Everest Ransomware Claims Mailchimp as New Victim in Relatively Small Breach

Everest ransomware claims Mailchimp breach, leaks 943,000 lines of data. While limited in size, it adds to a spike in global ransomware activity this July.

The Everest ransomware group is claiming responsibility for breaching Mailchimp, the popular marketing platform used to create, send and manage email campaigns and newsletters.

The group made the announcement earlier today on its dark web leak site, claiming to have stolen a 767 MB database containing 943,536 lines of data. According to Everest, the leak includes “internal company documents” and “a huge variety of personal documents and information of clients.”

A look at the sample data published by Everest shows that the leaked dataset includes structured business information rather than sensitive internal Mailchimp data. The records appear to contain domain names, company emails, phone numbers, city and country details, GDPR region labels, social media links, and information about hosting providers.

Many entries also ...