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(682)

7MS #619: Tales of Pentest Pwnage – Part 56

7MS #619: Tales of Pentest Pwnage – Part 56

We did something crazy today and recorded an episode that was 7 minutes long!  Today we talk about some things that have helped us out in recent pentests: When using Farmer to create “trap” files that coerce authentication, I’ve found way better results using Windows Search Connectors (.searchConnector-ms) files This matrix of “can I relay this to that” has been super helpful, especially early in engagements

14 Huhti 20247min

7MS #618: Writing Savage Pentest Reports with Sysreptor

7MS #618: Writing Savage Pentest Reports with Sysreptor

Today’s episode is all about writing reports in Sysreptor.  It’s awesome!  Main takeaways: The price is free (they have a paid version as well)! You can send findings and artifacts directly to the report server using the reptor Python module Warning: Sysreptor only exports to PDF (no Word version option!) Sysreptor has helped us write reports faster without sacrificing quality

5 Huhti 202438min

7MS #617: Tales of Pentest Pwnage – Part 55

7MS #617: Tales of Pentest Pwnage – Part 55

Hey friends, today we’ve got a tale of pentest pwnage that covers: Passwords – make sure to look for patterns such as keyboard walks, as well as people who are picking passwords where the month the password changed is part of the password (say that five times fast)! Making sure you go after cached credentials Attacking SCCM – Misconfiguration Manager is an absolute gem to read, and The First Cred is the Deepest – Part 2 with Gabriel Prud’homme is an absolute gem to see.  Also, check out sccmhunter for all your SCCM pwnage needs.

29 Maalis 202436min

7MS #616: Interview with Andrew Morris of GreyNoise

7MS #616: Interview with Andrew Morris of GreyNoise

Hey friends, today we have a super fun interview with Andrew Morris of GreyNoise to share.  Andrew chatted with us about: Young Andrew’s early adventures in hacking his school’s infrastructure (note: don’t try this at home, kids!) Meeting a pentester for the first time, and getting his first pentesting job Spinning up a box on the internet, having it get popped instantly, and wondering…”Are all these people trying to hack me?” Battling through a pentester’s least favorite part of the job: THE REPORT! GreyNoise’s origin story How to build a better honeypot/honeynet

22 Maalis 202459min

7MS #615: Tales of Pentest Pwnage – Part 54

7MS #615: Tales of Pentest Pwnage – Part 54

Hey friends, sorry I’m so late with this (er, last) week’s episode but I’m back!  Today is more of a prep for tales of pentest pwnage, but topics covered include: Make sure when you’re snafflin‘ that you check for encrypted/obfuscated logins and login strings – it might not be too tough to decrypt them! On the defensive side, I’ve found myself getting *blocked* doing things like SharpHound runs, Snaffler, PowerHuntShares, etc.  Look through the readme files for these tools and try cranking down the intensity/threads of these tools and you might fly under the radar.

19 Maalis 202421min

7MS #614: How to Succeed in Business Without Really Crying - Part 16

7MS #614: How to Succeed in Business Without Really Crying - Part 16

How much fun I had attending and speaking at Netwrix Connect Being a sales guy in conference situations without being an annoying sales guy in conference situations A recap of the talk I co-presented about high profile breaches and lessons we can learn from them

8 Maalis 202436min

7MS #613: Tales of Pentest Pwnage – Part 53

7MS #613: Tales of Pentest Pwnage – Part 53

Today’s tale of pentest covers: Farming for credentials (don’t forget to understand trusted zones to make this happen properly!) Snaffling for juice file shares Stealing Kerberos tickets with Rubeus

1 Maalis 202433min

7MS #612: Pentestatonix - Part 2

7MS #612: Pentestatonix - Part 2

Hello friends, we’re still deep in the podcast trenches this quarter and wanted to share some nuggets of cool stuff we’ve been learning along the way: Snaffler – pairs nicely with PowerHuntShares to find juicy tidbits within file/folder shares Group3r – helps you find interesting and potentially abusable Group Policy Object configurations Farmer – totally awesome toolkit for dropping tricky files on shares that will do things like fire up the Webclient service for any system browsing the share (doesn’t require admin rights!) or coaxing a system into authenticating with you via HTTP or SMB

25 Helmi 202432min

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