7MS #506: Tales of Pentest Pwnage - Part 32

7MS #506: Tales of Pentest Pwnage - Part 32

Today's my favorite tale of pentest pwnage (again)! This time we're talking about sAMAccountName spoofing specifically. We also talk about my always-under-construction list of things I try early in a pentest for maximum pwnage:
  • Run PingCastle
  • Do the SharpHound/BloodHound dumps
  • Run the DHCP poisoning module of Responder
  • Check the ms-DS-MachineAccountQuota value in the domain - if its at the default (10), then any user can add machines to the domain.
Why is the ability to add machines to the domain important? Because in the case of the sAMAccountName spoofing, if you have a non-domain-joined machine like I do, you need the ability to add a computer object to the domain. Check the Pentestlab.blog article for more info, but essentially, if you have an unpatched domain controller and the ability to add computer objects to the domain, you can pull off the attack. The article goes into crazy good technical detail, and here's my not-so-technical explanation:

If I was on a pentest, and the DC was called 7MS-DC01, and I could join a machine to the domain (which as a reminder - ANY user can do if the machine quota value is at the default value of 10), I could rename that machine account to be 7MS-DC01 without the dollar sign, request a TGT for the domain controller's account, then restore the machine name back to what it was before. Now, because the TGT is stored in memory, we can use the S4U2self Kerberos extension to request a service ticket using a domain admin account. And because the original ticket belong to the 7MS-DC01 machine name which now doesn't exist, Kerberos will look for 7MS-DC01$ and will issue the ticket for the requested service.

I might've butchered that explanation mom, but I tried my best!

TLDL/TLDR: find and exploit these unpatched domain controllers with noPac. Enjoy!

Avsnitt(690)

7MS #81: OSWP-Part 2

7MS #81: OSWP-Part 2

A continuation of our thrilling, exciting, mind-blowing series on OSWP (Offensive Security Wireless Professional)!

30 Juli 20158min

7MS #80: OSWP-Part 1

7MS #80: OSWP-Part 1

This episode kicks off a multi-part series all about the OSWP (Offensive Security Wireless Professional) certification.

28 Juli 20157min

7MS #79.5: UPDATE(!) on My Love-Hate Relationship with Nessus

7MS #79.5: UPDATE(!) on My Love-Hate Relationship with Nessus

In episode #79 I shared some gripes about Nessus. Those gripes were quickly answered by Tenable staff/support so I wanted to pass relevant updates on to you!

27 Juli 20156min

7MS #79: My Love-Hate Relationship with Nessus

7MS #79: My Love-Hate Relationship with Nessus

In this episode I talk about one of my favorite vulnerability scanners, Nessus, and why I want to simultaneously hug it and punch it in the neck.

23 Juli 20157min

7MS #78: It's All About Segmentation

7MS #78: It's All About Segmentation

In this episode I advocate for proper network segmentation, as doing it (well and right!) can seriously reduce your risks!

21 Juli 20157min

7MS #77: OFFTOPIC-Rickrolling Your Coworkers for Fun and Profit

7MS #77: OFFTOPIC-Rickrolling Your Coworkers for Fun and Profit

This week i used my Wifi Pineapple to scare and amuse my coworkers and lure them into a Rickroll trap. All the gory details in today's episode!

16 Juli 20157min

7MS #76: Lessons Learned from LastPass

7MS #76: Lessons Learned from LastPass

I know this is a bit late, but I wanted to talk a little about the LastPass breach and why I'll still remain a customer.

14 Juli 20157min

7MS #75: OFFTOPIC-My Son's Piano Recital

7MS #75: OFFTOPIC-My Son's Piano Recital

I wanted to share (what I think is) an amusing anecdote about my son's first piano recital, which was topped off by a kid playing the song "Lucky." Many LOLs commenced for me.

9 Juli 20159min

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