Mass File Modification Activity Indicative of Ransomware Encryption

Duo Tech@duotech

•updated Jul 24, 2026•1•0•2

Bulk file-write activity by a single process within a 1-minute window, filtered to exclude common high-volume legitimate processes (backup agents, AV scanners, installers, sync clients) and correlated with the appearance of ransom-note-style filenames or unusual/new file extensions in the same window, indicative of ransomware encryption post-RAT access.