Shellcode1_decoder.c

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

 unsigned char doshead[] = {
    0x54, 0x68, 0x69, 0x73, 0x20, 0x70,
    0x72, 0x6F, 0x67, 0x72, 0x61, 0x6D,
    0x20, 0x63, 0x61, 0x6E, 0x6E, 0x6F,
    0x74, 0x20, 0x62, 0x65, 0x20, 0x72,
    0x75, 0x6E, 0x20, 0x69, 0x6E, 0x20,
    0x44, 0x4F, 0x53, 0x20, 0x6D, 0x6F
    };
    //0x64, 0x65
unsigned char var_28[] = {
    0x12, 0x24, 0x28, 0x34, 0x5B, 0x23,
    0x26, 0x20, 0x35, 0x37, 0x4C, 0x28,
    0x76, 0x26, 0x33, 0x37, 0x3A, 0x27,
    0x3D, 0x6E, 0x25, 0x48, 0x6F, 0x3C,
    0x58, 0x3A, 0x68, 0x2C, 0x43, 0x73,
    0x10, 0x0E, 0x10, 0x6B, 0x10, 0x6F
    };

int main() {
   unsigned char * ptr1 = doshead;
   unsigned char * ptr2 = var_28;
   while (*ptr1 != 0) {
        uint8_t ascii = *ptr1 ^ *ptr2;
        printf("%c",ascii);
        ptr1++;
        ptr2++;
   }
   return 0;
}