Initial Access Operations Part 1: The Windows Endpoint Defense Technology Landscape

This article surveys modern Windows endpoint defense techniques used by EDR/XDR—including ETW, kernel notification callbacks, ntdll API hooking, process tree analysis, memory page scanning, call stack tracing, hardware-enforced stack protection (CET/IBT), and vulnerable driver blocklisting—explaining how they hinder initial access and post-exploitation on desktops while noting evasion considerations and blocklist gaps; it also observes that improved endpoint security is pushing attackers toward other vectors such as cloud misconfigurations, collaboration tools, supply chains, and credential abuse.