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(695)

7MS #71: OFFTOPIC-Mad Max (audio)

7MS #71: OFFTOPIC-Mad Max (audio)

We’re going totally off topic today and doing a movie review of Mad Max! 7MS #71: OFFTOPIC-Mad Max (audio)

23 Kesä 20158min

7MS #70: Get the Most out of Your DNS! (audio)

7MS #70: Get the Most out of Your DNS! (audio)

I’m pumped to talk about an about an awesome, free little tool that made my Internet connection feel like new again. 7MS #70: Get the Most out of Your DNS! (audio)

18 Kesä 20157min

7MS #69: I’m Not Responsible for Your Information Insecurity (audio)

7MS #69: I’m Not Responsible for Your Information Insecurity (audio)

Are you too hard on yourself? Do you think the success of your client’s infosec program lives and dies with you? Listen to this episode. You might feel better. 7MS #69: I’m Not Responsible for Your Information Insecurity (audio)

16 Kesä 20158min

7MS #68: Is Training and Awareness Worth It or Worthless (audio)

7MS #68: Is Training and Awareness Worth It or Worthless (audio)

This episode is about something that got my undies in a bunch – I heard a security expert imply that training and awareness might be worthless! 7MS #68: Is Training and Awareness Worth It or Worthless (audio)

11 Kesä 20158min

7MS #67: Wifi Sniffing is Fun-Part 2 (audio)

7MS #67: Wifi Sniffing is Fun-Part 2 (audio)

This is a follow-up to episode #64, in which I did some fun wireless sniffing and tried to find sensitive data within it! In the episode I talk about the network “map” of my sniffing setup. It looks like this: Ethernet from client->upstream port of hub My laptop with Wireshark->Hub Wifi access point->Hub To find…

9 Kesä 20157min

7MS #66: I’m Excited to Go Phishing – Part 2 (audio)

7MS #66: I’m Excited to Go Phishing – Part 2 (audio)

This is a follow-up to episode #63, discussing the results of a fun phishing campaign I recently completed. 7MS #66: I’m Excited to Go Phishing – Part 2 (audio)

4 Kesä 20158min

7MS #65: OFFTOPIC-Still Alice (audio)

7MS #65: OFFTOPIC-Still Alice (audio)

Warning, this episode is off topic and has NOTHING to do with infosec! Nope! Instead, it’s a review of the movie Still Alice. Yep. That happened. 7MS #65: OFFTOPIC-Still Alice (audio)

3 Kesä 20157min

7MS #64: Wifi Sniffing is Fun-Part 1 (audio)

7MS #64: Wifi Sniffing is Fun-Part 1 (audio)

I got a fun project involving wireless sniffing, followed up by scraping through packets looking for credit card data! Here’s part 1, which talks about about software/hardware you might need to do this the right way. 7MS #64: Wifi Sniffing is Fun-Part 1 (audio)

28 Touko 20157min

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