Merge pull request #190 from Ratanshi/master

MAC Address Spoofer

Author: josharsh

MAC_Address_changer/MAC_Address_Changer.py

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+# MAC Address Changer in Python
+# The commands required to change the mac address from the terminal:
+# ifconfig eth0 down (To switch off the eth0 connection)
+# ifconfig eth0 hw ether "MAC ADDRESS ASSIGNED" (hw denotes Hardware)
+# ifconfig eth0 up (Switch the service back on)
+
+# A module called "subprocess" is used to execute linux(any) system commands depending on the OS.
+# We use a function of module subprocess called "call" that runs the system commands in the foreground
+# and waits for the command to finish before executing the next command
+# Syntax = subprocess.call("COMMAND",Shell=True)
+
+# SIOCSIFFLAGS->Operation not permitted : Run the command as Root
+# make sure to run the program as root
+
+# optparse helps in passing arguments by taking input from user
+# !/usr/bin/env python3    -> sha-bang
+import subprocess
+import optparse
+import re
+
+
+def get_arguments():
+	# parser object: knows everything about the arguments and parsing them ie entity that handles user input
+	# parser is a variable that holds optparse.OptionParser() class ie an instance is created
+	parser = optparse.OptionParser()
+	parser.add_option("-i", "--interface", dest="interface", help="Interface to change it's MAC address")
+	parser.add_option("-m", "--mac", dest="new_mac", help="New MAC address")
+	(option, arguments) = parser.parse_args()
+	if not option.interface:
+		parser.error("Please specify an interface and use --help for more information")
+	elif not option.new_mac:
+		parser.error("Please specify a new_mac and use --help for more information")
+	return option
+
+
+# options : value of input whose destination is given and arguments are for -i and -- interface etc.
+
+def change_mac(interface, new_mac):
+	print("# Changing the MAC Address of " + interface + "to" + new_mac)
+	subprocess.call(["ifconfig", interface, "down"])
+	subprocess.call(["ifconfig", interface, "hw ether", new_mac])
+	subprocess.call(["ifconfig", interface, "up"])
+
+
+def get_current_mac(interface):
+	ifconfig_result = subprocess.check_output(["ifconfig", interface])
+	print(ifconfig_result)
+
+	# Extracting MAC Address using REGEX
+	mac_address_search_result = re.search(r"\w\w:\w\w:\w\w:\w\w:\w\w:\w\w", ifconfig_result)
+	if mac_address_search_result:
+		return mac_address_search_result.group(0)
+	else:
+		print("Couldn't read MAC address")
+
+
+# subprocess.call("ifconfig "+interface+" down", shell=True) is not safe as interface allows
+# any command to be given by the user which makes the tool vulnerable like enter 2 commands
+# (using ; that marks end of command) , Hence we use the second syntax of Subprocess
+
+options = get_arguments()
+current_mac = get_current_mac(options.interface)
+print("Current MAC = " + str(current_mac))
+change_mac(options.interface, options.new_mac)
+
+current_mac = get_current_mac(options.interface)
+if current_mac == options.new_mac:
+	print("MAC Address was successfully changed to " + current_mac)
+else:
+	print("MAC Address did not change")

MAC_Address_changer/README.md

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+# MAC_Address-Changer
+MAC Address Changer allows you to change (spoof) Media Access Control (MAC) Address of your Network Interface Card (NIC) instantly. It has a very simple user interface and provides ample information regarding each NIC in the machine. Every NIC has a MAC address hard coded in its circuit by the manufacturer. This hard coded MAC address is used by drivers to access Ethernet Network (LAN). This tool can set a new MAC address to your NIC, bypassing the original hard coded MAC address.

MAC_Address_changer/newread

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