https://blog.238796234.xyz/categories/cscv-2025/Recent content in CSCV 2025 on k1nt4r0u's siteHugo -- gohugo.ioenCopyright (c) k1nt4r0uThu, 25 Dec 2025 22:33:30 +0700https://blog.238796234.xyz/writeups/cscv2025/cscv_2025_re/Thu, 25 Dec 2025 22:33:30 +0700https://blog.238796234.xyz/writeups/cscv2025/cscv_2025_re/<h2 class="relative group">ReezS <div id="reezs" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#reezs" aria-label="Anchor">#</a> </span> </h2> <h3 class="relative group">First wrong turn <div id="first-wrong-turn" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#first-wrong-turn" aria-label="Anchor">#</a> </span> </h3> <p>My first read on this binary was completely wrong. It looked like a normal flag checker, so I did what I usually do for that kind of challenge: identify the comparison logic, lift the constants, and script the inverse.</p>