Ducky Mimie

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
(new-object System.Net.WebClient).DownloadFile('https://file1.closermag.fr/var/closermag/storage/images/1/2/5/7/0/12570970/mais-oui-mimie-mathy-est-plus-badass-que-les-men.jpg',"$Env:Temp\\b.jpg");
Add-Type @"
using System;
using System.Runtime.InteropServices;
using Microsoft.Win32;
namespace Wallpaper {
    public enum Style : int {
        Tile, Center, Stretch, NoChange
    }
    public class Setter {
        public const int SetDesktopWallpaper = 20;
        public const int UpdateIniFile = 0x01;
        public const int SendWinIniChange = 0x02;
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern int SystemParametersInfo(int uAction, int uParam, string lpvParam, int fuWinIni);
        public static void SetWallpaper(string path, Wallpaper.Style style) {
            SystemParametersInfo(SetDesktopWallpaper, 0, path, UpdateIniFile | SendWinIniChange);
            RegistryKey key = Registry.CurrentUser.OpenSubKey("Control Panel\\\\Desktop", true);
            switch (style) {
                case Style.Stretch:
                    key.SetValue(@"WallpaperStyle", "2");
                    key.SetValue(@"TileWallpaper", "0");
                    break;
                case Style.Center:
                    key.SetValue(@"WallpaperStyle", "1");
                    key.SetValue(@"TileWallpaper", "0");
                    break;
                case Style.Tile:
                    key.SetValue(@"WallpaperStyle", "1");
                    key.SetValue(@"TileWallpaper", "1");
                    break;
                case Style.NoChange:
                    break;
            }
            key.Close();
        }
    }
}
"@
[Wallpaper.Setter]::SetWallpaper("$Env:Temp\b.jpg" , 2 )