Module: Dorothy

Defined in:
lib/dorothy2/BFM.rb,
lib/dorothy2.rb,
lib/dorothy2/MAM.rb,
lib/dorothy2/vtotal.rb,
lib/dorothy2/do-init.rb,
lib/dorothy2/Settings.rb,
lib/dorothy2/do-utils.rb,
lib/dorothy2/do-logger.rb

Overview

Copyright © 2010-2013 marco riccardi. This file is part of Dorothy - www.honeynet.it/dorothy See the file ‘LICENSE’ for copying permission.

Defined Under Namespace

Modules: DoroConfig, DoroSettings, Ssh, Util Classes: DoroLogger, Doro_NAM, Doro_VSM, DorothyFetcher, Insertdb, Loadmalw, Vtotal

Instance Method Summary collapse

Instance Method Details

#analyze(bin, guestvm) ⇒ Object

ANALYZE THE SOURCE



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# File 'lib/dorothy2.rb', line 74

def analyze(bin, guestvm)

  #RESERVING AN ANALYSIS ID
  db = Insertdb.new
  anal_id = db.get_anal_id



  #source.each do |sname, sinfo|

  #Dir.chdir(sinfo[:dir])

  #set home vars
  sample_home = DoroSettings.env[:analysis_dir] + "/#{anal_id}"
  bin.dir_bin = "#{sample_home}/bin/"
  bin.dir_pcap = "#{sample_home}/pcap/"
  bin.dir_screens = "#{sample_home}/screens/"
  bin.dir_downloads = "#{sample_home}/downloads/"


  LOGGER.info "SANDBOX", "VM#{guestvm[0]} ".yellow + "[" + "#{anal_id}".red + "]" + " Analyzing binary #{bin.filename}"

  begin
    #crate dir structure in analisys home
    unless File.directory?(sample_home)
      LOGGER.info "VSM","VM#{guestvm[0]} ".yellow + "Creating DIRS"
      Dir.mkdir sample_home
      Dir.mkdir bin.dir_bin
      Dir.mkdir bin.dir_pcap
      Dir.mkdir bin.dir_screens
      Dir.mkdir bin.dir_downloads

      if VERBOSE
        LOGGER.debug "VSM", sample_home
        LOGGER.debug "VSM",bin.dir_bin
        LOGGER.debug "VSM",bin.dir_pcap
        LOGGER.debug "VSM",bin.dir_screens
      end

    else
      LOGGER.warn "SANDBOX","Malware #{bin.md5} sample_home already present, WTF!? Skipping.."
      #print "\n"
      return false
    end



    FileUtils.cp(bin.binpath,bin.dir_bin)  # mv?


    #Creating a new VSM object for managing the SandBox VM
    LOGGER.info "VSM","VM#{guestvm[0]} ".yellow + "Connecting to ESX Server #{DoroSettings.esx[:host]}"

    vsm = Doro_VSM::ESX.new(DoroSettings.esx[:host],DoroSettings.esx[:user],DoroSettings.esx[:pass],guestvm[1], guestvm[3], guestvm[4])

    #Copy File to VM
    r = 0

    begin
      vsm.check_internet
    rescue
      if r <= 2
        r = r+1
        LOGGER.warn "SANDBOX","VM#{guestvm[0]}".yellow + " GUESTOS Connection problem to Internet, retry n. #{r}/3"
        sleep 20
        retry
      end
      LOGGER.error "SANDBOX", "VM#{guestvm[0]}".yellow + " Guest system is not able to connect to internet"
      r = 0
      retry
    end



    LOGGER.info "VSM","VM#{guestvm[0]} ".yellow + "Copying #{bin.md5} to VM"

    filecontent = File.open(bin.binpath, "rb") { |byte| byte.read } #load filebinary
    vsm.copy_file("#{bin.md5}#{bin.extension}",filecontent)

