Introduction In this blog post, I will take you through the steps that I performed to get code execution on a Windows kiosk host using ONLY Microsoft Edge. Now, I know that there are many resources out there for breaking out of kiosks and that in general it can be quite easy, but this technique … Continue reading Breaking out of Windows Kiosks using only Microsoft Edge
Introduction During our engagements, red team operators often find themselves operating within complex Active Directory environments. The question then becomes finding the needle in the haystack that allows the red team to further escalate and/or reach their objectives. Luckily, the security community has already come up with ways to assist operators in answering these questions, … Continue reading Introducing pyCobaltHound – Let Cobalt Strike unleash the Hound
It's time for the season finale. In this post we explore several bypasses but also look at some mistakes made along the way. 1. From zero to hero: a quick recap As promised in part 8, I spent some time converting the application to disable Driver Signature Enforcement (DSE) into a Beacon Object File (BOF) … Continue reading Kernel Karnage – Part 9 (Finishing Touches)
When life gives you exploits, you turn them into Beacon Object Files. 1. Back to BOFs I never thought I would say this, but after spending so much time in kernel land, it’s almost as if developing kernel functionality is easier than writing user land applications, especially when they need to fly under the radar. … Continue reading Kernel Karnage – Part 8 (Getting Around DSE)
This week I emerge from the lab and put on a different hat. 1. Switching hats With Interceptor being successful in blinding $vendor2 sufficiently to run a meterpreter reverse shell, it is time to put on the red team hat and get out of the perfect lab environment. To do just that, I had to … Continue reading Kernel Karnage – Part 7 (Out of the Lab and Back to Reality)
With the release of this blogpost, we’re past the halfway point of my internship; time flies when you’re having fun. 1. Introduction - Status Report In the course of these 6 weeks, I’ve covered several aspects of kernel drivers and EDR/AVs kernel mechanisms. I started off strong by examining kernel callbacks and why EDR/AV products … Continue reading Kernel Karnage – Part 6 (Last Call)
After showing interceptor's options, it’s time to continue coding! On the menu are registry callbacks, doubly linked lists and a struggle with I/O in native C. 1. Interceptor 2.0 Until now, I relied on the Evil driver to patch kernel callbacks while I attempted to tackle $vendor2, however the Evil driver only implements patching for … Continue reading Kernel Karnage – Part 5 (I/O & Callbacks)
To make up for the long wait between parts 2 and 3, we're releasing another blog post this week. Part 4 is a bit smaller than the others, an intermezzo between parts 3 and 5 if you will, discussing interceptor. 1. RTFM & W(rite)TFM! The past few weeks I spent a lot of time getting … Continue reading Kernel Karnage – Part 4 (Inter(ceptor)mezzo)
While I was cruising along, taking in the views of the kernel landscape, I received a challenge … 1. Player 2 has entered the game The past weeks I mostly experimented with existing tooling and got acquainted with the basics of kernel driver development. I managed to get a quick win versus $vendor1 but that … Continue reading Kernel Karnage – Part 3 (Challenge Accepted)
I start the first week of my internship in true spooktober fashion as I dive into a daunting subject that’s been scaring me for some time now: The Windows Kernel. 1. KdPrint(“Hello, world!\n”); When I finished my previous internship, which was focused on bypassing Endpoint Detection and Response (EDR) software and Anti-Virus (AV) software from … Continue reading Kernel Karnage – Part 1
