#!/usr/bin/env python # Elasticsearch Recon Ingestion Scripts (ERIS) - Developed by Acidvegas (https://git.acid.vegas/eris) # DNS Zone File Ingestion: # # This script will read a DNS zone file and index the records to Elasticsearch. # # Zone files must be valid and follow the RFC 1035 standard for proper indexing: # - https://datatracker.ietf.org/doc/html/rfc1035 # # Most of my zones come from CZDS but AXFR outputs can be used as well. # Anomaly detection is in place to alert the user of any unexpected records. import argparse import logging import os import time try: from elasticsearch import Elasticsearch, helpers except ImportError: raise ImportError('Missing required \'elasticsearch\' library. (pip install elasticsearch)') # Setting up logging logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', datefmt='%m/%d %I:%M:%S') # Record types to index record_types = ('a','aaaa','caa','cdnskey','cds','cname','dnskey','ds','mx','ns','nsec','nsec3','nsec3param','ptr','rrsig','sshfp','soa','srv','txt','type65534') class ElasticIndexer: def __init__(self, es_host: str, es_port: str, es_user: str, es_password: str, es_api_key: str, es_index: str, dry_run: bool = False, self_signed: bool = False): ''' Initialize the Elastic Search indexer. :param es_host: Elasticsearch host :param es_port: Elasticsearch port :param es_user: Elasticsearch username :param es_password: Elasticsearch password :param es_api_key: Elasticsearch API Key :param es_index: Elasticsearch index name :param dry_run: If True, do not initialize Elasticsearch client :param self_signed: If True, do not verify SSL certificates ''' self.dry_run = dry_run self.es = None self.es_index = es_index if not dry_run: if es_api_key: self.es = Elasticsearch([f'{es_host}:{es_port}'], headers={'Authorization': f'ApiKey {es_api_key}'}, verify_certs=self_signed, ssl_show_warn=self_signed) else: self.es = Elasticsearch([f'{es_host}:{es_port}'], basic_auth=(es_user, es_password), verify_certs=self_signed, ssl_show_warn=self_signed) def create_index(self, shards: int = 1, replicas: int = 1): '''Create the Elasticsearch index with the defined mapping.''' mapping = { 'settings': { 'number_of_shards': shards, 'number_of_replicas': replicas }, 'mappings': { 'properties': { 'domain': { 'type': 'text', 'fields': { 'keyword': { 'type': 'keyword', 'ignore_above': 256 } } }, 'records': { 'properties': {} }, 'seen': {'type': 'date'} } } } # Add record types to mapping dynamically to not clutter the code for item in record_types: if item in ('a','aaaa'): mapping['mappings']['properties']['records']['properties'][item] = { 'properties': { 'data': { 'type': 'ip' }, 'ttl': { 'type': 'integer' } } } else: mapping['mappings']['properties']['records']['properties'][item] = { 'properties': { 'data': { 'type': 'text', 'fields': { 'keyword': { 'type': 'keyword', 'ignore_above': 256 } } }, 'ttl': { 'type': 'integer' } } } if not self.es.indices.exists(index=self.es_index): response = self.es.indices.create(index=self.es_index, body=mapping) if response.get('acknowledged') and response.get('shards_acknowledged'): logging.info(f'Index \'{self.es_index}\' successfully created.') else: raise Exception(f'Failed to create index. ({response})') else: logging.warning(f'Index \'{self.es_index}\' already exists.') def process_file(self, file_path: str, batch_size: int): ''' Read and index DNS records in batches to Elasticsearch, handling large volumes efficiently. :param file_path: Path to the DNS zone file :param batch_size: Number of records to process before indexing Example record: 0so9l9nrl425q3tf7dkv1nmv2r3is6vm.vegas. 3600 in nsec3 1 1 100 332539EE7F95C32A 10MHUKG4FHIAVEFDOTF6NKU5KFCB2J3A NS DS RRSIG 0so9l9nrl425q3tf7dkv1nmv2r3is6vm.vegas. 3600 in rrsig NSEC3 8 2 3600 20240122151947 20240101141947 4125 vegas. hzIvQrZIxBSwRWyiHkb5M2W0R3ikNehv884nilkvTt9DaJSDzDUrCtqwQb3jh6+BesByBqfMQK+L2n9c//ZSmD5/iPqxmTPCuYIB9uBV2qSNSNXxCY7uUt5w7hKUS68SLwOSjaQ8GRME9WQJhY6gck0f8TT24enjXXRnQC8QitY= 1-800-flowers.vegas. 3600 in ns dns1.cscdns.net. 1-800-flowers.vegas. 3600 in ns dns2.cscdns.net. 100.vegas. 3600 in ns ns51.domaincontrol.com. 100.vegas. 3600 in ns ns52.domaincontrol.com. 1001.vegas. 3600 in ns ns11.waterrockdigital.com. 1001.vegas. 