Kelihos Loader IP Decrypter

void main()
{
    FILE *f = fopen("IPs.txt", "ab");

    for(int ip_offset = 0; ip_offset < sizeof(encrypted_block); ip_offset += 4)
    {
        BYTE encrypted_ip[4];

        for(int i = 0; i < 4; i++)
        {
            encrypted_ip[i] = (BYTE)(i-91) ^ encrypted_block[ip_offset+i];
        }

        char *ip_address = inet_ntoa(*(in_addr *)&encrypted_ip);
        fwrite(ip_address, strlen(ip_address), 1, f);
        fwrite("\r\n", 2, 1, f);
    }

    fclose(f);
}