https://x3ric.com/blog/tags/xor/CTF notes, systems work, and writeups.Hugoen-usSat, 06 Jun 2026 21:41:13 +0200https://x3ric.com/blog/posts/HackTheBox-LicenseGenerator/https://x3ric.com/blog/posts/HackTheBox-LicenseGenerator/Fri, 27 Jun 2025 01:20:00 +0800challengehtbrevxorlinuxLicenseGenerator: recover the XOR transform from the binary and invert it to reveal the flag.https://x3ric.com/blog/posts/HackTheBox-SatelliteHijack/https://x3ric.com/blog/posts/HackTheBox-SatelliteHijack/Fri, 27 Jun 2025 01:20:00 +0800challengehtbrevgdbxorlinuxSatelliteHijack: trace the binary, isolate the validation routine, and invert it to recover the flag.https://x3ric.com/blog/posts/HackTheBox-BinCrypt-Breaker-Challenge/https://x3ric.com/blog/posts/HackTheBox-BinCrypt-Breaker-Challenge/Sun, 16 Feb 2025 00:20:00 +0800challengehtbrevxorlinuxEnter the challenge flag to unlock this writeup.https://x3ric.com/blog/posts/HackTheBox-Whole-Lotta-Candy-Challenge/https://x3ric.com/blog/posts/HackTheBox-Whole-Lotta-Candy-Challenge/Fri, 31 Jan 2025 09:20:00 +0800challengehtbcryptoaesxorWhole Lotta Candy: abuse the AES misuse, derive the missing key material, and decrypt the flag.https://x3ric.com/blog/posts/HackTheBox-ReRop-Challenge/https://x3ric.com/blog/posts/HackTheBox-ReRop-Challenge/Thu, 30 Jan 2025 00:20:00 +0800challengehtbrevxorlinuxEnter the challenge flag to unlock this writeup.https://x3ric.com/blog/posts/HackTheBox-Baby-Crypt-Challenge/https://x3ric.com/blog/posts/HackTheBox-Baby-Crypt-Challenge/Thu, 23 Jan 2025 09:20:00 +0800challengehtbrevxorlinuxBaby Crypt: recover the XOR transform from the binary and invert it to reveal the flag.https://x3ric.com/blog/posts/HackTheBox-Impossible-Password-Challenge/https://x3ric.com/blog/posts/HackTheBox-Impossible-Password-Challenge/Thu, 23 Jan 2025 09:20:00 +0800challengehtbrevxorlinuxImpossible Password: recover the XOR transform from the binary and invert it to reveal the flag.https://x3ric.com/blog/posts/HackTheBox-LunaCrypt-Challenge/https://x3ric.com/blog/posts/HackTheBox-LunaCrypt-Challenge/Thu, 23 Jan 2025 09:20:00 +0800challengehtbcryptoxorLunaCrypt: derive the XOR key stream, invert the transform, and recover the flag.https://x3ric.com/blog/posts/HackTheBox-I-know-Mag1k-Challenge/https://x3ric.com/blog/posts/HackTheBox-I-know-Mag1k-Challenge/Wed, 22 Jan 2025 09:20:00 +0800challengehtbcryptoxorI know Mag1k: derive the XOR key stream, invert the transform, and recover the flag.https://x3ric.com/blog/posts/HackTheBox-Broken-Decryptor-Challenge/https://x3ric.com/blog/posts/HackTheBox-Broken-Decryptor-Challenge/Fri, 13 Dec 2024 09:20:00 +0800challengehtbcryptoxorprngEnter the challenge flag to unlock this writeup.https://x3ric.com/blog/posts/HackTheBox-The-Last-Dance-Challenge/https://x3ric.com/blog/posts/HackTheBox-The-Last-Dance-Challenge/Fri, 13 Dec 2024 09:20:00 +0800challengehtbcryptoxoreccEnter the challenge flag to unlock this writeup.https://x3ric.com/blog/posts/HackTheBox-XorXorXor-Challenge/https://x3ric.com/blog/posts/HackTheBox-XorXorXor-Challenge/Fri, 13 Dec 2024 09:20:00 +0800challengehtbcryptoaesxorEnter the challenge flag to unlock this writeup.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-Potion-Master-Challenge/https://x3ric.com/blog/posts/HackTheBox-Potion-Master-Challenge/Wed, 11 Dec 2024 09:20:00 +0800challengehtbrevxorlinuxPotion Master: recover the XOR transform from the binary and invert it to reveal the flag.https://x3ric.com/blog/posts/HackTheBox-Inizialization-Challenge/https://x3ric.com/blog/posts/HackTheBox-Inizialization-Challenge/Sat, 16 Nov 2024 09:20:00 +0800challengehtbcryptoaesxorInizialization: abuse the AES misuse, derive the missing key material, and decrypt the flag.https://x3ric.com/blog/posts/HackTheBox-Secure-Singning-Challenge/https://x3ric.com/blog/posts/HackTheBox-Secure-Singning-Challenge/Fri, 01 Nov 2024 09:20:00 +0800challengehtbcryptoxorhashSecure Singning: derive the XOR key stream, invert the transform, and 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.https://x3ric.com/blog/posts/TryHackMe-Flip-Challenge/https://x3ric.com/blog/posts/TryHackMe-Flip-Challenge/Thu, 03 Oct 2024 09:20:00 +0800challengethmcryptoaesxorFlip: abuse the AES misuse, derive the missing key material, and decrypt the flag.