Module: FIDIUS::EvasionDB::SnortRuleFetcher

Defined in:
lib/evasion-db/rule_fetchers/snort/lib/snort.rb

Constant Summary collapse

@@rule_path = 
nil
@@ssh_host = 
nil
@@ssh_pw = 
nil
@@ssh_remote_path = 
nil
@@ssh_user = 
nil
@@fetch_remote = 
false
@@ssh_options = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.ssh_options=(a) ⇒ Object 



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# File 'lib/evasion-db/rule_fetchers/snort/lib/snort.rb', line 95

def self.ssh_options=(a)
  @@ssh_options = a
end

Instance Method Details

#config(conf) ⇒ Object 



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# File 'lib/evasion-db/rule_fetchers/snort/lib/snort.rb', line 81

def config(conf)
  return unless conf
  conf = conf["snort-fetcher"]
  return unless conf.class == Hash

  @@rule_path = conf["rule_path"]#"/home/bernd/fidius/snort/rules/fetched"

  @@ssh_host = conf["ssh_host"] #"10.10.10.254"
  @@ssh_pw = conf["ssh_pw"]#"fidius09"
  @@ssh_remote_path = conf["ssh_remote_path"] #"/etc/snort/rules/"
  @@ssh_user = conf["ssh_user"] #"fidius"
  @@fetch_remote = @@ssh_host != nil
end

#fetch_rules(attack_module) ⇒ Object

generate a bitvector based on activated rules and assign this bisvector to the given attack_module



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# File 'lib/evasion-db/rule_fetchers/snort/lib/snort.rb', line 34

def fetch_rules(attack_module)
  import_rules_to_snortor

  raise "this attack_module has an ruleset bitvector" if attack_module.enabled_rules

  start_time = Time.now
  rules_enabled = BitField.new(Snortor.rules.size)
  i = 0
  Snortor.rules.each do |rule|
    if rule.message
      rules_enabled[i] = (rule.active == true)? 1 : 0
      i += 1
    end
  end
  end_time = Time.now

  ruleset = FIDIUS::EvasionDB::Knowledge::EnabledRules.create(:bitstring=>rules_enabled.to_s)
  ruleset.attack_module = attack_module
  ruleset.save
end

#import_rules ⇒ Object

fetches rules with snortor and stores them all into db



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# File 'lib/evasion-db/rule_fetchers/snort/lib/snort.rb', line 57

def import_rules
  raise "rules imported already" if FIDIUS::EvasionDB::Knowledge::IdsRule.all.size > 0
  import_rules_to_snortor

  i = 0
  insert_query = []
  Snortor.rules.each do |rule|
    if rule.message
      insert_query << FIDIUS::EvasionDB::Knowledge::IdsRule.sub_query_for_insert(rule.message,i)
      i += 1
    end
  end
  begin
    FIDIUS::EvasionDB::Knowledge::IdsRule.connection.execute("INSERT IGNORE INTO ids_rules (rule_text,rule_hash,sort) VALUES #{insert_query.join(',')};")
  rescue
    begin
      # try without IGNORE statement
      FIDIUS::EvasionDB::Knowledge::IdsRule.connection.execute("INSERT INTO ids_rules (rule_text,rule_hash,sort) VALUES #{insert_query.join(',')};")
    rescue
      puts $!.message+":"+$!.backtrace.to_s
    end
  end
end

#import_rules_to_snortor ⇒ Object 



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# File 'lib/evasion-db/rule_fetchers/snort/lib/snort.rb', line 22

def import_rules_to_snortor
  raise "no rulepath given" unless @@rule_path
  if @@fetch_remote
    a = {:host=>@@ssh_host,:user=>@@ssh_user,:password=>@@ssh_pw,:remote_path=>@@ssh_remote_path,:options=>@@ssh_options}
    puts "Snortor.import_rules(#{a.inspect})"
    Snortor.import_rules(a)
  else
    Snortor.import_rules(@@rule_path)
  end
end