ECW 2023 on THALIUM/tags/ecw-2023/Recent content in ECW 2023 on THALIUMHugoen-usCopyright (c) 2026, all rights reserved.Tue, 07 Nov 2023 12:00:00 +0100ECW 2023: Centralized Memory (write-up)/posts/ecw-2023-centralized-memory-write-up/Tue, 07 Nov 2023 12:00:00 +0100/posts/ecw-2023-centralized-memory-write-up/<strong>Centralized Memory</strong> was a hard Linux pwn challenge created for the European Cyber Week CTF 2023 qualifiers. This write-up covers the intended method of exploitation through a race condition, an AES padding bug and a stack overflow.ECW 2023: kaleidoscope (write-up)/posts/ecw-2023-kaleidoscope-write-up/Tue, 07 Nov 2023 12:00:00 +0100/posts/ecw-2023-kaleidoscope-write-up/<strong>kaleidoscope</strong> was a hard reverse engineering challenge created for the European Cyber Week CTF 2023 qualifiers, with a focus on Windows-specific mechanisms and VM-based obfuscation.ECW 2023: The Calculator in Shadow (write-up)/posts/ecw-2023-the-calculator-in-shadow-write-up/Tue, 07 Nov 2023 12:00:00 +0100/posts/ecw-2023-the-calculator-in-shadow-write-up/<strong>The Calculator in Shadow</strong> was a hard pwn challenge created for the European Cyber Week CTF 2023 qualifiers. It included exploiting a RISC-V calculator running on top of a customized QEMU that featured a poorly implemented shadow stack.