https://www.cloudshark.org/captures/76038eaa4a3b
https://github.com/ITI/ICS-Security-Tools/tree/master/pcaps
https://github.com/ITI/ICS-Security-Tools/tree/master/pcaps/ModbusTCP
https://github.com/ITI/ICS-Security-Tools/tree/master/pcaps/bro/modbus
https://www.youtube.com/playlist?list=PLjoUWqjR7qXhGruLWvAewVkJ05Nh8z4O8
Understanding SCADA's Modbus Protocol