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(683)

7MS #43: Why Web Site Vulnerability Scanners Can Ruin Your Day (audio)

7MS #43: Why Web Site Vulnerability Scanners Can Ruin Your Day (audio)

Did you know that Web site vulnerability scanners can destroy your customer sites? If not, listen to this. 7MS #43: Why Web Site Vulnerability Scanners Can Ruin Your Day (audio)

28 Feb 20157min

7MS #42: Vulnerability Scans vs. Pentests (audio)

7MS #42: Vulnerability Scans vs. Pentests (audio)

I think everybody throws around the terms “vulnerability scans” and “pentests” and they mean completely different things from one person to the next. In this episode I try to clarify the differences and distinctions (in my mind, anyways). 7MS #42: Vulnerability Scans vs. Pentests (audio)

14 Feb 20157min

7MS #41: OSCP – Part 7 (audio)

7MS #41: OSCP – Part 7 (audio)

Tried of talking about OSCP yet? Me neither! 7MS #41: OSCP – Part 7 (audio)

6 Feb 20156min

7MS #40: OSCP – Part 6 (audio)

7MS #40: OSCP – Part 6 (audio)

PART SIX of a mind-bending series all about OSCP! 7MS #40: OSCP – Part 6 (audio)

31 Jan 20157min

7MS #39: Infosec on the Disney Boat (audio)

7MS #39: Infosec on the Disney Boat (audio)

I took a Disney cruise with my family recently, and one particular aspect of the trip gave me the Big Brother heebie-jeebies. 7MS #39: Infosec on the Disney Boat (audio)

24 Jan 20158min

7MS #38: OFFTOPIC – Health and Infosec (audio)

7MS #38: OFFTOPIC – Health and Infosec (audio)

Every once in a while I thought it would be fun to go slightly off topic and talk about other stuff I’m interested in. This episode kind of has a tech twist though. I talk about how I use my iPhone and a few apps to stay at least a little bit in shape. 7MS…

17 Jan 20157min

7MS #37: Keimpx (audio)

7MS #37: Keimpx (audio)

Ever wanted to pass hashes a whole network at a time? Check out this episode, where I talk about one of my fav new tools called Keipmx. 7MS #37: Keimpx (audio)

10 Jan 20157min

7MS #36: OSCP – Part 5 (audio)

7MS #36: OSCP – Part 5 (audio)

More talk about OSCP goodness. Download: 7MS #36: OSCP – Part 5 (audio)

3 Jan 20157min

Populært innen Politikk og nyheter

giver-og-gjengen-vg
aftenpodden
aftenpodden-usa
forklart
stopp-verden
popradet
nokon-ma-ga
dine-penger-pengeradet
det-store-bildet
fotballpodden-2
aftenbla-bla
e24-podden
unitedno
rss-ness
rss-penger-polser-og-politikk
rss-fredrik-og-zahid-loser-ingenting
bt-dokumentar-2
rss-borsmorgen-okonominyhetene
oppdatert
chit-chat-med-helle