7MS #506: Tales of Pentest Pwnage - Part 32
7 Minute Security3 Helmi 2022

7MS #506: Tales of Pentest Pwnage - Part 32

Today's my favorite tale of pentest pwnage (again)! This time we're talking about sAMAccountName spoofing specifically. We also talk about my always-under-construction list of things I try early in a pentest for maximum pwnage:
  • Run PingCastle
  • Do the SharpHound/BloodHound dumps
  • Run the DHCP poisoning module of Responder
  • Check the ms-DS-MachineAccountQuota value in the domain - if its at the default (10), then any user can add machines to the domain.
Why is the ability to add machines to the domain important? Because in the case of the sAMAccountName spoofing, if you have a non-domain-joined machine like I do, you need the ability to add a computer object to the domain. Check the Pentestlab.blog article for more info, but essentially, if you have an unpatched domain controller and the ability to add computer objects to the domain, you can pull off the attack. The article goes into crazy good technical detail, and here's my not-so-technical explanation:

If I was on a pentest, and the DC was called 7MS-DC01, and I could join a machine to the domain (which as a reminder - ANY user can do if the machine quota value is at the default value of 10), I could rename that machine account to be 7MS-DC01 without the dollar sign, request a TGT for the domain controller's account, then restore the machine name back to what it was before. Now, because the TGT is stored in memory, we can use the S4U2self Kerberos extension to request a service ticket using a domain admin account. And because the original ticket belong to the 7MS-DC01 machine name which now doesn't exist, Kerberos will look for 7MS-DC01$ and will issue the ticket for the requested service.

I might've butchered that explanation mom, but I tried my best!

TLDL/TLDR: find and exploit these unpatched domain controllers with noPac. Enjoy!

Jaksot(688)

7MS #665: What I'm Working on This Week - Part 2

7MS #665: What I'm Working on This Week - Part 2

Hello there friends, I’m doing another “what I’m working on this week” episode which includes: BPATTY v1.6 release – big/cool/new content to share here PWPUSH – this looks to be an awesome way (both paid and free) to securely share files and passwords

7 Maalis 28min

7MS #664: What I’m Working on This Week

7MS #664: What I’m Working on This Week

In today’s episode I talk about what I’m working on this week, including: Playing with Sliver C2 and pairing it with ShellcodePack Talking about Netexecer, my upcoming tool that helps automate some of the early/boring stuff in an internal pentest A gotcha to watch out for if utilizing netexec’s MSSQL upload/download functionality

28 Helmi 25min

7MS #663: Pentesting GOAD SCCM

7MS #663: Pentesting GOAD SCCM

Today we live-hack an SCCM server via GOAD SCCM using some attack guidance from Misconfiguration Manager!  Attacks include: Unauthenticated PXE attack PXE (with password) attack Relaying the machine account of the MECM box over to the SQL server to get local admin

21 Helmi 29min

7MS #662: Pentesting Potatoes - Part 2

7MS #662: Pentesting Potatoes - Part 2

Hi friends, today we're talking about pentesting potatoes (not really, but this episode is sort of a homage to episode 333 where I went to Boise to do a controls assessment and ended up doing an impromptu physical pentest and social engineer exercise).  I talk about what a blast I'm having hunting APTs in XINTRA LABS, and two cool tools I'm building with the help of Cursor: A wrapper for Netexec that quickly finds roastable users, machines without SMB signing, clients running Webclient and more. A sifter of Snaffler-captured files to zero in even closer on interesting things such as usernames and passwords in clear text.

14 Helmi 37min

7MS #661: Baby’s First Hetzner and Ludus – Part 2

7MS #661: Baby’s First Hetzner and Ludus – Part 2

Today we continue our journey from last week where we spun up a Hetzner cloud server and Ludus.cloud SCCM pentesting range!  Topics include: Building a Proxmox Backup Server (this YouTube video was super helpful) Bridging a second WAN IP to the Hetzner/Ludus server Wrestling with the Hetzner (10-rule limit!) software firewall When attacking SCCM – you can get a version of pxethief that runs in Linux!

8 Helmi 37min

7MS #660: Baby's First Hetzner and Ludus

7MS #660: Baby's First Hetzner and Ludus

I had an absolute ball this week spinning up my first Hetzner server, though it was not without some drama (firewall config frustrations and failing hard drives).  Once I got past that, though, I got my first taste of the amazing world of Ludus.cloud, where I spun up a vulnerable Microsoft SCCM lab and have started to pwn it.  Can’t say enough good things about Ludus.cloud, but I certainly tried in this episode!

1 Helmi 34min

7MS #659: Eating the Security Dog Food - Part 8

7MS #659: Eating the Security Dog Food - Part 8

Today I’m excited about some tools/automation I’ve been working on to help shore up the 7MinSec security program, including: Using Retype as a document repository Leveraging the Nessus API to automate the downloading/correlating of scan data Monitoring markdown files for “last update” changes using a basic Python script

24 Tammi 28min

7MS #658: WPA3 Downgrade Attacks

7MS #658: WPA3 Downgrade Attacks

Hey friends, today we cover: The shiny new 7MinSec Club BPATTY updates A talk-through of the WPA3 downgrade attack, complemented by the YouTube livestream

17 Tammi 32min

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