OSINT

Passive Recon aka information gathering

ICANN Lookuplookup.icann.org

Internet Archive: Digital Library of Free & Borrowable Texts, Movies, Music & Wayback Machinearchive.org

http://shodan.ioshodan.io

DNSDumpster - Find & lookup dns records for recon & researchDNSDumpster.com

MITRE ATT&CK®attack.mitre.org

URL and website scanner - urlscan.iourlscan.io

OffSec’s Exploit Database Archivewww.exploit-db.com