CTF
H1-212 2017: Writeup
Hackerone is hosting an event in New York this december and ran a CTF as a secondary way to get an invite to the event. I visited the H1-702 event in Las Vegas this summer and it was really fun so of course I had to give this a shot as well. The following information was given on the CTF page.
H1-702 2017: Writeups
The last few weeks Hackerone have been hosting a mobile CTF as a qualifier for their Las Vegas H1-702 event. The goal was to reverse engineer a handful of Android and iOS mobile applications and get the flags. To qualifiy for the main event you had to, apart from solving the levels, submit writeups of how you did it. These are the writeups I submitted for my solutions.
SANS Holiday Hack Challange 2016: Writeup
This post contains my report for the SANS Holiday Hack challenge 2016.
dJulkalender 2016: Writeups
The computer science chapter at my alma mater, KTH, arranges an advent calendar called "dJulkalendern". It is a CTF-like puzzle with challenges (almost) every day until christmas and also a competition. In 2013 I won the compeition and last year I ended up third. This year I managed to improve a little and take the second place.
SANS Holiday Hack Challange 2015: Writeup
This post contains the write-up I submitted for the 2015 SANS Holiday Hack challenge. Enojy.