KRSID Ransomware Mass File Encryption (.krsid extension)

Arnold Chan@slaz

•updated Sep 20, 2026•0•0•1

This rule detects potential ransomware activity by monitoring for a high volume (more than 10) of file creation or renaming events within a short timeframe (30 minutes) initiated by a process named 'htspnew.exe'. It excludes common system and temporary directories to reduce noise, focusing on suspicious file modifications that might indicate bulk encryption or mass file manipulation.