August 14, 2022 at 8:25 AM
https://app.hackthebox.com/challenges/222
Desc:Our infrastructure is under attack! The HMI interface went offline and we lost control of some critical PLCs in our ICS system. Moments after the attack started we managed to identify the target but did not have time to respond. The water storage facility's high/low sensors are corrupted thus setting the PLC into a halt state. We need to regain control and empty the water tank before it overflows. Our field operative has set a remote connection directly with the serial network of the system.
connecting with pymodbus.console
other commands giving:
also tried to connect and read some datas from python pyModbusTCP lib, same errors...
I couldn't find how can I send custom data via nc (nc not giving back any respond) with "52 XX AAAA BBBB" template (CRC caltulating by laptop2).
Desc:Our infrastructure is under attack! The HMI interface went offline and we lost control of some critical PLCs in our ICS system. Moments after the attack started we managed to identify the target but did not have time to respond. The water storage facility's high/low sensors are corrupted thus setting the PLC into a halt state. We need to regain control and empty the water tank before it overflows. Our field operative has set a remote connection directly with the serial network of the system.
connecting with pymodbus.console
> client.connect
true
other commands giving:
"original_function_code": "43 (0x2b)",
"error": "[Input/Output] Modbus Error: [Invalid Message] Incomplete message received, expected at least 8 bytes (0 received)"
also tried to connect and read some datas from python pyModbusTCP lib, same errors...
I couldn't find how can I send custom data via nc (nc not giving back any respond) with "52 XX AAAA BBBB" template (CRC caltulating by laptop2).