https://x3ric.com/blog/tags/elf/CTF notes, systems work, and writeups.Hugoen-usSat, 06 Jun 2026 21:41:13 +0200https://x3ric.com/blog/posts/Reversing/https://x3ric.com/blog/posts/Reversing/Sun, 13 Apr 2025 15:20:00 +0800notesnotesreversingpythonelfPractical reversing helpers for porting C logic to Python, driving local binaries, modeling binary layouts, and experimenting with ELF shared objects.https://x3ric.com/blog/posts/HackTheBox-Baby-RE-Challenge/https://x3ric.com/blog/posts/HackTheBox-Baby-RE-Challenge/Thu, 23 Jan 2025 09:20:00 +0800challengehtbrevelflinuxBaby RE: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-Shuffleme-Challenge/https://x3ric.com/blog/posts/HackTheBox-Shuffleme-Challenge/Thu, 23 Jan 2025 09:20:00 +0800challengehtbrevelflinuxShuffleme: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-FlagCasino-Challenge/https://x3ric.com/blog/posts/HackTheBox-FlagCasino-Challenge/Thu, 12 Dec 2024 09:20:00 +0800challengehtbrevelflinuxFlagCasino: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-Hunting-License-Challenge/https://x3ric.com/blog/posts/HackTheBox-Hunting-License-Challenge/Thu, 12 Dec 2024 09:20:00 +0800challengehtbrevelfxorlinuxHunting License: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-Golfer-Challenge/https://x3ric.com/blog/posts/HackTheBox-Golfer-Challenge/Wed, 11 Dec 2024 09:20:00 +0800challengehtbrevelflinuxGolfer: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-QuickScan-Challenge/https://x3ric.com/blog/posts/HackTheBox-QuickScan-Challenge/Wed, 11 Dec 2024 09:20:00 +0800challengehtbrevelflinuxQuickScan: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-Simple-Encryptor-Challenge/https://x3ric.com/blog/posts/HackTheBox-Simple-Encryptor-Challenge/Sun, 20 Oct 2024 01:20:00 +0800challengehtbrevelfxorlinuxEnter the challenge flag to unlock this writeup.