Qilin takes responsibility for Cornerstone Staffing Solutions hack

Major U.S. recruitment firm Cornerstone Staffing Solutions was claimed to have 300 GB of sensitive information stolen from its systems by the Qilin ransomware gang, Cybernews reports.

Nearly 1 million files were part of the stolen data trove, including resumes from 120,000 people and almost 24 million personal records, according to Qilin. Analysis of over a dozen sample files leaked by the group showed not only a list of resumes saved as PDFs but also databases containing names, phone numbers, email and street addresses, Social Security numbers, employee ID numbers, and branch locations from yet to be determined individuals.

Aside from having its employees' names, job titles, salary details, and signed confidentiality documents exposed, Cornerstone also had its internal banking ledgers, banking statements, invoices, per-location overhead costs, and 2024 sales budgets leaked. Over 500 attacks have already been claimed by Qilin over the past six months, making it the most prolific ransomware operation this year.