WMI exploiter doesn't work on machines behind NAT

[VakarisZ]

Describe the bug

WMI exploiter doesn't exploit machines behind NAT

To Reproduce

1. Try to exploit WMI machine on GCP from local machine
2. WMI exploiter throws an error

Expected behavior

WMI should exploit the machine behind NAT. This can be achieved in the following way:

1. Fork impacket repository
2. In file \impacket\dcerpc\v5\dcomrt.py:1266 change the code

if stringBinding is None:
    # Something wen't wrong, let's just report it
    raise Exception('Can\'t find a valid stringBinding to connect')

to

if stringBinding is None:
    stringBinding = 'ncacn_ip_tcp:%s%s' % (self.get_target(), bindingPort)

as outlined here

[cakekoa]

Moved to guardicode/wmi-exploiter#1