Important Links to Know

Passive Recon

DNS Dumpster

Shodan

Threat Modeling

MITRE Engage Starter Kit

MITRE Engage Matrix Explorer

MITRE D3FEND

MITRE Attack Framework

Unified Kill Chain

Cyber Threat Intelligence

Mandiant

Recorded Future

AT&T Cybersecurity

Urlscan.io

Abuse.ch

Threat Fox

Cybersecurity Incident Tracker

Talos Intelligence

Robtex

LevelBlue Open Threat Exchange

Threat Miner

Additional Tools

CyberChef

ICANN Lookups

List of File Signatures

Zeek Training Lab

Indicators of Compromise

Valhalla

Virus Total

MISP Book

Spam and Email Analysis

Understanding an Email Header

Google Email Header Analysis

Message Header Analyzer

Mail Header Analysis

IP Info

PhishTool

SMTP Codes

Wireshark SMTP Display Filters

Wireshark Internet Mesage Format Display Filters

Phishing IR Playbook

MX TooolBox (Best Tool Ever)

Malware Sandboxes and Analysis

Any.Run

Hybrid Analysis

Joe Sandbox

Cuckoo’s Sandbox

CAPE Sandbox

Incident Response

Awesome Incident Response

Incident Response Plan Template

DFIR and Threat Hunting

LOLBAS

SANS Incident Handler’s Handbook

NIST 800-61 Computer Security Incident Handling Guide

Eric Zimmerman’s Tools

Traffic Analysis

Network Miner

Zeek Cheatsheets

Zeek Documentation

Endpoint Monitoring

Sysinternals Utilities

Sysinternals Live

Windows Logging Cheat Sheet

Swift on Security Sysmon Config

ION Storm Sysmon Config

OSQuery Schema Documentation

SOC and SIEM

Elastic SQL

Policy

NIST SP 800-53

Pen Test Fun

Vulnhub

CrackStation

Open Source Security Testing Methodology Manual

RedTeam Guide

MISC

13 Cubed Downloads (Just Awesome Sheets)

FRSecure Resources (Great Resource and their CISSP Course in the spring is great)

EthicsFirst