useful tools

initial domain enumeration
view TXT records of a domain
dig $domain TXT
use fping to discover hosts attached to a domain
fping -asgq 172.16.5.0/24

use the second initial scan on the hosts gathered from fping

information gathering
enumerate users with kerbrute
kerbrute userenum /usr/share/wordlists/seclists/Usernames/Names/names.txt -d oscp.exam --dc dc01.oscp.exam -o valid_ad_users
enumerate users with a credentialed netexec query
netexec smb 172.16.5.5 -u htb-student -p Academy_student_AD! --users
enumerate the password policy with netexec
netexec smb $target -u avazquez -p Password123 --pass-pol
enumerate password policy with enum4linux
enum4linux -P $target