    #Start Sniffer
    dumpname = bin.md5
    pid = @nam.start_sniffer(guestvm[2],DoroSettings.nam[:interface], dumpname, DoroSettings.nam[:pcaphome]) #dumpname = vmfile.pcap
    LOGGER.info "NAM","VM#{guestvm[0]} ".yellow + "Start sniffing module"
    LOGGER.debug "NAM","VM#{guestvm[0]} ".yellow + "Tcpdump instance #{pid} started" if VERBOSE

    sleep 5

    begin
      #Execute File into VM
      LOGGER.info "VSM","VM#{guestvm[0]} ".yellow + "Executing #{bin.md5} File into VM"

      guestpid = vsm.exec_file("#{bin.md5}#{bin.extension}")

      LOGGER.debug "VSM","VM#{guestvm[0]} ".yellow + "Program executed with PID #{guestpid}" if VERBOSE


      LOGGER.info "VSM","VM#{guestvm[0]}".yellow + " Sleeping #{DoroSettings.sandbox[:sleeptime]} seconds".yellow

      #wait n seconds

      (1..DoroSettings.sandbox[:sleeptime]).each do |i|
        @screenshot1 = vsm.screenshot if i == DoroSettings.sandbox[:screen1time]
        @screenshot2 = vsm.screenshot if i == DoroSettings.sandbox[:screen2time]
        #t = "."*i
        #print "VM#{guestvm[0]}Sleeping #{SLEEPTIME} seconds".yellow  + " #{t}\r"
        #print "VM#{guestvm[0]}Sleeping #{SLEEPTIME} seconds".yellow + " #{t}" + " [Done]\n".green if i == SLEEPTIME
        sleep 1
        $stdout.flush
      end



      #Stopt Sniffer
      LOGGER.info "NAM", "VM#{guestvm[0]} ".yellow + "Stopping sniffing module " + pid.to_s
      @nam.stop_sniffer(pid)

      #Stop/Revert VM
      LOGGER.info "VSM","VM#{guestvm[0]} ".yellow + "Reverting VM"
      vsm.revert_vm

      sleep 5

    rescue => e

      LOGGER.error "SANDBOX", "VM#{guestvm[0]} - An error occourred while executing the file into the vm:\n  #{$!}"

      LOGGER.debug "SANDBOX" , "#{$!}\n #{e.inspect} \n #{e.backtrace}" if VERBOSE

      LOGGER.warn "SANDBOX", "VM#{guestvm[0]} ".red + "[RECOVER] Stopping sniffing module ".yellow + pid.to_s
      @nam.stop_sniffer(pid)

      LOGGER.warn "SANDBOX", "VM#{guestvm[0]} ".red + "[RECOVER] Reverting VM".yellow
      vsm.revert_vm
      sleep 5

      LOGGER.warn "SANDBOX", "VM#{guestvm[0]} ".red + "[RECOVER] Recovering finished, skipping to next binaries".yellow
      FileUtils.rm_r(sample_home)
      return false

    end


    #Downloading PCAP
    LOGGER.info "NAM", "VM#{guestvm[0]} ".yellow + "Downloading #{dumpname}.pcap to #{bin.dir_pcap}"
    #t = DoroSettings.nam[:pcaphome] + "/" + dumpname + ".pcap"
    Ssh.download(DoroSettings.nam[:host], DoroSettings.nam[:user],DoroSettings.nam[:pass], DoroSettings.nam[:pcaphome] + "/" + dumpname + ".pcap", bin.dir_pcap)

    #Downloading Screenshots from esx
    LOGGER.info "NAM", "VM#{guestvm[0]} ".yellow + "Downloading Screenshots"
    Ssh.download(DoroSettings.esx[:host],DoroSettings.esx[:user], DoroSettings.esx[:pass], @screenshot1, bin.dir_screens)
    Ssh.download(DoroSettings.esx[:host],DoroSettings.esx[:user], DoroSettings.esx[:pass], @screenshot2, bin.dir_screens)

    #Put them to 644
    File.chmod(0644, bin.dir_screens + File.basename(@screenshot1), bin.dir_screens + File.basename(@screenshot2) )

    #####################
    #UPDATE DOROTHIBE DB#
    #####################

    pcapfile =  bin.dir_pcap + dumpname + ".pcap"
    dump = Loadmalw.new(pcapfile)

