“NetExec (a.k.a nxc) is a network service exploitation tool that helps automate assessing the security of large networks.” - https://www.netexec.wiki/. The following command will enumerate a list of SMB hosts with signing not enforced, allowing you to relay credentials to them using ntlmrelayx.py.
Command Reference:
SMB Hosts: smb_hosts.txt
nxc smb smb_host.txt --gen-relay-list output.txt