During brute-forcing every time you need custom password list & username list. Username list is as well as important as password list, it should be unique for every organization.If we use traditional large number of username list , then it will be tedious process.Custom username list also useful in username enumeration.
Creating custom username list:-
(1)Jigsaw:-
During information gathering stage , you may use jigsaw script. It is great script for gathering employees `s details like fullname, position, department, email addresses.You should use script with your jigsaw credential.
some times email address`s initial can be username of employee.So you can get different username from output of jigsaw script.
(2)Username script:-
If you have full name of users then you can use username.py script to generate possible username by using different combination of first name & last name.
I also write bash script which generate possible username using first name, last name & birth date.