Networking Fundamentals
https://www.coursera.org/learn/computer-networking
https://unit42.paloaltonetworks.com/wireshark-workshop-videos/
https://www.youtube.com/watch?v=OU-A2EmVrKQ (Wireshark Tutorial for BEGINNERS // Where to start with Wireshark)
https://www.youtube.com/playlist?list=PLLKT__MCUeiyUKmYaakznsZeU4lZYwt_j (Networking for Ethical Hackers)
System Administration and Operating System Fundamentals
https://training.linuxfoundation.org/training/introduction-to-linux/
https://ubuntu.com/tutorials/command-line-for-beginners#1-overview
https://www.youtube.com/playlist?list=PLLKT__MCUeiwfK18Io6kvwrrhqQyQnV5W (Beginner Linux for Ethical Hackers)
https://www.youtube.com/watch?v=0OTYxOJAor4 (c3rb3ru5d3d53c - Malware Theory - DLLs)
https://www.youtube.com/watch?v=pnS5MlUgp4Q (c3rb3ru5d3d53c - Malware Theory - File Extensions vs. File Signatures)
InfoSec Fundamentals
https://www.sans.org/cyberaces/
https://app.cybrary.it/browse/course/introduction-to-it-and-cybersecurity
https://www.leveleffect.com/cybersecurity-foundations
Mindset
https://www.youtube.com/watch?v=bDJb8WOJYdA (Everyone in IT should be required to watch this imo)
https://cloud.withgoogle.com/cloudsecurity/podcast/ep75-how-we-scale-detection-and-response-at-google-automation-metrics-toil/
https://cloud.withgoogle.com/cloudsecurity/podcast/ep73-your-soc-is-dead-evolve-to-output-driven-detect-and-respond/
https://cloud.withgoogle.com/cloudsecurity/podcast/ep71-attacking-google-to-defend-google-how-google-does-red-team/
https://www.youtube.com/watch?v=wQ8HIjkEe9o
https://www.sans.org/podcasts/blueprint/mark-orlando-building-a-stronger-blue-team-29/
Learn MITRE ATT&CK
https://www.cybrary.it/course/mitre-attack-defender-mad-attack-fundamentals/
https://academy.attackiq.com/courses/foundations-of-operationalizing-mitre-attck
https://academy.attackiq.com/courses/application-of-attck-navigator
https://academy.attackiq.com/courses/uniting-threat-risk-management-nist-800-53-mitre-attack
https://www.cybrary.it/course/mitre-attack-defender-mad-attack-for-soc-assessments/
https://www.cybrary.it/course/mitre-attack-threat-hunting/
https://attack.mitre.org/resources/training/cti/
https://www.cybrary.it/course/mitre-attack-defender-mad-attack-for-cyber-threat-intelligence/
https://www.cybrary.it/course/mitre-attack-adversary-emulation/
Learn Endpoint Digital Forensics and Investigations
https://app.letsdefend.io/academy/toc/event_log_analysis/
https://www.youtube.com/watch?v=VYROU-ZwZX8&list=PLlv3b9B16ZadqDQH0lTRO4kqn2P1g9Mve
https://www.youtube.com/watch?v=1PAGcPJFwbE&list=PLlv3b9B16Zaf-uDlgouB0DMiPNYU_sJFN
https://www.youtube.com/watch?v=l4IphrAjzeY&list=PLlv3b9B16ZacikAtT8NDXpNbGqU8vU4CE
https://www.youtube.com/playlist?list=PLfouvuAjspTrbbbEuwlWSzFi-O9ERZYDZ (SANS DFIR - KAPE)
Learn Network Digital Forensics and Investigations
https://www.youtube.com/watch?v=jFJMt-y6ZvU (WIRESHARK for CYBERSECURITY w/ Chris Greer!)
https://www.malware-traffic-analysis.net/ (Please don't download malware on the network)
Learn E-mail Digital Forensics and Investigations:
https://www.thesslstore.com/blog/how-to-read-an-email-header/
https://www.blackhat.com/docs/webcast/03162017-what-is-that-email-really-telling-me.pdf
https://app.letsdefend.io/academy/toc/Phishing-Campaign-Analysis/
Learn Security Operations and Incident Response
https://app.letsdefend.io/academy/toc/soc-fundamentals/
https://app.letsdefend.io/academy/toc/Detection/
https://app.letsdefend.io/academy/toc/siem/
https://www.crowdstrike.com/cybersecurity-101/incident-response/
https://app.letsdefend.io/academy/toc/incident-response/
https://www.youtube.com/playlist?list=PLqz80p7f6dFso4lvXyImqiJLmfoVbCfrI (BHIS - The SOC Age- Or, A Young SOC Analysts Illustrated Primer | John Strand)
https://services.google.com/fh/files/misc/googlecloud_autonomicsecurityoperations_soc10x.pdf
https://www.mitre.org/sites/default/files/publications/11-strategies-of-a-world-class-cybersecurity-operations-center.pdf
Learn Cyber Threat Intelligence
https://app.letsdefend.io/academy/toc/cyber-threat-intelligence/
https://www.youtube.com/watch?v=qwA6MmbeGNo (Open-Source Intelligence (OSINT) in 5 Hours - Full Course - Learn OSINT!)
Fun Learnings, CTF, and "hackme" sites
https://www.holidayhackchallenge.com/
https://adversary.zone/
https://capturetheflag.withgoogle.com/
https://www.hackthebox.com/
https://alexnisnevich.github.io/untrusted/
https://www.redhat.com/en/command-line-heroes/bash/index.html
https://cmdchallenge.com/
https://explainshell.com/
Blogs to follow
https://thedfirreport.com/
https://www.crowdstrike.com/blog/category/from-the-front-lines/
https://www.crowdstrike.com/blog/category/threat-intel-research/
https://www.proofpoint.com/us/blog/threat-insight
Youtube channels to follow
https://www.youtube.com/c/sansinstitute
https://www.youtube.com/c/SANSCloudSecurity
https://www.youtube.com/c/SANSDigitalForensics
https://www.youtube.com/c/BlackHillsInformationSecurity
https://www.youtube.com/c/JohnHammond010
https://www.youtube.com/c/ChrisGreer
https://www.youtube.com/c/TheCyberMentor
Podcasts
https://cloud.withgoogle.com/cloudsecurity/podcast/
https://www.sans.org/podcasts/blueprint/
https://www.dcppodcast.com/
Project Opportunities
https://www.theforage.com/
https://seedsecuritylabs.org/