In my previous post “Red Team Tactics: Utilizing Syscalls in C# - Prerequisite Knowledge”, we covered some basic prerequisite concepts that we needed to understand before we could utilize syscalls in C#. We touched on some in-depth topics like windows internals and of course syscalls. We also went over how the .NET Framework functions and how we can utilize unmanaged code in C# to execute our syscall assemblies.| Jack Hacks
Over the past year, the security community - specifically Red Team Operators and Blue Team Defenders - have seen a massive rise in both public and private utilization of System Calls in windows malware for post-exploitation activities, as well as for the bypassing of EDR or Endpoint Detection and Response.| Jack Hacks
A small proof of concept Windows shellcode injector using syscalls.| www.solomonsklash.io
Windows X86-64 System Call Table (XP/2003/Vista/7/8/10/11 and Server)| j00ru.vexillium.org
I first encountered the concept of using direct system calls to bypass user-land API hooking a little more than a year ago when I read a blog post by Cornelis De Pla (@Cn33liz). It is an exce…| Team Hydra