Breaking Down S3 Ransomware: Variants, Attack Paths and Trend Vision One™ Defenses

## Executive summary This Trend Research blog details how ransomware actors are shifting to cloud-native targets—especially AWS S3—and describes multiple practical attack variants (using SSE-KMS, SSE-C, imported KMS key material, XKS, and exfiltration + deletion), cites real incidents and PoCs (Codefinger, Bling Libra), and provides detections, policy examples, and defensive controls to mitigate irreversible data loss and extortion risk.