Breach date: 2017-12-30. Added to this index: 2018-01-03. Accounts affected: about 46K. Domain: hounddawgs.org.
What happened
In December 2017, the Danish torrent tracker known as HoundDawgs suffered a data breach. More than 55GB of data was dumped publicly and whilst there was initially contention as to the severity of the incident, the data did indeed contain more than 45k unique email addresses complete extensive logs of torrenting activity, IP addresses and SHA1 passwords.
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
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.
IP addresses: The network addresses your devices used when you signed up, logged in or posted, recorded by almost every website in its access logs.
Passwords: The secret you use to sign in, stored by the breached service either in plain text, in a scrambled form called a hash, or encrypted. How it was stored decides how quickly it can be recovered.
Website activity: Records of your actions on a website or app, such as pages viewed, searches, clicks, downloads, logins, cart activity, IP addresses and timestamps.
What to do now
Check whether your own address is in this dataset with the free email breach check.
Change the password on this service and every other site where you used the same password.
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 HoundDawgs breach?
The HoundDawgs breach exposed Email addresses, IP addresses, Passwords, Website activity. About 46K accounts were affected.
Was I affected by the HoundDawgs 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 HoundDawgs breach?
Change the password on that account and everywhere you reused it, then turn on two-factor authentication. Passwords from this breach are traded and tried automatically against other sites.