Incident Response: Ransomware Detection and Containment
Overview This post outlines a rapid incident response flow for suspected ransomware activity in Windows and Linux environments. Detection Monitor for unusual file I/O spikes Alert on renamed files with random extensions Identify process anomalies (PowerShell/WMIC in unusual context) Containment Disconnect infected hosts from network Isolate remote share mounts Preserve memory/images for forensic analysis Remediation Restore from verified backups Rotate credentials for compromised accounts Harden EDR/AV rules and patch related CVEs Lessons Early detection prevents full domain compromise Playbooks + automation are critical for scale Keep tabletop exercises current with latest threat patterns