2020 Chubb — Maze ransomware criminal claims during investigation of third-party data service
Data compromised
Corporate and insured-adjacent records claimed by criminals—confirmatory scope per company statements
Technical writeup
Chubb and outlets described investigation of a security incident involving potential unauthorized access to data held by a third-party service provider while Maze operators publicly claimed the insurer (framing disputed in early coverage).
Root cause
Ransomware/extortion operator claims plus third-party data service access path (per contemporaneous reporting)