Class: Rex::Parser::Unattend

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/parser/unattend.rb

Overview

This is a parser for the Windows Unattended Answer File format. It's used by modules/post/windows/gather/enum_unattend.rb and uses REXML (as opposed to Nokogiri) for its XML parsing. See: technet.microsoft.com/en-us/library/ff715801

http://technet.microsoft.com/en-us/library/cc749415(v=ws.10).aspx

Samples: technet.microsoft.com/en-us/library/cc732280%28v=ws.10%29.aspx

Class Method Summary collapse

Class Method Details

.create_table(results) ⇒ Object


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# File 'lib/rex/parser/unattend.rb', line 147

def self.create_table(results)
  return nil if results.nil? or results.empty?
  table = Rex::Ui::Text::Table.new({
    'Header' => 'Unattend Credentials',
    'Indent' => 1,
    'Columns' => ['Type', 'Domain', 'Username', 'Password', 'Groups']
  })

  results.each do |result|
    case result['type']
      when 'wds', 'auto', 'domain_join'
        table << [result['type'], result['domain'], result['username'], result['password'], ""]
      when 'admin', 'local'
        table << [result['type'], "", result['username'], result['password'], ""]
      when 'domain'
        table << [result['type'], "", result['username'], "", result['group']]
    end
  end

  return table
end

.extract_autologon(auto_logon) ⇒ Object

Extract sensitive data from AutoLogon


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# File 'lib/rex/parser/unattend.rb', line 69

def self.extract_autologon(auto_logon)
  return [] if auto_logon.nil?

  domain    = auto_logon.elements['Domain'].get_text.value rescue ''
  username  = auto_logon.elements['Username'].get_text.value rescue ''
  password  = auto_logon.elements['Password/Value'].get_text.value rescue ''
  plaintext = auto_logon.elements['Password/PlainText'].get_text.value rescue 'true'

  if plaintext == 'false'
    password = Rex::Text.decode_base64(password)
    password = password.gsub(/#{Rex::Text.to_unicode('Password')}$/, '')
  end

  return {'type' => 'auto', 'domain' => domain, 'username' => username, 'password' => password }
end

.extract_deployment(deployment) ⇒ Object

Extract sensitive data from Deployment Services. We can only seem to add one <Login> with Windows System Image Manager, so we'll only enum one.


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# File 'lib/rex/parser/unattend.rb', line 39

def self.extract_deployment(deployment)
  return [] if deployment.nil?
  domain    = deployment.elements['Login/Credentials/Domain'].get_text.value rescue ''
  username  = deployment.elements['Login/Credentials/Username'].get_text.value rescue ''
  password  = deployment.elements['Login/Credentials/Password'].get_text.value rescue ''
  plaintext = deployment.elements['Login/Credentials/Password/PlainText'].get_text.value rescue 'true'

  if plaintext == 'false'
    password = Rex::Text.decode_base64(password)
    password = password.gsub(/#{Rex::Text.to_unicode('Password')}$/, '')
  end

  return {'type' => 'wds', 'domain' => domain, 'username' => username, 'password' => password }
end

.extract_domain_join(credentials) ⇒ Object

Extract sensitive data from 'Secure' Domain Join


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# File 'lib/rex/parser/unattend.rb', line 57

def self.extract_domain_join(credentials)
  return [] if credentials.nil?
  domain    = credentials.elements['Domain'].get_text.value rescue ''
  username  = credentials.elements['Username'].get_text.value rescue ''
  password  = credentials.elements['Password'].get_text.value rescue ''

  return {'type' => 'domain_join', 'domain' => domain, 'username' => username, 'password' => password }
end

.extract_useraccounts(user_accounts) ⇒ Object

Extract sensitive data from UserAccounts


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# File 'lib/rex/parser/unattend.rb', line 88

def self.extract_useraccounts(user_accounts)
  return[] if user_accounts.nil?

  results = []
   = ['AdministratorPassword', 'DomainAccounts', 'LocalAccounts']
  .each do |t|
    element = user_accounts.elements[t]
    next if element.nil?

    case t
    #
    # Extract the password from AdministratorPasswords
    #
    when [0]
      password = element.elements['Value'].get_text.value rescue ''
      plaintext = element.elements['PlainText'].get_text.value rescue 'true'

      if plaintext == 'false'
        password = Rex::Text.decode_base64(password)
        password = password.gsub(/#{Rex::Text.to_unicode('AdministratorPassword')}$/, '')
      end

      unless password.empty?
        results << {'type' => 'admin', 'username' => 'Administrator', 'password' => password}
      end

    #
    # Extract the sensitive data from DomainAccounts.
    # According to MSDN, unattend.xml doesn't seem to store passwords for domain accounts
    #
    when [1]  #DomainAccounts
      element.elements.each do ||
        name = .elements['DomainAccount/Name'].get_text.value rescue ''
        group = .elements['DomainAccount/Group'].get_text.value rescue 'true'

        results << {'type' => 'domain', 'username' => name, 'group' => group}
      end
    #
    # Extract the username/password from LocalAccounts
    #
    when [2]  #LocalAccounts
      element.elements.each do |local|
        password = local.elements['Password/Value'].get_text.value rescue ''
        plaintext = local.elements['Password/PlainText'].get_text.value rescue 'true'

        if plaintext == 'false'
          password = Rex::Text.decode_base64(password)
          password = password.gsub(/#{Rex::Text.to_unicode('Password')}$/, '')
        end

        username = local.elements['Name'].get_text.value rescue ''
        results << {'type' => 'local', 'username' => username, 'password' => password}
      end
    end
  end

  return results
end

.parse(xml) ⇒ Object


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# File 'lib/rex/parser/unattend.rb', line 16

def self.parse(xml)
  return [] if xml.nil?
  results = []
  unattend = xml.elements['unattend']
  return [] if unattend.nil?
  unattend.each_element do |settings|
      next if settings.class != REXML::Element
      settings.get_elements('component').each do |c|
        next if c.class != REXML::Element
        results << extract_useraccounts(c.elements['UserAccounts'])
        results << extract_autologon(c.elements['AutoLogon'])
        results << extract_deployment(c.elements['WindowsDeploymentServices'])
        results << extract_domain_join(c.elements['Identification/Credentials'])
      end
    end
  return results.flatten
end