Cybersecurity, learned like a practitioner.
24 learning paths · 398 modules live · every lesson written by someone who has shipped the control or run the engagement. Free to start.
Latest modules
Most recent practitioner playbooks across every track. Filter by topic, level, or search in the sidebar.
Group Policy Preferences — The Gift That Keeps Giving
cPassword in SYSVOL still found in 2026. MS14-025 didn't remove legacy files. Plus SYSVOL credential hunting.
ADCS — ESC1 through ESC16
Active Directory Certificate Services attacks (Certified Pre-Owned). Template misconfigurations → domain compromise.
Trusts — Legacy Merger Paths
Trust types, SIDHistory attacks, cross-forest paths. Mergers leave trust relationships with security debt.
Layer 2/3 Trust — ARP, DNS, LLMNR Poisoning
Responder, mitm6, NTLM relay. Protocols designed in 1990 still farming credentials in 2026.
Why Firewalls Miss Modern C2
HTTPS C2, DNS tunneling, DoH, domain fronting, living-off-the-cloud — attackers use permitted traffic for everything.
Why Kerberos Keeps Producing Attacks
Kerberoasting, AS-REP, Golden Tickets, Silver Tickets, delegation abuse. Not bugs — design features in a new threat model.
SSH, RDP, SMB, WinRM — The Lateral Movement Highway
Every enterprise's admin protocols are attackers' rails. Credential reuse + cached credentials = fast compromise.
VPN Appliances — The Crown Jewel
Ivanti, Fortinet, Citrix, Palo Alto — every year a critical CVE. Patching speed vs attacker speed.
BGP, DNS, CAs — Internet-Scale Trust Failures
BGP hijack + DNS poisoning + TLS cert abuse = traffic interception at scale. Real breaches, real tools.
OT / ICS at the Network Layer
Stuxnet, Industroyer, Triton, Oldsmar. Why PLCs reachable from IT is catastrophic and common.
Practitioners who've
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Each lesson is authored by someone who has shipped the control or run the engagement in production.
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