7MS #449: DIY Pentest Dropbox Tips - Part 3
7 Minute Security7 Tammi 2021

7MS #449: DIY Pentest Dropbox Tips - Part 3

Happy new year! This episode continues our series on DIY pentest dropboxes with a focus on automation - specifically as it relates to automating the build of Windows 10, Windows Server 2019, Kali and Ubuntu VMs. Here's the resources I talk about in more detail on today's episode that helps make the automagic happen:

Windows VMs
This article from Windowscentral.com does a great job of walking you through building a Windows 10 unattended install. A key piece of the automation is the autounattend.xml file, which you can somewhat automatically build here, but I think you'll want to install the Windows System Image Manager to really get in the tech weeds and fully tweak that answer file. The handy AnyBurn utility will help you make ISOs out of your Windows 10 / Server 2019 customized builds.

Ubuntu VMs
I set out to build a Ubuntu 18.x box because Splashtop only supports a few Linux builds. I found a freakin' sweet project called Linux unattended installation that helps you build the preseed.cfg file (kind of like the Windows equivalent of an answer file). The area of preseed.cfg I've been spending hours dorking around with is:

d-i preseed/late_command string \

Under this section you can customize things to your heart's content. For example, you could automatically pull down and install all OS packages/updates and a bunch of third party utils you want:

in-target sh -c 'apt-get update'; \ in-target sh -c 'apt-get upgrade -y'; \ in-target sh -c 'apt-get install curl dnsrecon git net-tools nmap openssh-server open-vm-tools-desktop python3.8 python3-pip python-libpcap ubuntu-gnome-desktop unzip wget xsltproc -y'; \

Finally, the project provides a slick script that will wrap up your Ubuntu build plus an SSH key into a ready-to-go ISO:

build-iso.sh ~/.ssh/id_rsa.pub ~/Desktop/My-kool-kustomized-Ubuntu.iso

Awesome!

Kali VMs
There is some decent documentation on building a preseed.cfg file for Kali. But the best resource I found with some excellent prebuilt config file is this kali-preseed project.

Once your seed file is built, it's super easy to simply host it on a machine in your network and let Kali pull it during install. For example, if you've got a Linux box with Python on the network at 192.168.0.7, just make a temporary folder with the preseed.cfg file in it and then run:

sudo python3 -m http.server 80

Then, in your virtual environment, create a new VM and boot it to a Kali NetInstaller image. At the splash screen, hit Tab and it'll display a command line you can edit. Remove the line that says something like preseed/file=/cdrom/simple-cdd/default.preseed, add auto=true and then the URL path to your preseed file, such as url=http://192.168.0.7/preseed.cfg. The Kali will ask for a few questions, such as a username and hostname to configure, and then if you're watching your machine hosting preseed.cfg, you'll see your Kali machine grab the config file and take care of the rest from there!

Got a better/cooler/funner/faster/awesomer way to do this type of automation? Let us know!

Jaksot(703)

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

7MS #659: Eating the Security Dog Food - Part 8

7MS #659: Eating the Security Dog Food - Part 8

Today I'm excited about some tools/automation I've been working on to help shore up the 7MinSec security program, including: Using Retype as a document repository Leveraging the Nessus API to automate the downloading/correlating of scan data Monitoring markdown files for "last update" changes using a basic Python script

24 Tammi 28min

7MS #658: WPA3 Downgrade Attacks

7MS #658: WPA3 Downgrade Attacks

Hey friends, today we cover: The shiny new 7MinSec Club BPATTY updates A talk-through of the WPA3 downgrade attack, complemented by the YouTube livestream

17 Tammi 32min

7MS #657: Writing Rad Security Documentation with Retype

7MS #657: Writing Rad Security Documentation with Retype

Hello friends! Today we're talking about a neat and quick-to-setup documentation service called Retype. In a nutshell, you can get Retype installed on GitHub pages in about 5 minutes and be writing beautiful markdown pages (with built-in search) immediately. I still absolutely love Docusaurus, but I think Retype definitely gives it a run for its money.

10 Tammi 20min

7MS #656: How to Succeed in Business Without Really Crying - Part 21

7MS #656: How to Succeed in Business Without Really Crying - Part 21

Happy new year friends! Today we talk about business/personal resolutions, including: New year's resolution on the 7MinSec biz side to have a better work/life balance New training offering in the works Considering Substack as a communications platform A mental health booster that I came across mostly by accident

3 Tammi 45min

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