This module is a very rough port of Julien Bedard's PoC. You need a valid login, but even anonymous can do it if it has permission to call NLST.
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use auxiliary/dos/windows/ftp/winftp230_nlst
msf auxiliary(winftp230_nlst) > show actions
...actions...
msf auxiliary(winftp230_nlst) > set ACTION < action-name >
msf auxiliary(winftp230_nlst) > show options
...show and set options...
msf auxiliary(winftp230_nlst) > 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