Ekoparty 2022 BFS Windows Challenge
In this blog post, we will solve the Windows userland challenge that Blue Frost Security published for Ekoparty 2022.
03Nov
24Sep
Windows Kernel Exploitation – Arbitrary Memory Mapping (x64)
In this post, we will develop an exploit for the HW driver. I picked this one because I looked for some real-life target to practice on and saw a post by Avast that mentioned vulnerabilities in an old version of this driver (Version 4.8.2 from 2015), that was used as...
09Sep
Browser Exploitation: Firefox OOB to RCE
In this post, we will exploit Midenios, a good introductory browser exploitation challenge that was originally used for the HackTheBox Business-CTF. I had some experience exploiting IE/Edge/Chrome before, but exploiting Firefox was mostly new to me.
14Jul
Windows Kernel Exploitation – HEVD x64 Use-After-Free
This part will look at a Use-After-Free vulnerability in HEVD on Windows 11 x64.
10Jul
Windows Kernel Exploitation – HEVD x64 Type Confusion
In the last post, we looked at a Stack Overflow in HEVD on Windows 11 x64, now are going to continue with a Type Confusion Vulnerability.
02Jul
Windows Kernel Exploitation – HEVD x64 Stack Overflow
After setting up our debugging environment, we will look at HEVD for a few posts before diving into real-world scenarios. HEVD is an awesome, intentionally vulnerable driver by HackSysTeam that allows exploiting a lot of different kernel vulnerability types. I think this one is great to get started because...
01Jul
Windows Kernel Exploitation – VM Setup
In this series about Windows kernel exploitation, we will explore various kernel exploit techniques & targets. This short first part will deal with the VM setup for the rest of the series.
14Jun
Bypassing DEP with VirtualProtect (x86)
In the last post we explored how to exploit the rainbow2.exe binary from the vulnbins repository using WriteProcessMemory & the "skeleton" method. Now we are going to explore how to use VirtualProtect and instead of setting up the arguments on the stack with dummy values and then replacing them, we...
12Jun
Bypassing DEP with WriteProcessMemory (x86)
In this post I will show an example on how to bypass DEP with WriteProcessMemory. This is a bit more complicated than doing it with VirtualProtect but nonetheless an interesting technical challenge. For the target binary I will use rainbow2.exe from my vulnbins repository.
16Jan
Lab – Rainbow Walkthrough
Rainbow is a medium difficulty machine that involves a SEH-based buffer overflow for user and a UAC bypass for root.