Altenen data breach

From Breaches, in the HARD wiki · Updated
This article is about the June 2022 breach of Altenen. For every breach, see Breaches.

The Altenen data breach exposed 1,267,701 accounts from altenens.is in June 2022. The data taken includes passwords, usernames, cryptocurrency wallet addresses and email addresses.[1]

Have I Been Pwned verified it and added it to its search on 5 Nov 2024, 2 years later. It is the 384th largest of the 618 breaches in HARD’s list.

What was exposed

Altenen’s breach included 4 kinds of data. What each lets criminals do:

DataWhat it’s used for
PasswordsCriminals try leaked passwords on email, banking and shopping sites, because people reuse them.
UsernamesHalf of a login. With a reused password, it opens other accounts.
Cryptocurrency wallet addressesMarks you as holding crypto, which draws targeted scams.
Email addressesExpect scam emails that name the company to look genuine.

What to do

  1. Check whether you’re in it.Search your email address on Have I Been Pwned. It tells you which breaches it appears in, Altenen among them, without showing the data.
  2. Change your Altenen password.If the account still exists, sign in at Altenen (altenens.is) and change it.
  3. Change it anywhere you used the same one.Start with your email, then banking and shopping. Leaked passwords are tried on other sites automatically, within days.
  4. Use a password manager and two-step sign-in.A different password for every site means one breach can’t open the rest. Two-step sign-in stops a leaked password working on its own.
  5. Distrust messages that mention Altenen.Scammers use breach data to sound genuine. Don’t click links in emails or texts about the breach; go to the site yourself.

Timeline

  • : the breach, as best it can be dated.
  • : Have I Been Pwned verifies the data and adds it to its search, 2 years later.

Breaches often stay hidden for a long time. Until it came out, people in it had no reason to change anything.

Similar breaches

Breaches that leaked the same kinds of data, closest in time:

See Breaches for all 618, and Updates for keeping your devices patched.

References

  1. ^ Troy Hunt. “Altenen”, Have I Been Pwned, added 5 Nov 2024. Breach data licensed CC BY 4.0.