Atmeltomo data breach: 580K accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2023-08-22
In April 2021, "Japan's largest e-mail friend search site" Atmeltomo suffered a data breach that was later sold on a popular hacking forum. The breach exposed 1.3M records with 580k unique email addresses along with usernames, IP addresses and unsalted MD5 password hashes. Exposed data: email addresses, ip addresses, passwords, usernames. The breach dates from Apr 16, 2021; Have I Been Pwned loaded it on Aug 22, 2023.
What to do
- If you had a Atmeltomo account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
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