country, state, city, postcode or region, either typed in by you or estimated from your IP address.
Recovery email addresses: The secondary email address a service uses to send password reset links and security alerts if you lose access to your main account.
Security questions and answers: The questions and answers used to verify you during password resets or phone support, such as your first pet, first school, favourite teacher or mother's maiden name.
Usernames: The handle or login name you chose for an account, which may be public on forums, games and social platforms or used privately to sign in.
What to do now
Check whether your own address is in this dataset with the free email breach check.
Review the accounts connected to this service and turn on two-factor authentication.
Turn on two-factor authentication on your email account first, because it is the reset path for everything else.
Treat calls and messages that quote real details about you as hostile until you verify them another way.
Frequently asked questions
What data was leaked in the KM.RU breach?
The KM.RU breach exposed Dates of birth, Email addresses, Genders, Geographic locations, Recovery email addresses, Security questions and answers, Usernames. About 1.5M accounts were affected.
Was I affected by the KM.RU breach?
Run the free email breach check with the address you used on that service. It will tell you whether your address appears in this dataset.
What should I do about the KM.RU breach?
Treat any message that quotes details from this breach as suspicious, turn on two-factor authentication, and consider removing your details from people-search sites if your address or phone was included.