In this post, we will continue to explore driver exploitation, focusing on NULL pointer dereferences, and demonstrating how we can exploit this class of vulnerability on both Windows 7 x64 and Windows 10 x32.
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Following on from my earlier post in which we walked through creating an exploit for the WARBIRD vulnerability, over the next few posts I'm going to be looking at Windows kernel exploitation. If you haven't had chance to read it, I'd recommend that you pause and give it a quick glance as some of this walkthrough will rely on concepts introduced previously. This post will start off by laying the groundwork for future posts, and walking through a simple stack overflow
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This week I took a break from SYSTEM chasing to review some anti-debugging techniques. With quite a few Bug Bounty programs available relying on client-side applications, I thought I'd share one of the techniques used by numerous security products (and apparently game anti-cheat engines) to stop you from debugging core components, and just how we can go about bypassing this. Obviously it goes without saying, but the technique shown in this post is not a vulnerability, if an attacker has this le
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In this post I wanted to take a look at something which I touched on previously, and that is just how a Windows kernel based exploit achieves privilege escalation. Rather than take something like HackSys Extreme Vulnerable Windows Driver, I wanted to work on something a little bit different
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For many pentesters, Meterpreter's getsystem command has become the default method of gaining SYSTEM account privileges, but have you ever have wondered just how this works behind the scenes? In this post I will show the details of how this technique works, and explore a couple of methods which are not quite as popular, but may help evade detection on those tricky redteam engagements. Meterpreter's "getsystem" Most of you will have used the getsystem module in Meterpreter before. For those tha
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In this post we will be exploring another "roasting" method which involves exploiting a weak account configuration setting in Active Directory.. AS-REP Roasting.
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This year I attended Defcon for the second time. I live in the UK, so making it out to the US for this awesome conference is something that I look forward to throughout the year. As part of my day job I'm a penetration tester, and I actually found myself in Santa Clara the week before Defcon on an assessment. Due to some unique circumstances, I took what I think must be a record breaking detour back to Defcon. After checking out the local famous garages and technology spots, I was on a flight b
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As a continuation of our previous post, we wanted to discuss another technique that can help during an red team engagement where the intention is to usually stay under the radar when compromising high value accounts.
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Of the many advancements in red teaming over the last 12 months, the development of BloodHound has provided a monumental step forward and is quickly becoming an essential tool in the arsenal of an attacker.
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Recently I've been trying to make sure that my redteam knowledge is up to date, exploring many of the advancements in Active Directory Kerberos attacks... and there have been quite a few! I finally found some free time this week to roll up my sleeves and dig into the internals of some of these attacks, and hopefully document them for other people to learn. This post is the first in a series aimed at explaining what is happening under the hood when you execute your favourite Powerview or Mimikat
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