MALL.cz data breach: 735K accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2017-09-04
In July 2017, the Czech Republic e-commerce site MALL.cz suffered a data breach after which 735k unique accounts including email addresses, names, phone numbers and passwords were later posted online. Whilst passwords were stored as hashes, a number of different algorithms of varying strength were used over time. All passwords included in the publicly distributed data were in plain text and were likely just those that had been successfully cracked (members with strong passwords don't appear to be included). According to MALL.cz, the breach only impacted accounts created before 2015. Exposed data: email addresses, names, passwords, phone numbers. The breach dates from Jul 27, 2017; Have I Been Pwned loaded it on Sep 4, 2017.
What to do
- If you had a MALL.cz 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
All live incidents on Threat Watch
