Niklaus, Manuel and me had a great time speaking about one of the latest Tablet PCs from DPRK at 33C3 this year. Our work on RedStar OS from last year revealed a nasty watermarking mechanism that can be used to track the origin and distribution path of media files in North Korea. We have seen some interesting dead code in some of RedStar’s binaries that indicated a more sophisticated mechanism to control the distribution of media files. We got hands on a Tablet PC called “Ul-lim” that implemented this advanced control mechanism.
In this post I’ll discuss configuration approaches for systems which usually have been configured with “static” IP parameters in the IPv4 age/context (like servers in data centers). When it comes to IPv6 there are more options and we’ll have a look at their implications and potential advantages/disadvantages.
We had to make some tough choices regarding our TROOPERS17 Main Conference Agenda. Thank you again to everyone for submitting! The full agenda will be published later this week, but for now here are the next round of talks!
Fuzzing is a very old technique to find bugs and vulnerabilities in software. However it has seen a new push in recent years due to vastly improved tools. The compilers gcc and clang have received Sanitizer tools that allow finding a lot of bugs like use after free errors and out of bounds reads that are otherwise very hard to find.
Recently I had the pleasure to join the PowerOfCommunity conference in Seoul. Florian and Felix attended the conference in the past and enjoyed it a lot, so I took the opportunity to join this year. From what I had heard the conference is highly technical, offensive security and community focused (surprise 😉 ). Boy did they deliver!
Located in a hotel next to a nice park and close to the famous Gangnam district in Seoul we came together to feel the power of community. The conference was planned for two days and offered two tracks per day. Several key talks were presented for everyone. Continue reading “PoC Con Seoul 2016”
It is the end of the year and we are hoping it is not too hectic of a time for you all! But if it is, hopefully the announcement of our next round of TROOPERS17 talks is enough to get you in the TROOPERS (if not the holiday) spirit 🙂
Francis Alexander & Bharadwaj Machiraju: How we hacked Distributed Configuration Management Systems
With increase in necessity of distributed applications, coordination and configuration management tools for these classes of applications have popped up. These systems might pop-up occasionally during penetration tests. The major focus of this research was to find ways to abuse these systems as well as use them for getting deeper access to other systems. Continue reading “2nd Rounds of TROOPERS17 Talks!”
Even if the CFP for TelcoSecDay 2017 is officially closed, I am still getting mails in. First of all: thank you for all your great feedback! As the TelcoSecDay is a complimentary and non-public event with highly specialized topics, it only works by sharing knowledge with each other. But please keep in mind that the speaker-slots are limited and I have to make a decision at some point of time.
Anyhow, I am looking forward for a great event and I am proud to publish the first accepted talks: Continue reading “TelcoSecDay 2017 – First Talks Published”
While doing heap research on Linux processes (results are going to be published soon), I came across the bot from the Mirai Botnet. As already mentioned in the blog post by Brian, the Mirai bot uses obfuscated configuration data which contains e.g. the CnC server. When now confronted only with a bot (e.g. in the context of a running task or the ELF binary), but without the according source code, the decryption of this configuration data for e.g. incident analysis purposes might not be easily possible (with the python script from the blog post), if the key has been changed.
But in this case that is not a problem at all, because Continue reading “A short Addendum on the Mirai Botnet Blog Post”
Recently we posted first part of our Bluetooth research diary. Today, we want to continue on that topic and tell you about Bluetooth proxying and packet replay with a new tool.
This time we had a new gadget to play with: our colleague Florian Grunow shared with us a curious IoT device – Bluetooth socks… real socks that you control with an app to heat your feet. The future is here… 😉 Continue reading “Research Diary: Bluetooth. Part 2”