新手一枚，如有错误（不足）请指正，谢谢！！ 题目网址：https://cgctf.nuptsast.com/challenges#Re 下载下文件，IDA载入，找到main函数，F5伪代码
双击进入，查看correct的存放了啥，经整理
对输入的字符串进行处理 接下来就是写脚本了，先将那15000的数据导出来， 然后shift+e导成一个txt文本文档
#include <stdio.h> int main() { char str[15000] ={}//这里的数据直接用txt文本文档里的粘贴，15000行太长了 char strings[] = {0xC4,0X34,0x22,0xB1,0xD3,0x11,0x97,0x7,0xDB,0x37,0xC4,0x6,0x1D,0xFC,0x5B,0xED,0x98,0xDF,0x94,0xD8,0xB3,0x84,0xCC,0x8,0}; int v0,i,result; char v3; for ( i = 14997; i >= 0; i -= 3 ) { v0 = str[i]; v3 = str[i + 2]; result = v0; switch ( v0 ) { case 1u: result = str[i + 1]; strings[(int)result] -= v3; break; case 2u: result = str[i + 1]; strings[(int)result] += v3; break; case 3u: result = str[i + 1]; strings[(int)result] ^= v3; break; case 4u: result = str[i + 1]; strings[(int)result] /= v3; break; case 5u: result = str[i + 1]; strings[(int)result] ^= strings[str[i + 2]]; break; default: continue; } } puts(strings); return 0; }运行脚本得到flag为nctf{Embr4ce_Vm_j0in_R3}
