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 #26: The Importance of Training and Awareness (audio)

7MS #26: The Importance of Training and Awareness (audio)

Training and awareness – specifically as it relates to infosec – is something companies can’t spend enough $ on. But from my experience, not enough of them are making this a front-burner priority. This episode talks about one topic I’m particularly passionate about. I call it “How not to click on bad stuff.” Download: 7MS #26:…

13 Syys 20147min

7MS #25: Writing Better Pentest Reports (audio)

7MS #25: Writing Better Pentest Reports (audio)

This episode talks about some pointers, tools and tips towards writing better pentest reports. Download: 7MS #25: Writing Better Pentest Reports (audio)

23 Elo 20148min

7MS #24: Why Wireless Scares Me (audio)

7MS #24: Why Wireless Scares Me (audio)

This episode is all about why you should (probably not) use wireless hotspots, and keeping yourself safe in general when surfing the Web. Download: 7MS #24: Why Wireless Scares Me (audio)

16 Elo 20147min

7MS #23: OSCP – part 2 (audio)

7MS #23: OSCP – part 2 (audio)

In this episode I talk more about my adventures with OSCP and Offensive Security! . Download: 7MS #23: OSCP – part 2 (audio) Show notes: I recommend documenting ALL the exercises in the PDF. My understanding is that extra effort could be rewarded if you don’t do so hot on your final exam. Buffer overflows make…

9 Elo 20147min

7MS #22: Phishing with Black Squirrel (audio)

7MS #22: Phishing with Black Squirrel (audio)

In this episode I talk about using Black Squirrel to launch phishing campaigns! Download: 7MS #22: Phishing with Black Squirrel (audio) Show notes: Security Weekly is an excellent podcast/resource. Devour it regularly. Black Squirrel is the main tool discussed in this podcast. I’ve been using it for phishing campaigns and it’s been excellent in that capacity.

27 Heinä 20147min

7MS #21: OSCP – part 1 (audio)

7MS #21: OSCP – part 1 (audio)

In this episode I talk about my venture into Offensive Security! . Download: 7MS #21: OSCP – part 1 (audio) Show notes: It’s official – I have a death wish and have started the OSCP training. This episode is the first of what I hope will be a multi-part, spoiler-free series about my experience with OSCP. With…

20 Heinä 20147min

7MS #20: Moving from GoDaddy to DNSimple (audio)

7MS #20: Moving from GoDaddy to DNSimple (audio)

In this episode I talk about why I’m pulling my domains from GoDaddy, and making DNSimple their new home. Download: 7MS #20: Moving from GoDaddy to DNSimple (audio) Show notes: The service I’m talking about in this podcast is DNSimple. Troy Hunt‘s humorous/awesome article pushed me over the edge and convinced me to give DNSimple a…

15 Heinä 20147min

7MS #19: Kioptrix! (audio)

7MS #19: Kioptrix! (audio)

In this episode I talk about a deliciously vulnerable series of VMs called Kioptrix, and how you can use them to sharpen your pentesting skills. Download: 7MS #19: Kioptrix! (audio) Show notes: The Kioptrix series of VMs is here: http://www.kioptrix.com/blog/test-page/ and here: http://vulnhub.com/?q=kioptrix&sort=date-des&type=vm. Got approved for my OSCP training and I start it in a few…

5 Heinä 20147min

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