Summary of “Software-Defined Radio applied to security assessments” at Troopers21

The training Software-Defined Radio applied to security assessments was held by Sébastien Dudek at Troopers21 and was remotely organized – like most other events – due to Covid-19. Once we were all caffeinated, we had an exciting journey through basically all things radio.

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Breaking, Building, Events

ACM WiSec 2020

Last week I attended ACM WiSec. Of course, only virtually. The first virtual conference I attended. Coincidentally, it was also the first conference I presented at. While the experience was quite different from a “real” conference, the organizers did a great job to make the experience as good as possible with, for example, a mattermost instance to interact with other conference participants.

In the following, I will list a few talks and papers that I either found very interesting or that generally stood out to me:

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TROOPERS20 Training Teaser: Attack And Defence In AWS: Chaining Vulnerabilities To Go Beyond The OWASP Top 10

Attackers are everywhere. They are now on the cloud too! Attacking the most popular cloud provider – AWS, requires the knowledge of how different services are setup, what defences do we need to bypass, what service attributes can be abused, where can information be leaked, how do I escalate privileges, what about monitoring solutions that may be present in the environment and so on! We try to answer these questions in our intense, hands-on scenario driven training on attacking and subsequently defending against the attacks on AWS.

As an attacker or defender, if you have ever asked any of the following questions, this training is for you:

  • Is there a process to attacking the cloud or do we go after the services as and when they are discovered?
  • Is SSRF the only vulnerability to access the metadata service on EC2?
  • How do I use stolen AWS secret keys to attack further?
  • How do I hide cover my tracks in AWS environment?
  • If I can’t see a service due to security group, can I still attack it?
  • How do I create better wordlists to discover and exploit S3 buckets that have uncommon names?
  • Can I impersonate other users within AWS?
  • Is there a way to extract secrets from AWS Lambda?
  • How do I prevent credential compromise in AWS?
  • How can I be sure there is no attacker already within my cloud infrastructure?
  • How do I enumerate and move between accounts that are part of AWS organisations?

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TROOPERS20 Training Teaser: Hacking Node.js & Electron apps, shells, injections and fun!

Did you know that in the ever evolving field of Web and Desktop apps, it turns out these can all now be powered with JavaScript? You read that right: JavaScript is now used to power both web apps (Node.js) as well as Desktop apps (Electron). What could possibly go wrong?

So, the burning question is: how does this affect Web and Desktop app security? If you want to find out, come to our training and you will experience this in a 100% hands-on fashion! 🙂

You will learn about how to hack Web and Desktop apps, with a special focus in JavaScript attack vectors tailored for Node.js and Electron but also broader attack vectors that will also work against regular Web and Desktop apps.

What are the main attack vectors against Web and Desktop apps? How can apps defend against these? How do JavaScript frameworks change this? Come to find out!

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Blackhoodie@Troopers 2020

Once again, we are super excited to announce that Blackhoodie is happening at Troopers 2020. This is the 3rd time that Blackhoodie is joining with Troopers. As always, one of the main motivation for Blackhoodie is bringing more women into reversing and other core security topics. So we would like to see more women apply to the training slots. However, if you are not a woman and still feel really excited about Blackhoodie, you are welcome to apply. The registration is open now.  Please hurry up and make your registration now. We will close the registration once the seats are filled up with enough quality submissions. We do have a very limited number of seats at this training site. So we apologize in advance if we can’t accommodate everyone, even though we wish we could!

How to register?

Blackhoodie is a free event. In order to register, go to this link and fill in your details with a brief motivation of why you would like to join Blackhoodie. We will get back to you with the selection outcome as soon as the registration is closed. Current deadline for registration is Feb 12th 2020.


When and where?

The event is happening on March 15th, 16th and 17th. We will have an introduction session with lightening talks on March 15th (Sunday) starting at 13:00. On 16th and 17th, there will be workshops. We just have one track with 3 trainings one after the other.

Print Media Academy
Kurfürsten-Anlage 52-60
69115 Heidelberg Germany
Getting there