    #pcaprpath = bin.md5 + "/pcap/" + dump.filename
    pcaprid = Loadmalw.calc_pcaprid(dump.filename, dump.size)

    LOGGER.debug "NAM", "VM#{guestvm[0]} ".yellow + "Pcaprid: " + pcaprid if VERBOSE

    empty_pcap = false

    if dump.size <= 30
      LOGGER.warn "NAM", "VM#{guestvm[0]} WARNING - EMPTY PCAP FILE!!!! ::.."
      #FileUtils.rm_r(sample_home)
      empty_pcap = true
    end

    dumpvalues = [dump.sha, dump.size, pcaprid, dump.binpath, 'false']
    dump.sha = "EMPTYPCAP" if empty_pcap
    analysis_values = [anal_id, bin.sha, guestvm[0], dump.sha, get_time]

    if pcaprid.nil? || bin.dir_pcap.nil? || bin.sha.nil? || bin.md5.nil?
      LOGGER.error "SANDBOX", "VM#{guestvm[0]} Can't retrieve the required information"
      FileUtils.rm_r(sample_home)
      return false
    end


    LOGGER.debug "DB", "VM#{guestvm[0]} Database insert phase" if VERBOSE

    db = Insertdb.new
    db.begin_t  #needed for rollbacks

    unless empty_pcap
      unless db.insert("traffic_dumps", dumpvalues)
        LOGGER.fatal "DB", "VM#{guestvm[0]} Error while inserting data into table traffic_dumps. Skipping binary #{bin.md5}"
        FileUtils.rm_r(sample_home)
        return false
      end
    end



    unless db.insert("analyses", analysis_values)
      LOGGER.fatal "DB", "VM#{guestvm[0]} Error while inserting data into table analyses. Skipping binary #{bin.md5}"
      FileUtils.rm_r(sample_home)
      return false
    end

    #TODO ADD RT CODE

    db.commit
    db.close

    LOGGER.info "VSM", "VM#{guestvm[0]} ".yellow + "Removing file from /bins directory"
    FileUtils.rm(bin.binpath)
    LOGGER.info "VSM", "VM#{guestvm[0]} ".yellow + "Process compleated successfully"

  rescue => e

    LOGGER.error "SANDBOX", "VM#{guestvm[0]} An error occurred while analyzing #{bin.filename}, skipping\n"
    LOGGER.debug "Dorothy" , "#{$!}\n #{e.inspect} \n #{e.backtrace}" if VERBOSE

    FileUtils.rm_r(sample_home)
    db.rollback unless db.nil?  #rollback in case there is a transaction on going
    return false
  end





end

#check_support(bin) ⇒ Object 



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# File 'lib/dorothy2.rb', line 60

def check_support(bin)
  if bin.extension == ".exe" || bin.extension == ".bat"
    true
  else
    LOGGER.warn("SANDBOX", "File #{bin.filename} actually not supported, skipping\n" + "	Filtype: #{bin.type}") # if VERBOSE
    dir_not_supported = File.dirname(bin.binpath) + "/not_supported"
    Dir.mkdir(dir_not_supported) unless File.exists?(dir_not_supported)
    FileUtils.cp(bin.binpath,dir_not_supported) #mv?
    FileUtils.rm(bin.binpath) ## mv?
    return false
  end
end

#get_time ⇒ Object 



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# File 'lib/dorothy2.rb', line 39

def get_time
  time = Time.new
  time.utc.strftime("%Y-%m-%d %H:%M:%S")
end

#start_analysis(bins) ⇒ Object 



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# File 'lib/dorothy2.rb', line 45

def start_analysis(bins)
  bins.each do |bin|
    next unless check_support(bin)
    scan(bin) unless DoroSettings.env[:testmode]   #avoid to stress VT if we are just testing
    @analysis_threads << Thread.new(bin.filename){
      db = Insertdb.new
      sleep 30 while !(guestvm = db.find_vm)  #guestvm struct: array ["sandbox id", "sandbox name", "ipaddress", "user", "password"]
      analyze(bin, guestvm)
      db.free_vm(guestvm[0])
      db.close
    }
  end
end