I took part in the University of Augsburg's Hacking Challenge 2023 to improve my hacking and cybersecurity abilities. The challenge was a great opportunity to learn and use new strategies, and I finished 31st out of over 650 participants by solving 14 of 24 questions. You had one week to solve the tasks and it was a lot of fun. I recommend participating. Additional information about the event is available here.
These are writeups of the tasks I solved during the hacking challenge 2023. The problems were divided into several areas (Warm-Up, Crypto, ReverseMe, Security4Fun!, Steganographie) and to solve a problem, a flag with the format HSAINNOS{answer} has to be found and submitted here. A different number of points was awarded depending on the difficulty of the task: warm-up: 10, easy: 30, medium: 50, difficult: 100.
- Warmup:
- 10 points: Let's START.md (Monoalphabetic substitution)
- 10 points: HEXHEX.md (ASCII)
- Crypto:
- 30 points: 007RSA.md (RSA - Rivest–Shamir–Adleman - encryption algorithm)
- 50 points: Magical Hashtags.md (SHA - Secure Hash Algorithms)
- 50 points: Pixelbrei.md (Additive Mixing / Steganography)
- ReverseMe:
- 50 points: Strings.md (String extraction)
- 50 points: crXptOgRaphy.md (Reverse engineering)
- Security4Fun!:
- 30 points: CrunchyPCB.md (PCBs - Printed Circuit Board Design File)
- 50 points: Compressed.md (File extensions / Polygot files)
- Steganographie:
- 30 points: Augsburg International.md (Text files)
- 30 points: Dangerous to go alone.md (Gameboy emulator)
- 30 points: White Square.md (PNGs - color modes)
- 50 points: GIF_me_a_Sign.md (Image Steganography)
- 50 points: Where is Json.md (glTf - 3D objects)