15th March 2020 – Ligtening talks starting from 13:00

16th – 17th March 2020 – Trainings

Training 1: How to (mis)use TLS? by Caroline 
Let’s understand how TLS works and demystify some famous flaws in TLS:
what went wrong ? How could we exploit it ? How was is fixed ? 
To answer this questions, the idea is to get our hands on networking, 
man-in-the-middle, rogue certificates crafting, heartbleed exploitation.
Material: have a kali linux virtual machine installed. 
If you don’t know how to do that, I can provide an installation guide.
Training 2: Untangling C++: Reversing and Auditing C++ Binaries by Gal Zaban
This training is an advanced class for security researchers who want to 
expand their horizons and skills in reversing modern C++ binaries. 
C++ Binaries are full of mysteries, they have objects, inheritance, 
templates, vtables and many more and reverse engineering them is a task on 
its own. The training will explain advanced C++ reverse engineering topics 
including techniques and tools for dealing with research of C++ Binaries.
We will start with the identification of basic C++ patterns including 
identifying statics, globals, arrays, etc. Than we will continue with objects
and inheritance in a binary and how to represent all of those in IDA, 
afterward, we will study work methods and design patterns in C++.
Finally, we will practice, fight and untangle deep and modern C++ programs 
using both static and dynamic analysis.
Class outline:
 - C++ Reverse Engineering Intro.
 - Globals, Statics and Arrays
 - Objects + Objects Creation.
 - Inheritance.
 - Multiple Inheritance.
 - Understanding relationship between objects.
 - Virtual tables and virtual calls.
 - Templates.
 - Important Design Patterns.
 - IDA Pro- concepts and working methods for reverse engineering C++.
 - Representation of C++ objects in IDA.
 - Tips for creating setup and environment for C++ binaries.
 - Existing tools for C++.
 - Deep understanding of a C++ Binary's Logic.
 - Conclusions and wrap-up.
 - Suggestions for future tasks and resources to keep learning and improving C++ RE skills.
Training 3: Attacking Active Directory by Kelly Villanueva
Active Directory, a service used to manage users, computers, and other 
objects in corporate networks,is used by almost all large corporations, 
making it a prime target for exploitation and abuse. Despite efforts to 
patch existing vulnerabilities and standardize best practices, the security 
exposure derived from Active Directory increases as environments become 
more complex, and offensive security professionals can leverage 
Active Directory to perform activities like lateral movement, 
credential theft, and reconnaissance.
This workshop will provide an overview of Active Directory fundamentals, 
explain common attack primitives, and use open source tools to get 
hands-on experience attacking Active Directory.

If you have any further questions, you can contact me by



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TROOPERS20 Training Teaser: TLS in the Enterprise – Post Quantum Security

Our workshop “TLS in the enterprise” was held for the first time at Troopers 2018 and was our special contribution to the IT Security world to increase the usage of TLS and point out the pitfalls, when switching to TLS.

But time is changing and TLS is a kind of standard nowadays, at least when looking at HTTPS, but there are still a lot of things to do regarding other protocols like

  • Jabber
  • LDAP
  • Telnet
  • SMTP, POP3 and IMAP
  • SIP and RTP
  • MySQL
  • Postgres
  • SSL based VPNs

just to name a few ;-). We will cover that in our training too, but the most important new stuff will be Post Quantum Security and how it will affect the future of encryption. We will talk about crypto algorithms and which of them can still be used in the future, we will talk about timelines and preparation (including the actual state of technology) like develop your master plan and we will try to clear up the myths regarding quantum computers to get your enterprise ready for the post quantum era :-).

Become aware that quantum computers will likely break most traditional public key crypto and every secret it protects. Examples for affected crypto: RSA, DH, ECC, ElGamal, PKI, digital certificates, digital signatures, VPNs, WiFi protection, smartcards, HSMs, crypto currencies, two factor authentication which relies on digital certificates (e.g. FIDO keys, Google security keys, etc.) and of course TLS.

And the quantum computers are not that far away, as the following timeline proves:

  • 1998: first working quantum computer
  • 2016: Google develops quantum computer
  • 2017: D-Waves announces the commercial availability of the D-Wave 2000Q™ quantum computer
  • 2017: IBM and Microsoft announces quantum computers
  • 2018: several quantum microprocessors available
  • 2019: likely over 100 quantum computers available

hmm, you are afraid now? No ;-)! You are curious? You got the point, it’s time to get prepared. The early bird catches the worm (which btw. is also true for getting your Troopers ticket and workshop seat 😉 ) the NSA said, and it moved to post-quantum in January 2016.

So to satisfy your curiosity, see you at our workshop “TLS in the enterprise” at Troopers 2020.


Frieder and Michael

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TROOPERS20 Training Teaser: Swim with the whales – Docker, DevOps & Security in Enterprise Environments

Containerization dominates the market nowadays. Fancy buzzwords like continuous integration/deployment/delivery, microservices, containers, DevOps are floating around, but what do they mean? What benefits do they offer compared to the old dogmas? You’re gonna find out in our training!

We are going to start with the basics of Docker, Containers and DevOps, but soon you’ll end up with your own applications running inside containers with the images residing in your own registry. Of course, following the microservices approach, and the second day hasn’t even started.After the fundamental topics of containerization are understood, you’re going to create and operate your own Kubernetes cluster. A lot of fun and challenging exercises lie ahead, to give you hands-on experience with all the technologies.

We at ERNW have not only security written on our banner, it is a mindset we share. Therefore, be prepared to get knee deep into security in regards of the discussed technologies. We will tackle the security aspects from the bottom-up, what Containerization tools can offer and how all these can be enforced and enhanced with Kubernetes to secure your clusters. From there on you are ready for the final challenge. You will jump into the role of an attacker who did compromise a Container in the cluster and escalate your privileges to Cluster Admin.

Attendees who absolved the training will have a solid understanding of container technology, especially with Docker and Kubernetes and of course the security challenges those technologies bring to the table.

So, if you’re up to a challenging training and want to get not only your feet wet with Docker and Kubernetes, you can reserve your spot for the training right here.


Thanks and kind regards,
Jan and Simon

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