ARM-X installation instructions - tested on Kali Linux

Contributed by @zh4ck

ARMX-ON-KALI

TL;DR:

A quick installation guide to setting up ARM-X on Kali Linux. Thanks to Z. Balasz for his efforts in testing and writing these notes.

1. Set up some pre-requisites

sudo apt install -y qemu dialog bridge-utils uml-utilities nfs-kernel-server gdb-multiarch

sudo sh -c 'echo "\n\n/armx   192.168.100.0/24(rw,sync,no_root_squash,no_subtree_check)\n" >> /etc/exports'
sudo systemctl enable nfs-kernel-server

2. Clone ARM-X

git clone https://github.com/therealsaumil/armx
cd armx/hostfs
unzip hostfs.ext2.zip
cd ..

3. Create bridge interface

sudo sh -c 'echo "auto br0\niface br0 inet dhcp\npre-up brctl addbr br0\npost-down brctl delbr br0" > /etc/network/interfaces.d/br0'
sudo etc/local.d/10-tun-network.start
sudo networking restart

4. TODO check /etc/local.d exists and executes on Kali

sudo sh -c 'cat etc/local.d/10-tun-network.start >> /etc/rc.local'
sudo cp usr/local/bin/restart-taps /usr/local/bin/restart-taps
cp home/kali/.ssh/id_rsa.armx* /home/kali/.ssh/

wget -O ~/.gdbinit-gef.py -q http://gef.blah.cat/py
echo source ~/.gdbinit-gef.py >> ~/.gdbinit

cd ..
sudo mv armx/ /
sudo chown -R kali /armx
export PATH=$PATH:/armx/run # It is best to add your shell profile this path

5. Create your first test device

You can extract the following files from Damn Vulnerable Arm Router: https://app.box.com/s/g2k7vo45ctn5lh0enrwg6i83abwindte

mkdir -p /armx/DVAR/kernel 
cp zImage-3.16.57-vexpress /armx/DVAR/kernel/
cp config /armx/DVAR/
cp rootfs /armx/DVAR/

6. Start the ARM-X framework

Run:

launcher

Choose Damn Vulnerable Arm Router. Once it boots:

ssh -i /home/kali/.ssh/id_rsa.armx root@192.168.100.2 
Choose option 1 - this will start the init scripts

7. Make armxgdb Kali compatible

By default, armxgdb uses arm-linux-gnueabi-gdb. On Kali, it is gdb-multiarch and add the following line to the end of armxgdb:

-ex="set architecture arm"