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(683)

7MS #98: Intro to PCI Scoping

7MS #98: Intro to PCI Scoping

So far I've focused on the technical aspects of PCI, but I'm trying to get familiar with the overall scoping questions that my tenacious QSA friends ask when they start a gap analysis. This episode shares some interesting tidbits I learned while doing some QSA "shadowing" on an assessment of a restaurant.

30 Syys 20158min

7MS #97: OFFTOPIC-Limbo

7MS #97: OFFTOPIC-Limbo

We're going off topic today and talking about video games! LIMBO for the Xbox!

25 Syys 20157min

7MS #96: How to Make Enemies During a Security Assessment

7MS #96: How to Make Enemies During a Security Assessment

Yep, we're talking about how to make ENEMIES during a security assessment today (and maybe turn them into friends).

23 Syys 20159min

7MS #95: How to Make Friends During a Security Assessment

7MS #95: How to Make Friends During a Security Assessment

When you start a security assessment with a company, not everybody's gonna be glad to see you. The IT dept and other employees may have tense shoulders, thinking that this is an Office Space situation where they're interviewing for their jobs. This episode talks about some ways you might be able to get your assessment off to a right start.

17 Syys 20157min

7MS #94: Learn How to Burp - Part 1

7MS #94: Learn How to Burp - Part 1

I've been looking for better ways to learn Burp Suite and I struck gold! Check out my recommendations in today's episode!

15 Syys 20158min

7MS #93: Securing Your Life

7MS #93: Securing Your Life

So yeah, this is kind of off-topic, but have you thought about security in the sense of "What kinds of security things should I be doing before I'm dead?" Today's episode explores that.

11 Syys 20158min

7MS #92: You're Not Ready for Big Boy Security Pants

7MS #92: You're Not Ready for Big Boy Security Pants

Sometimes I get in situations where clients want their WHOLE security program reviewed, but in reality, they are still in the baby steps phase. What's the right thing to do when, for lack of a better term, the client isn't ready to put on their security big boy points?

9 Syys 20157min

7MS #91: Umbrella

7MS #91: Umbrella

Today's episode is about Umbrella, a product from OpenDNS that provides a layer of protection against malware, wifi-jacking and other threats.

3 Syys 20157min

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