7 Minute Security3 Feb 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!

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(727)

7MS #727: Securing Your Mental Health – Part 7

Hello friends! It's been over a year since we did a dedicated mental health episode, so today I'm doing a big catch-up and running through my 7-point plan for being a more mentally secure me. None of ...

19 Juni 21min

7MS #726: Baby's First Hermes

Hello friends! I've been on a bit of an AI agent journey lately, and today I'm sharing my experience ditching OpenClaw and going all-in on Hermes — a self-hosted AI agent built by Nous Research. A Net...

12 Juni 22min

7MS #725: Building a Bulletproof Backup Solution

Hey friends! Backups are not as cool as pentesting, but boy do they matter when things go sideways. This week I'm sharing how a Proxmox backup disk space meltdown led me to a completely overhauled — a...

5 Juni 21min

7MS #724: Tales of Pentest Pwnage - Part 85

Hey friends! Today we're going deep on external network pentesting — something I realize we've barely touched in however many episodes we've done. I'm currently in a long stretch of back-to-back exter...

29 Maj 30min

7MS #723: CARTP - Cloud Red Team Tactics for Attacking and Defending Azure - Part 1

Hello friends! Today's a hybrid episode — some security content up top about a new certification I've kicked off, followed by an aggressively quick trip to Tangent Town. Feel free to bail after the se...

23 Maj 32min

7MS #722: I Turned My Phone Into a Brick

Hey friends! Quasi-vacation week over here, so today's episode is lighter and more personal: just a story about how I turned my phone into a "brick" (kind of) and what that's done for my mental health...

15 Maj 23min

7MS #721: Fun Professional and Personal AI Project Ideas – Part 2

Hello friends! Picking up the AI-automation series from a couple weeks back — here's another batch of scripts and integrations that have been giving me precious minutes (and sanity) back. Yes, I had t...

8 Maj 25min

7MS #720: Tales of Pentest Pwnage – Part 84

Hey friends! Today's another Tales of Pentest Pwnage! Quick tangent first on a couple side projects: I've got a music thing at quack.house (like the duck noise, not the drug) and a podcast with my dan...

1 Maj 43min