This module provides a fake Telnet service that is designed to capture authentication credentials. DONTs and WONTs are sent to the client for all option negotiations, except for ECHO at the time of the password prompt since the server controls that for a bit more realism.
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use auxiliary/server/capture/telnet
msf auxiliary(telnet) > show actions
...actions...
msf auxiliary(telnet) > set ACTION < action-name >
msf auxiliary(telnet) > show options
...show and set options...
msf auxiliary(telnet) > run
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security