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(682)

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

7MS #63: I’m Excited to Go Phishing (audio)

7MS #63: I’m Excited to Go Phishing (audio)

This week I’ll be launching a phishing campaign against an organization that has been well trained to defend against such malicious attacks and links! Will this organization break my company’s 100% success rate for phishing, or will I be able to craft an email to fool at least one person? 7MS #63: I’m Excited to…

21 Touko 20157min

7MS #62: You Should Run LAPS (audio)

7MS #62: You Should Run LAPS (audio)

I’m excited about this! Microsoft has released a tool called Local Administrator Password Solution to help administrators manage local admin credentials for domain-joined machines. Check out this article for more information, and please contact me if you end up running this, as I’d love to hear about your experience. 7MS #62: You Should Run LAPS…

19 Touko 20157min

7MS #61: Why Local Admin Rights Suck (audio)

7MS #61: Why Local Admin Rights Suck (audio)

Users running as local admins on their machine are a big risk! This episode discusses some reasons why, and also here is the link to the Avecto study I mention regarding how many Microsoft vulnerabilities would be thwarted by removing admin rights. 7MS #61: Why Local Admin Rights Suck (audio)

14 Touko 20158min

7MS #60: How Not to Suck at Customer Service (audio)

7MS #60: How Not to Suck at Customer Service (audio)

This episode was inspired by two awesome customer service experiences I had in the past week. It got me thinking: how can we as infosec professionals suck less with our customer service approach? 7MS #60: How Not to Suck at Customer Service (audio)

12 Touko 20158min

7MS #59: Traveling with a Red Giant – Part 2 (audio)

7MS #59: Traveling with a Red Giant – Part 2 (audio)

A few episodes back I talked about Red Giant, a cool service that provides you with a pre-paid debit card that can be controlled/locked with your phone. I finally got my card working, and this episode’s about some cool things I learned about it. 7MS #59: Traveling with a Red Giant – Part 2 (audio)

7 Touko 20157min

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