3600 in ns ns12.waterrockdigital.com. Will be indexed as: { "domain": "1001.vegas", "records": { "ns": [ {"ttl": 3600, "data": "ns11.waterrockdigital.com"}, {"ttl": 3600, "data": "ns12.waterrockdigital.com"} ] }, "seen": "2021-09-01T00:00:00Z" # Zulu time added upon indexing } ''' count = 0 records = [] domain_records = {} last_domain = None with open(file_path, 'r') as file: for line in file: line = line.strip() if not line or line.startswith(';'): continue parts = line.split() if len(parts) < 5: raise ValueError(f'Invalid line: {line}') domain, ttl, record_class, record_type, data = parts[0].rstrip('.').lower(), parts[1], parts[2].lower(), parts[3].lower(), ' '.join(parts[4:]) if not ttl.isdigit(): raise ValueError(f'Invalid TTL: {ttl} with line: {line}') ttl = int(ttl) if record_class != 'in': raise ValueError(f'Unsupported record class: {record_class} with line: {line}') # Anomaly (Doubtful any CHAOS/HESIOD records will be found) # We do not want to collide with our current mapping (Again, this is an anomaly) if record_type not in record_types: raise ValueError(f'Unsupported record type: {record_type} with line: {line}') # Little tidying up for specific record types if record_type == 'nsec': data = ' '.join([data.split()[0].rstrip('.'), *data.split()[1:]]) elif record_type == 'soa': data = ' '.join([part.rstrip('.') if '.' in part else part for part in data.split()]) elif data.endswith('.'): data = data.rstrip('.') if domain != last_domain: if last_domain: source = {'domain': last_domain, 'records': domain_records[last_domain], 'seen': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime())} del domain_records[last_domain] if self.dry_run: print(source) else: struct = {'_index': self.es_index, '_source': source} records.append(struct) count += 1 if len(records) >= batch_size: success, _ = helpers.bulk(self.es, records) logging.info(f'Successfully indexed {success:,} ({count:,}) records to {self.es_index} from {file_path}') records = [] last_domain = domain domain_records[domain] = {} if record_type not in domain_records[domain]: domain_records[domain][record_type] = [] domain_records[domain][record_type].append({'ttl': ttl, 'data': data}) if records: success, _ = helpers.bulk(self.es, records) logging.info(f'Successfully indexed {success:,} ({count:,}) records to {self.es_index} from {file_path}') def main(): '''Main function when running this script directly.''' parser = argparse.ArgumentParser(description='Index data into Elasticsearch.') parser.add_argument('input_path', help='Path to the input file or directory') # General arguments parser.add_argument('--dry-run', action='store_true', help='Dry run (do not index records to Elasticsearch)') parser.add_argument('--batch_size', type=int, default=50000, help='Number of records to index in a batch') # Elasticsearch connection arguments parser.add_argument('--host', default='localhost', help='Elasticsearch host') parser.add_argument('--port', type=int, default=9200, help='Elasticsearch port') parser.add_argument('--user', default='elastic', help='Elasticsearch username') parser.add_argument('--password', default=os.getenv('ES_PASSWORD'), help='Elasticsearch password (if not provided, check environment variable ES_PASSWORD)') parser.add_argument('--api-key', help='Elasticsearch API Key for authentication') parser.add_argument('--self-signed', action='store_false', help='Elasticsearch is using self-signed certificates') # Elasticsearch indexing arguments parser.add_argument('--index', default='zone-files', help='Elasticsearch index name') parser.add_argument('--shards', type=int, default=1, help='Number of shards for the index') # This depends on your cluster configuration parser.add_argument('--replicas', type=int, default=1, help='Number of replicas for the index') # This depends on your cluster configuration args = parser.parse_args() if not os.path.exists(args.input_path): raise FileNotFoundError(f'Input file {args.input_path} does not exist') if not args.dry_run: if args.batch_size < 1: raise ValueError('Batch size must be greater than 0') if not args.host: raise ValueError('Missing required Elasticsearch argument: host') if not args.api_key and (not args.user or not args.password): raise ValueError('Missing required Elasticsearch argument: either user and password or apikey') if args.shards < 1: raise ValueError('Number of shards must be greater than 0') if args.replicas < 1: raise ValueError('Number of replicas must be greater than 0') logging.info(f'Connecting to Elasticsearch at {args.host}:{args.port}...') edx = ElasticIndexer(args.host, args.port, args.user, args.password, args.api_key, args.index, args.dry_run, args.self_signed) if not args.dry_run: edx.create_index(args.shards, args.replicas) # Create the index if it does not exist if os.path.isfile(args.input_path): logging.info(f'Processing file: {args.input_path}') edx.process_file(args.input_path, args.batch_size) elif os.path.isdir(args.input_path): logging.info(f'Processing files in directory: {args.input_path}') for file in sorted(os.listdir(args.input_path)): file_path = os.path.join(args.input_path, file) if os.path.isfile(file_path): logging.info(f'Processing file: {file_path}') edx.process_file(file_path, args.batch_size) else: raise ValueError(f'Input path {args.input_path} is not a file or directory') if __name__ == '__main__': main()