7MS #506: Tales of Pentest Pwnage - Part 32
7 Minute Security3 Helmi 2022

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!

Jaksot(684)

7MS #500: Interview with John Strand

7MS #500: Interview with John Strand

HAPPY 500 EPISODES, FRIENDS! That's right, 7MS turned 5-0-0 today, and so we asked John Strand of Black Hills Information Security to join us and talk about all things security, including the John/BHIS superhero origin story, the future of pentesting, the (perceived) cybersecurity talent shortage, how to get started with good security practices in your organization, and more! P.S. check out John's first visit to the show here.

22 Joulu 202158min

7MS #499: Desperately Seeking a Super SIEM for SMBs - Part 6

7MS #499: Desperately Seeking a Super SIEM for SMBs - Part 6

Today we have some cool updates on this SIEM-focused series we've been doing for a while. Specifically, I want to share that one of these solutions can now detect three early (and important!) warning signs that bad things are happening in your environment: ASREPRoasting WDigest flag getting flipped (reg add HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\WDigest /v UseLogonCredential /t REG_DWORD /d 1) Restricted admin mode getting enabled (reg add HKLM\System\CurrentControlSet\Control\Lsa /t REG_DWORD /v DisableRestrictedAdmin /d 0x0 /f) - see n00py's blog for more info

16 Joulu 202121min

7MS #498: Securing Your Mental Health - Part 2

7MS #498: Securing Your Mental Health - Part 2

Hi everybody, today we're continuing a series we started way back in June called Securing Your Mental Health. Today I talk about some easy and relatively cheap things I'm doing to try and shutdown negative thoughts, punch imposter syndrome in the face, and be an overall happier and more positive person.

13 Joulu 202117min

7MS #497: The Stress and Satisfaction of Offering Live Security Training

7MS #497: The Stress and Satisfaction of Offering Live Security Training

Hey friends, today I'm giving you a peek behind the curtain of our Light Pentest LITE training to talk about the software/hardware we use to make it sing, the growing pains - and OMG(!) moments - that forced us to build in more infrastructure redundancy, and the cool (and expensive!) cloud options we're considering to offer a self-paced version of the course.

2 Joulu 202151min

7MS #496: Tales of Pentest Pwnage - Part 30

7MS #496: Tales of Pentest Pwnage - Part 30

Today's tale of pentesting has a bunch of tips to help you maximize your pwnage, including: The new Responder DHCP poisoning module All the cool bells and whistles from CrackMapExec which now include new lsass-dumping modules! Speaking of lsass dumping, here's a new trick that works if you have Visual Studio installed (I bet it will be detected soon). I close out today's episode with a story about how my Cobalt Strike beacons got burned by a dating site!

24 Marras 202148min

7MS #495: Desperately Seeking a Super SIEM for SMBs - Part 5

7MS #495: Desperately Seeking a Super SIEM for SMBs - Part 5

Today we continue our SIEM/SOC evaluation series with a closer look at one particular managed solution and how it fared (very well) against a very hostile environment: the Light Pentest LITE pentesting course! Spoiler alert: this solution was able to detect: RDP from public IPs Password spraying Kerberoasting Mimikatz Recon net commands Hash dumping Hits on a "honey domain admin" account Users with non-expiring passwords Hits on the SSH/FTP/HTTP honeypot

17 Marras 202139min

7MS #494: Interview with Josh Burnham of Liquid Web

7MS #494: Interview with Josh Burnham of Liquid Web

10 Marras 202145min

7MS #493: 7MOIST - Part 2

7MS #493: 7MOIST - Part 2

Hey, remember back in episode #357 where we introduced 7MOIST (7 Minutes of IT and Security Tips)? Yeah, me neither :-). Anyway, we're back with the second edition of 7MOIST and have some cool pentesting and general IT tips that will hopefully make your life a little awesome-r: Stuck on a pentest because EDR keeps gobbling your payloads? SharpCradle might just save the day! CrackMapExec continues to learn new awesome tricks - including a module called slinky that plants hash-grabbing files on shares you have write access to! Browsing 17 folders deep in Windows Explorer and wish you could just pop a cmd.exe from right there? You can! Just click into the path where you're browsing, type cmd.exe, hit Enter and BOOM! Welcome to a prompt right at that folder!

4 Marras 20217min

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