Techblog and Security
With my researches, described on my other post Hunting for LPEs in Gaming Software. I was curious about GOG services which run as Local System. I installed GOG on a „fresh“ Windows 11 and Windows 10 system and focused again to the Service „GalaxCommunication“. As we can see the Service is still running with SYSTEM
Recently I started to dive deeper into the topic „LPE on Windows“, obviously one of the first things you will learn is to look what runs as system and does it load anything were you have write access to. The Theory I started my learning with some very educating sources about DLL Ghosting and Sideloading.
In my last post I described how to extract the firmware, this was quite easy. But to rebuild a firmware is something different. This is a three part long story RE: DC-932L Hacking a Webcam Part 1 – Getting a Shell RE: DC-932L Hacking a Webcam Part 2 – Extracting the Firmware RE: DC-932L Hacking
Continue Reading „RE: DC-932L Hacking a Webcam Part 3 – Building the Firmware „
In my last post I described how to get a shell on the device, but my final goal was to extract the firmware, manipulate some data in it and rebuild it so that I have a custom firmware for this device. This is a three part long story RE: DC-932L Hacking a Webcam Part 1
Continue Reading „RE: DC-932L Hacking a Webcam Part 2 – Extracting the Firmware“
Introduction and Story I remember, more then a year ago I watched this fantastic video from stacksmashing about reverse engineering and rebuilding a custom firmware for a webcam. I was absolutely stunned that this is possibile and thought about to try this some time on a device I have at home. As usual, time passes
Continue Reading „RE: DC-932L Hacking a Webcam Part 1 – Getting a Shell“
How to Start So, that´s a really good question and not easy to answer, it really depends on the goals and knowledge you have, but I`ll try to break this down. For a really first start I can recommend the following sources: HTB Academy Stack Based Buffer Overflows Cyber Mentors Buffer Overflow YT Series TryHackMe
Continue Reading „How to start with Buffer Overflows (Linux)“
Entry This Post is about different issues and challenging moments I encountered during my learning experience with Buffer Overflows and wished I knew before. This is not a guide how BOFs are working or how to learn this topic. Very imported, watch these two videos from LiveOverflow, these will really save you some time if
Continue Reading „Things I wanted to know before I started with Buffer Overflows“
Metabase GeoJSON API Endpoint Back in September 2021, Metabase released a security announcement regarding its GeoJSON API endpoint: GeoJSON URL validation can expose server files and environment variables to unauthorized users We’ve discovered a potential security issue with the custom GeoJSON map (admin->settings->maps->custom maps->add a map) support and potential local file inclusion (including environment variables).
A few weeks ago i just started with binary exploitation and as learning and understanding this topic is not enough challenging, i encountered different problems with the tools and some basics. One of these problems i will describe today. Intro there are many good tutorials, challanges and ctfs out there, where you can start learning
Continue Reading „pwntools, gdb, gdbserver and pwndbg with 32 bit binaries“
Doing one of the recent HTB Boxes i came across the tool https://nettools.net and learned how you can retrieve gMSA passwords with it: https://nettools.net/howto-retrieving-gmsa-password-details/ Additional to the howto from NetTools you can change the encoding for the desired attribute to only retrieve the current password this will print you only the current password as hex