Warning

This module cannot be removed from kernel by command rmmod yet. So please create a virtual machine snapshot before using it.

Porting

porting the module to higher version of Linux kernel, tested on Ubuntu 18.04, Linux kernel 5.0

Porting to kernel v4.15

Need to change /usr/src/linux-headers-4.15.0-91-generic/include/linux/fs.h

Remove the const before dir_context actor.

Sample Rootkit for Linux

About

This is sample rootkit implementation for Linux. It is able to hide processes, files and grants root privileges. It also have stealth mode (enabled by default) that prevents it from detecting.

Usage

Just compile module (included Makefile does this against current kernel) and load it. There will be hidden file in /proc called rootkit. It's not visible when listing content of proc directory.

Just cat /proc/rootkit to see available commands. You can use attached program to give orders or use echo -n (don't forget -n, there should be no tailing new line).

Examples: echo -n thf >> /proc/rootkit

./rtcmd.py hp1337

To gain root you should give "getroot" command (popculture reference, without spaces, small letters) and then fork some shell from writing process. rtcmd.py does that for you if second parameter is specified. tools/rtcmd.py getroot /bin/bash

Notes

This code should run on Linux version 2.6.29 and higher, since before that lookup_address symbol wasn't exported. Were tested against 3.1.0, 3.1.5 and 3.1.6 and is fully working (both x86 and x86_64).

Paper describing details of implementation (in polish) is available.