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

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!

Avsnitt(683)

7MS #51: CEH vs. OSCP (audio)

7MS #51: CEH vs. OSCP (audio)

A few people have written in asking whether to pursue the CEH or OSCP (or both). This episode discusses my experience with each cert and hopefully points you in the right direction on which one might be right for you. Here’s the article on CEH I mention during the episode – it has much more…

7 Apr 20157min

7MS #50: OSCP – The Final Chapter – part 2! (audio)

7MS #50: OSCP – The Final Chapter – part 2! (audio)

At last, the epic conclusion of the maddening, redeeming OSCP journey. 7MS #50: OSCP – The Final Chapter – part 2! (audio)

2 Apr 20157min

7MS #49: OSCP – The Final Chapter – part 1! (audio)

7MS #49: OSCP – The Final Chapter – part 1! (audio)

We’ve arrived at the exciting two-part finale to my bloody battle with the OSCP! 7MS #49: OSCP – the final chapter – part 1! (audio)

31 Mars 20157min

7MS #48: So I Gave My Eight Year Old a Computer (audio)

7MS #48: So I Gave My Eight Year Old a Computer (audio)

Is it a good idea to give young kids a computer to play with? Maybe. Maybe not. Tune in to today’s episode and weigh in! 7MS #48: So I Gave My Eight Year Old a Computer (audio)

21 Mars 20158min

7MS #47: Logging and Alerting RELOADED (audio)

7MS #47: Logging and Alerting RELOADED (audio)

Hey, you should log the stuff going on in your network. This episode talks about that (again). And I reference some AD-related settings that may not be enabled in your environment…stuff you might want to turn on. Check out that information via this PDF here. 7MS #47: Logging and Alerting Reloaded (audio)

17 Mars 20157min

7MS #46: So You Want to be a Hacker? (audio)

7MS #46: So You Want to be a Hacker? (audio)

So you want to be a hacker? Cool. In this episode I toss myself under the bus and share why I used to have a really dumb perspective on what that meant, and how my view of hackers – and hacking – has changed (and hopefully matured). 7MS #46: So You Want to be a…

14 Mars 20157min

7MS #45: OFFTOPIC – Why I Stopped Pirating Software (audio)

7MS #45: OFFTOPIC – Why I Stopped Pirating Software (audio)

Warning, this is an off topic episode! I used to pirate software. There. I admitted it. But it’s funny how a letter from the Comcast legal dept. will change your mind and let you see piracy in a whole new light! 7MS #45: OFFTOPIC – Why I Stopped Pirating Software (audio)

10 Mars 20157min

7MS #44: OFFTOPIC – Annoying People at the YMCA (audio)

7MS #44: OFFTOPIC – Annoying People at the YMCA (audio)

Warning, this is an off topic episode! Did you know it’s fun to stay at the YMCA? Did you also know it’s fun to annoy annoying people at the YMCA? Listen to this episode to find out why. 7MS #44: OFFTOPIC – Annoying People at the YMCA (audio)

7 Mars 20157min

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