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Ultimate Network Stealther that makes Linux a Ghost In The Net and protects from MITM/DOS/scan - GhostInTheNet

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Ultimate Network Stealther that makes Linux a Ghost In The Net and protects from MITM/DOS/scan.

Properties:

Network Invisibility
Network Anonymity
Protects from MITM/DOS
Transparent
Cross-platform
Minimalistic

Dependencies:

Linux 2.4.26+ - will work on any Linux-based OS, including Whonix and RaspberryPI

BASH - the whole script
root privileges - for kernel controlling

Limitations:

You can still be found with VLAN logs if using ethernet or by triangulation/broadcast if using WiFi
MAC spoofing won't work if appropriate mitigations has been taken, like DAI or sticky MAC
Might be buggy with some CISCO switches
Not suitable for production servers

How it works
The basic and primary network protocol is ARP for IPv4 and NDP (ICMPv6) for IPv6, located in the link and network layer, provides main connectivity in a LAN.
Despite its utility and simplicity, it has numerous vulnerabilities that can lead to a MITM attack and leak of confidentiality.
Patching of such a widely used standard is a practically impossible task.
A very simple, but at the same time effective solution is to disable ARP and NDP responses on an interface and be very cautious with broadcasting.
Considering the varieties of implementations, this means that anyone in the network wouldn't be able to communication with such host, only if the host is willing it-self.
The ARP/NDP cache will be erased quickly afterwards.
Here is an example schema:

A >>> I need MAC address of B >>> B

A <<< Here it is <<< B

A <<< I need MAC address of A <<< B

A >>> I'm not giving it >>> B

To increase privacy, it's advised to spoof the MAC address, which will provide a better concealment.
All this is possible using simple commands in Linux kernel and a script that automates it all.

Analysis
No ARP/NDP means no connectivity, so an absolute stealth and obscurity on the network/link layer.
This protects from all possible DOSes and MITMs (ARP, DNS, DHCP, ICMP, Port Stealing) and far less resource consuming like ArpON.
Such mitigation implies impossibility of being scanned (nmap, arping).
Besides, it doesn't impact a normal internet or LAN connection on the host perspective.
If you're connecting to a host, it will be authorised to do so, but shortly after stopping the communication, the host will forget about you because, ARP/NDP tables won't stay long without a fresh request.
Regarding the large compatibility and cross-platforming, it's very useful for offsec/pentest/redteaming as well.
You see everyone, but nobody sees you, you're a ghost.
Mitigation and having real supervision on the network will require deep reconfiguration of OSes, IDPSes and all other equipement, so hardly feasible.

HowTo
You can execute the script after the connection to the network or just before:

sudo GhostInTheNet.sh on eth0

This will activate the solution until reboot.
If you want to stop it:

sudo GhostInTheNet.sh off eth0

Of course, you will have to make the script executable in the first place:

chmod u+x GhostInTheNet.sh

Notes
ARP/NDP protocol can be exploited for defensive purpose.
Now your Poisontap is literally undetectable and your Tails is even more anonymous.
You should learn some stuff about IPv6.

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anti-ARP-spoofing application software and uses active scanning method to detect any ARP-spoofing incidents - shARP

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ARP spoofing allows an attacker to intercept data frames on a network, modify the traffic, or stop all traffic. Often the attack is used as an opening for other attacks, such as denial of service, man in the middle, or session hijacking attacks.Our anti- ARP spoofing program, (shARP) detects the presence of a third party in a private network actively. It has 2 mode: defensive and offensive. Defensive mode protects the end user from the spoofer by dissconnecting the user's system from the network and alerts the user by an audio message. The offensive mode dissconnects the user's system from the network and further kicks out the attacker by sending de-authentication packets to his system, unabling him to reconnect to the network until the program is manually reset. The program creates a log file (/usr/shARP/)containing the details of the attack such as, the attackers mac address, mac vendor time and date of the attack. We can identify the NIC of the attackers system with the help of the obtained mac address. If required the attacker can be permanently banned from the netwrk by feeding his mac address to the block list of the router. The whole program is designed specially for linux and is writen in Linux s is hell command (bash command). In the offensive mode the program downloads an open-source application from the internet with the permission of the user namely aircrack-ng (if not present in the user's system already ). Since it is written in python language, you must have python installed on your system for it to work. Visit https://www.aircrack-ng.org for more info.

If the user wants to secure his network by scanning for any attacker he can run the program. the program offers a simple command line interface which makes it easy for the new users.the user can directly access the defensive or offensive mode by inputing the respective command line arguments along with the execution code just as in any other linux command to operate a software through CLI. In case the user inputs any wrong command line argument, the program prompts the user to use the help option. the help option provides the details about the two modes. when the user runs the program in defensive mode, he recieves the original mac address of the gateway. If there is no man in the middle attack, the screen stays idle. As soon as the program detects a spoofer in the network, it outputs the mac address of the spoofer and the time of the attack. It then dissconnects the users's system from the network so as to protect the private data being transfered between the system and the server. It also saves a log file about the attacker for further use. when the user runs the program in offensive mode,he recieves the original mac address of the gateway. If there is no man in the middle attack, the screen stays idle. As soon as the program detects a spoofer in the network, it outputs the mac address of the spoofer and the time of the attack as in the defensive mode. But further, the program puts the user's Network Interface Card to monitor mode with the help of the application 'Airmon-ng'. Then the application 'Aircrack-ng' gets activated and starts sending deauthentication packets to the attacker's system. This process kicks out the attacker from the network. The program also creates a log file about the attack.

How to use

bash ./shARP.sh -r [interface] to reset the network card and driver.  
bash ./shARP.sh -d [interface] to activate the program in defense mode.  
bash ./shARP.sh -o [interface] to activate the program in offense mode.  
bash ./shARP.sh -h             for help.

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Kick Devices Off Your Network - KickThemOut

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Windows Tool For Spoofing The Mac Address - WinMACSpoofer

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A simple Python CLI to Spoof Emails - SimpleEmailSpoofer

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