282 lines
7.6 KiB
Bash
282 lines
7.6 KiB
Bash
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#!/bin/bash
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#
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# Simple vm-specific management bash functions and aliases.
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# Coming with basic functionality of starting, stopping and status checking
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# routines. Easy to change to manage other type of VMs.
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#
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# Providing commands for:
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# - starting/stopping selected VM
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# - checking whether selected VM is running
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# - easily ssh'ing to the selected VM
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# - scanning for other VMs
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# - setting selected VM's IP address within /etc/hosts (and alike) file
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#
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# Mariusz B. / mgeeky, '16-'19
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# v0.7
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#
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# VM_NAME as defined in VirtualBox. Name must not contain any special characters, not
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# even space.
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VM_NAME=kali
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# User's name to be used during ssh.
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VM_USER=root
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# Host-only's interface network address and interface
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HOST_ONLY_NET=192.168.56.1
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HOST_ONLY_IFACE=vboxnet0
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# Hosts file where to put the VM's host IP address
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HOSTS_FILE=/etc/hosts
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# Command to be run to detect proper VM and pattern to be matched then.
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VM_DETECT_COMMAND="uname -a"
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VM_DETECT_PATTERN="Linux Kali"
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# Initial commands one would like to get executed upon VM start.
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VM_INIT_COMMANDS="dhclient -r eth1 ; dhclient -v eth1"
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#
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# Will set the following aliases:
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# - ssh<vm> alias for quick ssh-connection
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# - get<vm> alias for quick vm's ip resolution
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# - start<vm> alias for starting up particular vm
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# - stop<vm> alias for stopping particular vm
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# - is<vm> alias for checking whether the vm is running.
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#
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# For instance, when VM_NAME=Kali - the following aliases will be defined:
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# sshkali, getkali, and so on
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#
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function setup_aliases() {
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name=$VM_NAME
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if [ -z $name ]; then
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echo "[!] You must set the VM_NAME variable within that script first!"
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exit 1
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fi
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alias ssh$name="ssh -o StrictHostKeyChecking=no -Y $VM_USER@$name"
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alias get$name="cat $HOSTS_FILE | grep -i $name | cut -d' ' -f1"
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alias start$name="startvm"
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alias stop$name="stopvm"
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alias is$name="VBoxManage list runningvms | grep -qi $name && echo '[+] Running' || echo '[-] Not running';"
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}
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#
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# Function for starting particular VM and then detecting it within
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# user-specified host-only network, in order to setup correct entry in hosts file.
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# Afterwards some additional actions like sshfs mounting could be deployed.
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#
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function startvm() {
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if [ -n "$1" ] && [[ "$1" == "-h" ]]; then
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echo "[?] Usage: startvm [mode] - where [mode] is: headless (default) or gui"
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return
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fi
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name=$VM_NAME
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#hostname=${name,,}
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hostname=$name
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mode=$1
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if [[ "$mode" == "" ]]; then
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mode='headless'
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elif [[ "$mode" == "gui" ]]; then
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mode='gui'
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else
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echo "[?] Usage: startvm [mode] - where [mode] is: headless (default) or gui"
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return
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fi
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echo "[>] Launching $name in $mode"
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if [[ $(VBoxManage list runningvms | grep -i $name) ]]; then
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echo "[+] Already running..."
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else
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echo "[>] Awaiting for machine to get up..."
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VBoxManage startvm $name --type $mode
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if [ $? -ne 0 ]; then
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echo "[!] Could not get $name started. Bailing out."
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exit 1
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fi
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found=0
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sleep 16
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for i in `seq 1 25`;
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do
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if [ $found -ne 0 ]; then
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break
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fi
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echo -e "\t$i. Attempting to connect with $name..."
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sleep 3
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if scan_for_vm; then
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found=1
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break
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fi
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done
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if [ $found -ne 1 ]; then
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echo "[!] Critical - could not locate $name VM machine on network."
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echo -e "\tYou can always try 'scan_for_vm' command to do a sweep again and retry process."
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return
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fi
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echo "[+] Succeeded. $name found in network."
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fi
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}
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#
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# Function for stopping particular VM.
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#
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function stopvm() {
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name=$VM_NAME
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hostname=$name
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if VBoxManage list runningvms | grep -qi $name
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then
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sleep 2
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sudo sed -i "/$hostname/d" $HOSTS_FILE
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echo "[+] Stopping $VM_NAME..."
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VBoxManage controlvm $name savestate
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else
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echo "[-] Not running."
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return
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fi
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sleep 3
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if VBoxManage list runningvms | grep -qi $name
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then
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echo "[?] Seems that $name do not want to be pasued..."
