reverse engineering doesn't have to be hard
Source: YouTube · John Hammond · published Oct 2, 2025 · 24:44
Reverse engineering the "Go Crack Me 1" challenge from Huntress CTF 2024 reveals a hidden flag through XOR decryption with hex 56 and demonstrates multiple analysis approaches 0:50.
Key Takeaways:
• The Golang binary contains debug symbols, making reverse engineering easier as variable and function names remain visible 0:50.
• By default, the program outputs "access denied," indicating a conditional check that determines whether the flag is displayed 10:40.
• The flag is encrypted with a simple XOR operation using hex value 56, which can be reversed using static analysis, online tools, or custom code 13:01.
IDA Pro provides comprehensive reverse engineering capabilities including disassembly, decompilation, debugging, and patching for both CTF challenges and real-world security analysis.
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Transcript Preview
First 800 characters of the transcript
Reverse engineering is an extremely valuable skill in your cyber security career, whether or not you are or want to become a malware analyst, an exploit developer, or a vulnerability researcher. So, in this video, I want to walk through some beginnerfriendly and introductory reverse engineering with a challenge titled Go Crack Me 1. This Gor Crackme 1 challenge was the first in a set of three different Golang reverse engineering exercises from last year's Huntress CTF 2024. And by the way, the Huntress Capture the Flag is happening again for 2025 running from the entire month of October starting October 1st through October 31st. You can register anytime, you can play anytime. It's all at your leisure. It's a ton of fun. I hope to see you there. Now, for this challenge, we're given a gok1.z…