Ransomware-driven data exfiltration: techniques and implications

This report analyzes the growing role of data exfiltration in ransomware and extortion operations, documenting the shift to double‑extortion tactics, the types of high‑value data targeted, and the combination of custom, commodity, and legitimate tools used to collect and transfer stolen data; it also provides guidance on detection and mitigation through multi‑method monitoring and focusing on critical files and directories.