OSINT
The Internet knows pretty much everything, we just need to ask the right questions
OSINT Framework
Gives a ton of excellent resources on gathering intel.
Shodan & Censys
Websites which are constantly scanning the Internet for available devices, performs banner grabbing and publicly publishes its findings. Great to see what attackers on the Internet will see for an IP you own.
Tesseract
This is an OCR package which is a CLI tool that understands 100+ languages. Very useful to gather quick text from images!
Google Dorks
GHDB contains a ton of premade dorks to find info.
Certificate Transparency
CAs are required to publish all certificates issued to a public database. This can be useful to find servers that are internal to a LAN or are not Internet accessible.
Credential Leaks
Passive DNS
Occasionally there will be old or forgotten IPs for a site listed in passive DNS listings.
Data Aggregators
Hunter.io, compiles lists of org metadata, useful to identify email addressing schemes.
haveibeenpwned.com, lists of pwned email accounts.
dehashed.com, public data dumps available, requries paid access.
scylla.sh, indexed data dumps, free, currently down.
Public data dump forums
Torrents
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