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!

Episoder(684)

7MS #107: I'm Going to PWAPT!

7MS #107: I'm Going to PWAPT!

Hey I'm going to PWAPT this week (http://www.eventbrite.com/e/practical-web-application-penetration-testing-with-tim-tomes-lanmaster53-tickets-16718889649), so in this episode I talk about that...and how I'll probably be too info-overloaded to record anything on Thursday :-). Oh, and I had a fun Web app pentest this week that I wanted to share some fun bits on.

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7MS #106: A Day in the Life of an Information Security Analyst

7MS #106: A Day in the Life of an Information Security Analyst

A listener wrote in asking some questions about "a day in the life of" a security analyst, so here's my best stab at it!

30 Okt 201510min

7MS #105: OFFTOPIC-Big Bag of Random Sauce

7MS #105: OFFTOPIC-Big Bag of Random Sauce

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7MS #104: LANTurtle First Impressions

7MS #104: LANTurtle First Impressions

Hey I just got a LANTurtle and....these are my first impressions!

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7MS #103: OFFTOPIC-I Was in a Movie Once

7MS #103: OFFTOPIC-I Was in a Movie Once

This is an off-topic episode about the time I was in the holiday comedy super-smash laugh-fest, Jingle All the Way.

20 Okt 20157min

7MS #102: Recon-ng!

7MS #102: Recon-ng!

I'm a big fan of Recon-ng and you should be too! Check it out - and learn more about Tim Tomes, its creator - at www.lanmaster53.com. And here's the video I mentioned in the podcast - my first look at Recon-ng in action: https://www.youtube.com/watch?v=vkmNTNl6urw

15 Okt 20158min

7MS #101: OFFTOPIC-I Am Chris Farley

7MS #101: OFFTOPIC-I Am Chris Farley

The new(ish) Chris Farley documentary is fantastic - see it!

14 Okt 20157min

7MS #100: Assessment Curses Can Be Blessings

7MS #100: Assessment Curses Can Be Blessings

Ever had an assessment that you thought would be the death of you? I had one recently, but after sticking it out, it turned out to be a blessing in disguise.

9 Okt 20157min

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