mirror of https://github.com/CIRCL/lookyloo
106 lines
3.7 KiB
Python
106 lines
3.7 KiB
Python
#!/usr/bin/env python3
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import json
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import logging
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import time
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from datetime import date
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from typing import Any, Dict, Optional
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import vt # type: ignore
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from har2tree import CrawledTree
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from vt.error import APIError # type: ignore
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from ..default import ConfigError, get_homedir, get_config
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from ..helpers import get_cache_directory
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class VirusTotal():
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def __init__(self, config: Dict[str, Any]):
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self.logger = logging.getLogger(f'{self.__class__.__name__}')
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self.logger.setLevel(get_config('generic', 'loglevel'))
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if not config.get('apikey'):
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self.available = False
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return
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self.available = True
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self.autosubmit = False
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self.allow_auto_trigger = False
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self.client = vt.Client(config['apikey'])
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if config.get('allow_auto_trigger'):
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self.allow_auto_trigger = True
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if config.get('autosubmit'):
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self.autosubmit = True
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self.storage_dir_vt = get_homedir() / 'vt_url'
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self.storage_dir_vt.mkdir(parents=True, exist_ok=True)
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def get_url_lookup(self, url: str) -> Optional[Dict[str, Any]]:
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url_storage_dir = get_cache_directory(self.storage_dir_vt, vt.url_id(url))
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if not url_storage_dir.exists():
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return None
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cached_entries = sorted(url_storage_dir.glob('*'), reverse=True)
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if not cached_entries:
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return None
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with cached_entries[0].open() as f:
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return json.load(f)
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def capture_default_trigger(self, crawled_tree: CrawledTree, /, *, force: bool=False, auto_trigger: bool=False) -> Dict:
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'''Run the module on all the nodes up to the final redirect'''
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if not self.available:
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return {'error': 'Module not available'}
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if auto_trigger and not self.allow_auto_trigger:
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return {'error': 'Auto trigger not allowed on module'}
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if crawled_tree.redirects:
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for redirect in crawled_tree.redirects:
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self.url_lookup(redirect, force)
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else:
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self.url_lookup(crawled_tree.root_hartree.har.root_url, force)
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return {'success': 'Module triggered'}
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def url_lookup(self, url: str, force: bool=False) -> None:
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'''Lookup an URL on VT
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Note: force means 2 things:
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* (re)scan of the URL
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* re fetch the object from VT even if we already did it today
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Note: the URL will only be sent for scan if autosubmit is set to true in the config
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'''
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if not self.available:
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raise ConfigError('VirusTotal not available, probably no API key')
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url_storage_dir = get_cache_directory(self.storage_dir_vt, vt.url_id(url))
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url_storage_dir.mkdir(parents=True, exist_ok=True)
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vt_file = url_storage_dir / date.today().isoformat()
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scan_requested = False
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if self.autosubmit and force:
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self.client.scan_url(url)
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scan_requested = True
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if not force and vt_file.exists():
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return
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url_id = vt.url_id(url)
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for _ in range(3):
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try:
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url_information = self.client.get_object(f"/urls/{url_id}")
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with vt_file.open('w') as _f:
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json.dump(url_information.to_dict(), _f)
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break
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except APIError as e:
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if not self.autosubmit:
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break
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if not scan_requested and e.code == 'NotFoundError':
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try:
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self.client.scan_url(url)
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scan_requested = True
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except APIError as e:
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self.logger.warning(f'Unable to trigger VirusTotal on {url}: {e}')
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break
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time.sleep(5)
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