[HITCON 2022]gocrygo
| ID： | 13986 |
|---|---|
| 标题： | [HITCON 2022]gocrygo |
| 描述： | Note: The flag provided in the directory is HITCON{...}. Please submit the flag in hitcon{...}. There are three files in this challenge: 1. gocrygo: A crypto-ransomware. 2. gocrygo_victim_directory: The directory fucked up by this ransomware. 3. core: The ransomware's core dump when infecting gocrygo_victim_directory. Unfortunately, no decryption service is available :( Your goal is to: 1. Reverse gocrygo 2. Figure out the encryption algorithm it uses 3. Find the encryption key in the core dump 4. Decrypt the entire infected directory. 5. Find the flag in gocrygo_victim_directory. Note: The encryption algorithm is a common cryptographic algorithm (I'm too dumb to implement one myself). In other words, please don't waste your time figuring out the details of the algorithm. Once you know which algorithm it uses, you can move on to the next phase and try to excavate the encryption key from the core. 该题flag未知，得出flag后请与管理员联系 |
| 类型： | REVERSE |
| 网站： | NSSCTF |
| 题目链接： | https://www.nssctf.cn/problem/3208 |
| 赛事： | HITCON |
| 年度： | 2022 |
| Flag值： | 无 |
| writeup： | https://github.com/ispoleet/ctf-writeups/blob/master/hitcon_ctf_2022/gocrygo/gocrygo-ea6cb09b28eb26c415f74493bf651609149483c5.tar.gz |