Rid_Enum is a RID cycling attack that attempts to enumerate user accounts through null sessions and the SID to RID enum. If you specify a password file, it will automatically attempt to guess the user accounts when its finished enumerating.
rid__enum <server_ip> <start_rid> <end_rid> <optional_password_file>
Before performing this , Create a file of your preference . And recommended to run in particular directory as its create files
cyborg@cyborg:~/Documents$ sudo rid__enum 192.168.1.7 500 50000 password.txt [*] Attempting lsaquery first...This will enumerate the base domain SID