In all our previous sections, we have assumed that the attacker and the target machine are in sync with time. This means that our server was up and listening all the time. Now, the question is: What happens if the attacker machine was offline for some reason or the connection did not happen properly? Well, our backdoor on the client side will crash and at the same time give a pop up as an error message and dump a text file indicating an exception error.
Currently, our Kali machine is not listening on any port. So, if the attacker initiates a TCP SYN to make a connection with us, now, since the port is closed, our Kali machine will reply with a TCP RST. Now, let's have a quick look at the packet level:
- Enable ...
