Best Detection of 2026 Series – Double-Extortion Mass File Exfiltration Preceding Ransomware Encryption
Detects the use of legitimate data-transfer utilities (rclone, MEGA client, restic, WinSCP) configured to exfiltrate data to cloud storage providers. This behavior is identified as a precursor to double-extortion ransomware attacks, where attackers steal sensitive data before encrypting it.
Sigma

