7MS #441: SharpGPOAbuse

7MS #441: SharpGPOAbuse

Hello friends! Sorry to be late with this episode (again) but we've been heads-down in a lot of cool security work, coming up for air when we can! Today's episode features:

  • A little welcome music that is not the usual scatting of gibberish I torture you with

  • Some cool tools I'm playing with in the lab that we'll do future episodes on in the future:

    • DetectionLab to practice detecting all the bad things!
    • BadBlood to dirty up your AD (your test AD with groups, computers, permissions, etc.). I wish the user import script would let you choose a list of bad passwords to assign the users, but you can also run it manually if you want.
    • Cobalt Strike - we're doing a demo right now!

Most of today's episode focuses on SharpGPOAbuse, a tool that can be used to abuse "generic write" access to GPOs (which you might identify after running BloodHound). Here's a sample syntax you could run:

SharpGPOAbuse.exe --AddUserTask --TaskName "Totes Safe Windoze Updatez" --Author SAMPLECO\ADMINISTRATOR --Command "cmd.exe" --Arguments "/c net group \"Domain Admins\" SomeLowPrivUser /ADD DOMAIN" --GPOName "Name of GPO with Generic Write Access"

This will push a ScheduledTasks.xml file to \\sample.company\Policies\LONG-STRING-REPRESENTING-THE-GPO-ID\User\Preferences\ScheduledTasks

Now if you find that the task is not pushing correctly, it may be that SharpGPOAbuse.exe hasn't been able to update either the GPT.INI file (in the root of the GPO path) and/or the versionNumber value assigned to the GPO itself.
If you need to adjust the versionNumber and GPT.INI value manually, definitely read this Microsoft article so you know how the number is generated and how to increment it properly. This flippin' sweet RastaMouse blog article also helped this click for me.

If you can't seem to update versionNumber using the PowerShell in Rasta's article, you can also open up ADSI Edit and navigate to Default naming context > DC=your,DC=com > CN=System > CN=Policies > CN=LONG-STRING-REPRESENTING-THE-GPO-ID then get the properties of the folder, scroll down and manually adjust the value for versionNumber.

Avsnitt(690)

7MS #89: AppSpider

7MS #89: AppSpider

Today we're talking about a new (to me) Web site/app scanning tool called AppSpider by Rapid7. Again, this isn't a commercial or paid advertisement. I just like sharing things that I like and use.

27 Aug 20158min

7MS #88: Glasswire

7MS #88: Glasswire

This episode's about a cool security app called GlassWire, which is (kind of) a firewall on steroids. I love it! Oh, and this is not an endorsement or a commercial :-)

25 Aug 20156min

7MS #87: Presenting the Right Findings to the Right Audience

7MS #87: Presenting the Right Findings to the Right Audience

Today I talk about challenge I run into when I'm delivering to a mixed audience of C-level folks and IT people. How do you keep things high level enough so everybody "gets it" but also go level enough that the recommendations have some teeth?

20 Aug 20157min

7MS #86: OSWP-The Final Chapter!

7MS #86: OSWP-The Final Chapter!

This episode concludes the gripping, thrilling, exciting, awesome-ing, death-defying, unsettling, rattling series on OSWP (Offensive Security Wireless Professional). Specifically, I talk (as much as I can without getting into trouble) about the exam and give you some pointers to pass it!

18 Aug 20157min

7MS #85: What is The Penetration Testers Framework (PTF)?

7MS #85: What is The Penetration Testers Framework (PTF)?

Need an easy way to create a modular/mobile kit of pentest tools to take with you from machine to machine? And ALSO be able to update all those modules in one command? Then check out the PTF! That's what we're talkin' about on today's podcast.

14 Aug 20157min

7MS #84: DIY Pwn Pad

7MS #84: DIY Pwn Pad

Hey have you heard of Pwn Pads? They're an awesome network pentesting tool that leverages a Nexus tablet - which you can either buy right from Pwnie Express, or create your own if you have a certain model of Nexus lying around. I just happened to have the right Nexus model around, so this podcast episode chronicles my trial and error (mostly error) in making a DIY Pwn Pad! P.S. to get the Android tools installed on Ubuntu 14.04, run these commands: -- sudo add-apt-repository ppa:nilarimogard/webupd8 sudo apt-get update sudo apt-get install android-tools-adb android-tools-fastboot --

12 Aug 20157min

7MS #83: Wifi Pineapple First Impressions

7MS #83: Wifi Pineapple First Impressions

in this episode I talk about my first hands-on experience with a Wifi Pineapple, and why you'll probably want one too.

6 Aug 20158min

7MS #82: OSWP-Part 3

7MS #82: OSWP-Part 3

The OSWP series is coming to a close. One final episode today and then the four-quel episode will be all about the test!

4 Aug 20157min

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