MyRecon OSINT
1win
On 2 November 2024, 1win was breached. 96,166,543 accounts were exposed, including dates of birth, email addresses, geographic locations. MyRecon rates it 81/100 — critical. That is roughly everyone in Germany.
What happened
In November 2024, the online betting platform 1win suffered a data breach that exposed 96M users. The exposed data included email and IP addresses, phone numbers, dates of birth, country and SHA-256 password hashes.
Breach description from Have I Been Pwned, used under a CC BY 4.0 licence. Data provided to HIBP by Leidhall.
Who was behind it
No party has been publicly confirmed as responsible, and this page will not name one. Most breaches are never formally attributed: data surfaces on a forum or inside a combined dump long after the intrusion, and the trail back to a specific actor is rarely made public. Where a group has claimed responsibility it is usually named in the account above — that claim is theirs, not a finding of ours.
What was exposed, and why it matters
- Dates of birthOne of the three things call centres ask to verify identity, and it never changes.
- Email addressesThe address becomes a confirmed, active target — expect more phishing, better aimed.
- Geographic locationsWhere the account was used, which narrows a person down further than most people expect.
- IP addressesApproximate location at the time of use, and a way to correlate accounts across services.
- PasswordsAnyone reusing this password elsewhere has those accounts exposed too — credential stuffing is automated and tries them all within days.
- Phone numbersEnables SIM-swap attacks against SMS two-factor codes, and puts the number on scam-call lists indefinitely.
What to do if you were in it
- Change this password anywhere you reused it, starting with your email account — that is the one that can reset all the others.
- Move two-factor authentication off SMS and onto an authenticator app, which a SIM swap cannot intercept.
- Expect better-aimed phishing. A message that already knows your name and where you have an account is the whole point of a breach like this.
Questions people ask about this breach
Was my email address in the 1win breach?
Enter it in the box at the top of this page. MyRecon checks it against this breach and every other one on record, and the address is never stored.
What data was leaked in the 1win breach?
dates of birth, email addresses, geographic locations, ip addresses, passwords, phone numbers. Each one is explained above, along with what it means for the person it belongs to.
When did it happen, and when did it become public?
The breach is dated 2 November 2024. It was published to Have I Been Pwned on 3 February 2025, a gap of 94 days during which the data was already out.
Is the 1win breach real?
Yes. Have I Been Pwned lists it as verified, meaning the data was checked against the source rather than taken on trust.
How many people were affected?
96,166,543 accounts. That is roughly everyone in Germany. That is accounts rather than people — one person often has several.
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Severity is scored by MyRecon from the number of accounts, the sensitivity of the specific fields exposed, and whether the breach is confirmed — not by a language model. The description above is quoted from Have I Been Pwned; the analysis around it is ours.