7MS #455: Tales of Internal Network Pentest Pwnage - Part 24
7 Minute Security19 Helmi 2021

7MS #455: Tales of Internal Network Pentest Pwnage - Part 24

Hey everybody! Sorry that we're late again with today's episode, but I got COVID shot #2 and it kicked my behind BIG TIME today. But I'm vertical today and back amongst the living and thrilled to be sharing with you another tale of pentest pwnage! Yeah! This might be my favorite tale yet because:

  • I got to use some of my new CRTP skills!

  • Make sure on your pentests that you're looking for "roastable" users. Harmj0y has a great article on this, but the TLDR is make sure you run PowerView with the -PreauthNotRequired flag to hunt for these users:

Get-DomainUser -PreauthNotRequired
  • Check for misconfigured LAPS installs with Get-LAPSPasswords!

  • The combination of mitm6.py -i eth0 -d company.local --no-ra --ignore-nofqdn +
    ntlmrelayx -t ldaps://domain.controller.ip.address -wh attacker-wpad --delegate-access is reeeeeealllllyyyyyyy awesome and effective!

  • When you are doing the --delegate-access trick, don't ignore (like I did for years) if you get administrative impersonation access on a regular workstation. You can still abuse it by impersonating an admin, run secretsdump or pilfer the machine for additional goodies!

  • SharpShares is a cool way to find shares your account has access to.

  • I didn't get to use it on this engagement but Chisel looks to be a rad way to tunnel information

  • Once you've dumped all the domain hashes with secretsdump, don't forget (like me) that you can do some nice Mimikatz'ing to leverage those hashes! For example:

sekurlsa::pth /user:administrator /ntlm:hash-of-the-administrator-user /domain:yourdomain.com

Do that and bam! a new command prompt opens with administrator privileges! Keep in mind though, if you do a whoami you will still be SOMEWORKSTATION\joeblo, but you can do something like psexec \\VICTIM-SERVER cmd.exe and then do a whoami and then POW! - you're running as domain admin!

  • Once you've got domain admin access, why not run Get-LAPSPasswords again to get all the local admin passwords across the whole enterprise? Or you can do get-netcomputer VICTIM-SERVER and look for the mc-mcs-admpwd value - which is the LAPS password! Whooee!!! That's fun!

  • Armed with all the local admin passwords, I was able to run net use Q: \\VICTIM-SERVER\C$" /user:Adminisrator LAPS-PASSWORD to hook a network drive to that share. You can also do net view \\VICTIM-SERVER\ to see all the shares you can hook to. And that gave me all the info I needed to find the company's crowned jewels :-)

Jaksot(683)

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

7MS #492: Tales of Pentest Pwnage - Part 29

7MS #492: Tales of Pentest Pwnage - Part 29

Hello friends! We're long overdue for a tale of pentest pwnage, and this one is a humdinger! It's actually kind of three tales in one, focusing on pentesting wins using: Manual "open heart surgery" on the root of the Active Directory domain The new totally rad DHCP poisoning module of Responder An opportunity to abuse GPOs with SharpGPOAbuse (P.S. we talked about this tool about a year ago in episode 441)

28 Loka 202156min

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