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sleep 2
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VBoxManage controlvm $name acpipowerbutton
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if VBoxManage list runningvms | grep -qi $name
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then
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echo "[-] Could not pause $name politely. Cut his head!"
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sleep 3
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VBoxManage controlvm $name poweroff
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else
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echo "[+] Ok, it had shut itself down."
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fi
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fi
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}
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#
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# One can use that very function to enumerate available machines
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# visible from VMs network interface (under ARP scanning).
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#
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function find_vms_netdiscover {
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sudo netdiscover -i $HOST_ONLY_IFACE -r $HOST_ONLY_NET/24 -N -P | grep ${HOST_ONLY_NET:0:5} | cut -d' ' -f2 | tail -n +2
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}
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function find_vms_nmap {
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nmap -sn $HOST_ONLY_NET/24 -oG - | grep Up | awk '{print $2}'
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}
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function find_vms {
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sudo ifconfig $HOST_ONLY_IFACE up
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out=""
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if [ -x "$(command -v nmap)" ]; then
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out=$(find_vms_nmap)
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if test "$out" != ""; then
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echo "$out"
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return
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fi
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fi
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if [ -x "$(command -v netdiscover)" ]; then
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out=$(find_vms_netdiscover)
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if test "$out" != ""; then
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echo "$out"
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return
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fi
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fi
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echo ""
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}
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function detect_vm {
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out=$(timeout 30s ssh -o BatchMode=yes -o StrictHostKeyChecking=no -o ConnectTimeout=5 $VM_USER@$1 "$VM_DETECT_COMMAND" 2>/dev/null )
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if [ $? -eq 124 ] || [ $? -eq 255 ]; then
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echo "[!] Machine $1 timed out while trying to detect it by ssh probing."
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return 1
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fi
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if echo "$out" | grep -qi "$VM_DETECT_PATTERN" ; then
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return 0
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else
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return 1
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fi
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}
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#
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# If for some reason `start` command didn't manage to find the VM
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# that was starting at that moment, one can repeat the scan & set process
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# manually using the below command.
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#
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function scan_for_vm {
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# Scanning hosts in host-only network made by VirtualBox and then every
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# found host will be ssh'd to get it's uname and determine whether it is our vm.
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# Thanks to this loop we will not be failing to connect to our VM in case it's
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# IP would get assigned differently from VBox dhcp.
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hosts=$(find_vms)
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declare -a hostsarray
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while read -r host
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do
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hostsarray+=($host)
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done <<< "$hosts"
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sorted_hostsarray=($(echo "${hostsarray[@]}" | tr ' ' '\n' | sort -u))
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for host in $sorted_hostsarray[@]; do
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echo "[.] Testing: $host"
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detect_vm $host
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if [ $? -eq 0 ]
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then
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# VM found by match in uname's output.
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echo "[+] Found VM by ssh probing: $host"
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if [ -n "$VM_INIT_COMMANDS" ]; then
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echo "[+] Running VM init commands..."
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timeout 1m ssh -o BatchMode=yes -o StrictHostKeyChecking=no -o ConnectTimeout=5 $VM_USER@$host "$VM_INIT_COMMANDS" 2>/dev/null
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if [ $? -eq 124 ]; then
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echo "[?] Timed out while trying to run VM_INIT_COMMANDS."
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#return 1
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echo "Continuing anyway..."
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fi
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detect_vm $host
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if [ $? -ne 0 ]; then
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if [ $# -eq 1 ] && [ "$1" == "again" ] ; then
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echo "[!] After initial commands the connection with VM is lost. Repeat the 'scan_for_vm' process"
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return 1
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else
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scan_for_vm "again"
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fi
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fi
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fi
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# Since the shell does output redirection not sudo, we have to write
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# to the hosts file like so:
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#
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cat $HOSTS_FILE | grep -qi $VM_NAME
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if [ $? -eq 0 ] && [ "$1" != "again" ]; then
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sudo sed -i -E "s/^[0-9]{1,3}.[0-9]{1,3}+.[0-9]{1,3}+.[0-9]{1,3}+\s+$VM_NAME/$host $VM_NAME/" $HOSTS_FILE
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echo "[+] Updated /etc/hosts file with '$host $VM_NAME' entry."
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else
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echo "$host $hostname" | sudo tee --append $HOSTS_FILE > /dev/null
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fi
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return 0
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else
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#echo "[.] Not our target VM: '$host'"
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continue
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fi
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done
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echo "[!] Could not locate $VM_NAME machine within the network."
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return 1
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}
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setup_aliases
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