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Akshat0404/MAC_CHANGER

This tool has to be used on linux kernel.

Steps to use the tool:

1. git clone https://github.com/Akshat0404/MAC_CHANGER.git
   

2. Now open the MAC_CHANGER file.

3. ./MAC_CHANGER
   

4. Now look for a python file named mac_changer.py in MAC_CHANGER directory using ls command.

5. Now run the mac_changer.py using the command;

    python3 mac_changer.py -h
    
    python3 mac_changer.py --help
   

6. The -h or --help will list out the following arguments that can be used using this tool:

    Usage: mac_changer.py [options]
   
       Options:
   
       -h, --help            show this help message and exit
   
       -n NETWORK_INTERFACE, --network_interface=NETWORK_INTERFACE
                              Name of the network interface of which the MAC address
                              has to be changed
   
       -c NEW_MAC, --new_mac=NEW_MAC
                             New MAC address
   

7. Now in the next few commands, we will see how this tool works.

8. Here we use -n or --network_interface to specify the network interface to which we wanna change the MAC address.

   -c or --new_mac is used to specify the new mac address.

   Below is a demo command;

    python3 mac_changer.py -n eth0 -c 00:a4:45:56:f2:6b;
   

9. By running this command the mac address of the network interface eth0 changes to the mac address we want i.e. 00:a4:45:56:f2:6b and the following message will appear after the successful execution of the command;

    [+] MAC address of eth0 has been changed to 00:a4:45:56:f2:6b.
   

   The same implies for the network interface wlan0.

10. Now if we run the ifconfig command, we can see that the MAC address has been changed to 00:a4:45:56:f2:6b;

    ifconfig

        eth0: flags=xxxx<UP,BROADCAST,RUNNING,MULTICAST>  mtu xxxx
    
            inet xx.x.x.xx  netmask xxx.xxx.xxx.x  broadcast xx.x.x.xxx
    
            ether 00:a4:45:56:f2:6b  txqueuelen xxxx  (Ethernet)
    
            RX packets xx  bytes 46960 (45.8 KiB)
    
            RX errors 0  dropped 0  overruns 0  frame 0
    
            TX packets xx  bytes 10412 (10.1 KiB)
    
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    
    
        lo: flags=xx<UP,LOOPBACK,RUNNING>  mtu xxxxx
    
            inet xxx.x.x.x  netmask xxx.x.x.x
    
            inet6 ::x  prefixlen xxx  scopeid 0x10<host>
    
            loop  txqueuelen xxxx  (Local Loopback)
    
            RX packets x  bytes 400 (400.0 B)
    
            RX errors 0  dropped 0  overruns 0  frame 0
    
            TX packets 8  bytes 400 (400.0 B)
    
            TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    

11. We all know that lo network interface doesn't need a MAC address;

     python3 mac_changer.py -n lo -c 00:11:22:33:44:55
    

    So if we mention in the network interface argument, the following error appears

     Usage: mac_changer.py [options]
    
     mac_changer.py: error: [-] This network interface does not have MAC address
    

12. We know that wlan0, lo and eth0 are the valid network interfaces among which only wlan0 and eth0 need a MAC address. So, if any other interface is mentioned other than wlan0 and eth0, the following error message shows up;

     python3 mac_changer.py -n wlan -c 00:00:00:00:00:00
    

    In the above command I have specified wlan as network interface, which is not valid, lets see what the tool does after this command.

    Usage: mac_changer.py [options]
    
    mac_changer.py: error: [-] wlan is not a valid network interface. Please specify a valid network interface.
    

13. We also know that MAC address is of the format xx:xx:xx:xx:xx:xx, where x is any number from 0-9, lower case alphabet from a-f or upper case alphabet from A-F.

    python3 mac_changer.py -n eth0 -c 00:29:4r:5h:Z2 
    

    As you can see the format of MAC address in the above command is wrong.

    So, if the incorrect format of MAC address is specified, an error message would show up;

    Usage: mac_changer.py [options]
    
    mac_changer.py: error: [-] You have specified an incorrect format for MAC address. Please Enter the MAC address in the format xx:xx:xx:xx:xx:xx, where x is lower case alphabets from a-f or upper case alphabets from A-F or numbers from 0-9.
    

I hope that this tool helps you.