I was writing a forensics CTF challenge for a CTF organized by ISC2 SG Youth Wing and I wanted to write a challenge where the participants had to decrypt some HTTPS traffic with a SSLKEYLOGFILE to ...
I’ve always had much appreciation for all the low-level things from assembly to compilers and more. In my pursuit to better understand these mechanisms, I’m often left with many questions on what...
At this year’s DEFCON, I participated in the Red Team Village CTF as NUSeXcel (a collaboration between NUS Greyhats and HTX) and we managed to take first place and also win a DEFCON Black Badge! Th...
Summary This research will dive into how symbol resolution works (in ELF), and how common tooling such as decompilers and disassemblers parses the symbol resolution metadata to identify imported/l...
This year, I participated as NUS Greyhats in the DSTA’s BrainHack CDDC University Category and we came out first place once again ✌️ nus greyhats at cddc! Check out the full list of challenges &...
9 months after my last hardware venture playing around with the Off-By-One Conference Badge, I once again find myself intrigued with yet another conference badge. Although I was initially hesitant...
Foreword The Flare-On Challenge is a single-player series of Reverse Engineering challenges, some of which are inspired from real-world problems faced by the mandiant team during their malware ...
On Windows, the operating system implements its own unique exception handling mechanisms — Structured Exception Handling (SEH) and Vectored Exception Handling (VEH) — which is an extension on top...
The Home Team Science and Technology Agency (HTX) invited me and my friends to compete alongside them in this year’s DEFCON Red Team Village. Although I didn’t get to fly to Las Vegas to experienc...
What are CTFs? 👾 CTFs are gamified cybersecurity competitions, where you solve different challenges for “flags”, or an answer of sorts! In true l33t hacker terms, this would be sort-of hacking an...