7MS #441: SharpGPOAbuse
7 Minute Security15 Marras 2020

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.

Jaksot(691)

7MS #154: Friday Infosec News and Links Roundup

7MS #154: Friday Infosec News and Links Roundup

Episode show notes are here: https://7ms.us/7ms-154-friday-infosec-news-and-links-roundup/.

12 Helmi 201613min

7MS #153: OFF-TOPIC - Ex Machina (and special musical guest)

7MS #153: OFF-TOPIC - Ex Machina (and special musical guest)

Today's episode is a movie review of Ex Machina (how the FRICK do you pronounce that?) and closes out with special musical guest, Sweet Surrender!

10 Helmi 201611min

7MS #152: Review of the Almond 2015 Wireless Router

7MS #152: Review of the Almond 2015 Wireless Router

This is a mini-review of the Almond 2015 router by Securifi. This is NOT a paid advertisement or endorsement. I just happen to REALLY like this little router.

8 Helmi 201610min

7MS #151: Friday Infosec News and Links Roundup

7MS #151: Friday Infosec News and Links Roundup

Here are some of my favorite stories and links for this week! Training opportunities NMAP course from Udemy - $24 for a limited time (I think) How to handle the the thoughtless compliance zombie hordes - by BHIS is coming up Tuesday February 16th from 2-3 ET. The price is free! Pivot Project touts itself as "a portfolio of interesting, practical, enlightening, and often challenging hands-on exercises for people who are trying to improve their mastery of important cybersecurity skills. News It is absurdly easy for attackers to destroy your Web site in 10 minutes. Secure your home network better using advice from the SANS Ouch! newsletter. Chromodo (part of Comodo's Internet Security)disables same-origin policy which basically disables Web security. Wha?! Virus total now looks at firmware images as well. We can soon wave goodbye to Java in the browser forever!. Kinda. Tools Here's a nice SSL/TLS-checking checklist for pentesters. Kali is moving to a rolling release configuration pretty soon. Update yours before April 15!

5 Helmi 201611min

7MS #150: OFF-TOPIC-Bone Tomahawk / Goodnight Mommy / Comedy Loves Misery

7MS #150: OFF-TOPIC-Bone Tomahawk / Goodnight Mommy / Comedy Loves Misery

Preview16 wordsIn today's off-topic episode I review the following movies: Bone Tomahawk Goodnight Mommy Misery Loves Comedy

3 Helmi 201610min

7MS #149: Securing Your Life - Part 3

7MS #149: Securing Your Life - Part 3

This episode continues the series on securing your life - making sure all the security stuff related to your life is in order. Today we're particularly focusing on preparing to travel. What if (God forbid) the plane goes down? Who has access to your money, passwords, etc.?

1 Helmi 20168min

7MS #148: OFF-TOPIC - Apple Watch Review

7MS #148: OFF-TOPIC - Apple Watch Review

Yep, there are tons of people/blogs/magazines/children/pets who have provided reviews of the Apple Watch. This is mine.

28 Tammi 20169min

7MS #147: DIY Hosted Mutillidae

7MS #147: DIY Hosted Mutillidae

In this episode I talk about how to build a cheap hosted Mutillidae server to safely hack away on while keeping other Internet prowlers out. Here are the basic commands to run to lock down the Digital Ocean droplet's iptables firewall: *Flush existing rules* **sudo iptables -F** *Allow all concurrent connections* **sudo iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT** *Allow specific IPs/hosts to access port 80* **sudo iptables -A INPUT -p tcp -s F.Q.D.N --dport 80 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT** *Allow specific IPs/hosts to access port 22* **sudo iptables -A INPUT -p tcp -s F.Q.D.N --dport 22 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT** *Block all other traffic:* **sudo iptables -P INPUT DROP** *Provide the VPS loopback access:* **sudo iptables -I INPUT 1 -i lo -j ACCEPT** *Install iptables-persistent to ensure rules survive a reboot:* **sudo apt-get install iptables-persistent** *Start iptables-persistent service* **sudo service iptables-persistent start** *If you make iptables changes after this and they don't seem to stick, do this:* **sudo iptables-save > /etc/iptables/rules.v4** See this Digital Ocean article for more information.

26 Tammi 20168min

Suosittua kategoriassa Politiikka ja uutiset

rss-ootsa-kuullut-tasta
ootsa-kuullut-tasta-2
aikalisa
rss-podme-livebox
politiikan-puskaradio
rss-vaalirankkurit-podcast
otetaan-yhdet
et-sa-noin-voi-sanoo-esittaa
rikosmyytit
linda-maria
rss-hyvaa-huomenta-bryssel
the-ulkopolitist
rss-sinivalkoinen-islam
rss-kaikki-uusiksi
rss-raha-talous-ja-politiikka
rss-pallo-keskelle-2
rss-mina-ukkola
rss-polikulaari-humanisti-vastaa-ja-muut-ts-podcastit
rss-merja-mahkan-rahat
rss-50100-podcast