Note You can see the detailed writeup at the following link My Challenge Gemastik 2024 Name Category Tags Difficulty 46_68x RE Flag Checker, VM, Modified Crypto Algorithm medium Gemastik 2023 Name Category Tags Difficulty FCaaS RE Flag Checker, Runtime ELF Generation easy-medium Past CTF Solution Year CTF Name 2023 utctf, nullcon (todo), kalmar (todo), acsc (todo), lactf, bi0sctf, irisctf 2022 nitectf (Partial Solution), final oscctf, uactf, aractf, dicectf, findit, imaginary, litctf, mchctf, oscctf, typhoon 2021 IJCTF, BtSCTF, CodefestCTF, PicoCTF, FoobarCTF, angstromCTF, BSidesCanberraCTF, RitsecCTF, DVCTF, vishwaCTF, DarkConCTF, BSidesDelhiCTF 2020 UIUCTF, AsisQuals, Defcon911, FirstCTF, Redpwn, Batpwn, CastorsCTF, DeepCTF, UNITYQualification, UTCTF, zer0pts Lifetime cryptopals Unmanaged Solver gist.github.com