Sublist3r - Subdomain Enumeration
Basic search
sublist3r -d hackersploit.org
Selected search engines
sublist3r -d hackersploit.org -e google,yahoo
With bruteforce and threads
sublist3r -d google.com -b -t 10
sublist3r -d hackersploit.org
sublist3r -d hackersploit.org -e google,yahoo
sublist3r -d google.com -b -t 10