Eric's Thoughts

I saw that the Insomni'hack Teaser 2018 CTF was announced and I thought that would be an opportunity to progress and learn something new. As we already participated in a CTF with a group from our company, I thought we could use the same group and participate here. Unfortunately, of all the ~10 team members, only two thought this had enough priority in their calendar. The challenge started at Saturday 11am local time and ended Sunday night 11pm. I started with 90 minutes delay and my colleague told me that the first and easy challenge is a trap, where it says something like "wall of shame" if you copy something. I didn't want to hear much before it started, so I tried myself. There were 12 challenges and the site was broken in IE, but Chrome works fine: overview screen, solved challenge in green Welcome Challenge The first (welcome) challenge presented itself like this: warmup challenge So it says there to " nc welcome.teaser.insomnihack.ch 42315 &qu

I participated in the Hackvent 2017 . This is a nice CTF-like event with a new challenge every day during Advent. It starts easy and gets harder with later challenges. Here's my write-up of the challenges and how I solved them (for those I did). I did not finish all of them, much less on the same day, but at least the easy and medium ones are here. All files that were downloadable are included here as well, with a link to pastebin (base64 encoded and days 18 and 21 additionally zipped). Let me know if you find any mistakes or if you have additional comments. I think I made about 24 points in total, but you needed 60 points minimum for getting a bronze title and 120 points maximum (I think 115 was required for gold or so). One big problem was to solve everything on time. As usual, I learned a few things and I can hopefully learn even more by reading the correct solutions. Maybe this write-up can help you too. Day 1 - 5th anniversary Level: easy Text and hints: Day 01: 5th a