Modbus

Metasploit can be used to exploit SCADA systems, the following modules might prove useful:

• auxiliary/scanner/scada/modbusdetect

• auxiliary/scanner/scada/modbus_findunitid

• auxiliary/scanner/scada/modbusclient

• auxiliary/admin/scada/modicon_stux_transfer

Reference

https://www.hackers-arise.com/post/2018/10/22/metasploit-basics-part-16-metasploit-scada-hacking