KnownCircle data breach: 2.0M accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2018-11-17
In approximately April 2016, the "marketing automation for agents and professional service providers" company KnownCircle had a large volume of data obtained by an external party. The data belonging to the now defunct service appeared in JSON format and contained gigabytes of data related to the real estate and insurance sectors. The personal data in the breach appears to have primarily been used for marketing purposes, including logs of emails sent and tracking of gift cards. A small number of passwords for KnownCircle staff were also present and were stored as bcrypt hashes. Exposed data: email addresses, email messages, genders, names, passwords, phone numbers, physical addresses. The breach dates from Apr 12, 2016; Have I Been Pwned loaded it on Nov 17, 2018.
What to do
- If you had a KnownCircle 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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