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sfp_crxcavator.py
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sfp_crxcavator.py
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# -*- coding: utf-8 -*-
# -------------------------------------------------------------------------------
# Name: sfp_crxcavator
# Purpose: Query CRXcavator for Chrome extensions.
#
# Author: <bcoles@gmail.com>
#
# Created: 2020-09-19
# Copyright: (c) bcoles 2019
# Licence: MIT
# -------------------------------------------------------------------------------
import json
import time
import urllib.error
import urllib.parse
import urllib.request
from spiderfoot import SpiderFootEvent, SpiderFootPlugin
class sfp_crxcavator(SpiderFootPlugin):
meta = {
'name': "CRXcavator",
'summary': "Search CRXcavator for Chrome extensions.",
'flags': [],
'useCases': ["Investigate", "Footprint", "Passive"],
'categories': ["Search Engines"],
'dataSource': {
'website': "https://crxcavator.io/",
'model': "FREE_NOAUTH_UNLIMITED",
'favIcon': "https://crxcavator.io/favicon-32x32.png",
'logo': "https://crxcavator.io/apple-touch-icon.png",
'description': "CRXcavator automatically scans the entire Chrome Web "
"Store every 3 hours and produces a quantified risk score for "
"each Chrome Extension based on several factors.",
}
}
opts = {
"verify": True,
}
optdescs = {
"verify": "Verify identified hostnames resolve.",
}
results = None
errorState = False
def setup(self, sfc, userOpts=dict()):
self.sf = sfc
self.results = self.tempStorage()
for opt in list(userOpts.keys()):
self.opts[opt] = userOpts[opt]
def watchedEvents(self):
return [
'DOMAIN_NAME'
]
def producedEvents(self):
return [
'APPSTORE_ENTRY',
'INTERNET_NAME',
'INTERNET_NAME_UNRESOLVED',
'LINKED_URL_INTERNAL',
'AFFILIATE_INTERNET_NAME',
'AFFILIATE_INTERNET_NAME_UNRESOLVED',
'PHYSICAL_ADDRESS',
'RAW_RIR_DATA'
]
def query(self, qry):
params = urllib.parse.urlencode({
'q': qry.encode('raw_unicode_escape').decode("ascii", errors='replace')
})
res = self.sf.fetchUrl(
f"https://api.crxcavator.io/v1/search?{params}",
useragent=self.opts['_useragent'],
timeout=self.opts['_fetchtimeout']
)
time.sleep(1)
if res['content'] is None:
return None
try:
data = json.loads(res['content'])
except Exception as e:
self.debug(f"Error processing JSON response from CRXcavator: {e}")
return None
if not data:
self.debug(f"No results found for {qry}")
return None
return data
def queryExtension(self, extension_id):
res = self.sf.fetchUrl(
f"https://api.crxcavator.io/v1/report/{extension_id}",
useragent=self.opts['_useragent'],
timeout=self.opts['_fetchtimeout']
)
time.sleep(1)
if res['content'] is None:
return None
try:
data = json.loads(res['content'])
except Exception as e:
self.debug(f"Error processing JSON response from CRXcavator: {e}")
return None
if not data:
self.debug(f"No results found for extension {extension_id}")
return None
return data
def handleEvent(self, event):
eventName = event.eventType
srcModuleName = event.module
eventData = event.data
if self.errorState:
return
self.debug(f"Received event, {eventName}, from {srcModuleName}")
if eventData in self.results:
self.debug(f"Skipping {eventData}, already checked.")
return
if eventName not in self.watchedEvents():
return
self.results[eventData] = True
domain_keyword = self.sf.domainKeyword(eventData, self.opts['_internettlds'])
results = self.query(domain_keyword)
if not results:
self.info(f"No results found for {domain_keyword}")
return
evt = SpiderFootEvent('RAW_RIR_DATA', json.dumps(results), self.__name__, event)
self.notifyListeners(evt)
urls = list()
hosts = list()
locations = list()
for result in results:
if not isinstance(result, dict):
continue
extension_id = result.get('extension_id')
if not extension_id:
continue
if '@' in extension_id:
continue
extensions = self.queryExtension(extension_id)
if not extensions:
continue
evt = SpiderFootEvent('RAW_RIR_DATA', json.dumps(extensions), self.__name__, event)
self.notifyListeners(evt)
for extension in extensions:
data = extension.get('data')
if not data:
continue
manifest = data.get('manifest')
if not manifest:
continue
version = manifest.get('version')
if not version:
continue
webstore = data.get('webstore')
if not webstore:
continue
name = webstore.get('name')
if not name:
continue
app_full_name = f"{name} {version} ({extension_id})"
privacy_policy = webstore.get('privacy_policy')
support_site = webstore.get('support_site')
offered_by = webstore.get('offered_by')
website = webstore.get('website')
if not privacy_policy and not support_site and not offered_by and not website:
continue
if (
not self.getTarget().matches(self.sf.urlFQDN(privacy_policy), includeChildren=True, includeParents=True)
and not self.getTarget().matches(self.sf.urlFQDN(website), includeChildren=True, includeParents=True)
and not self.getTarget().matches(self.sf.urlFQDN(offered_by), includeChildren=True, includeParents=True)
and not self.getTarget().matches(self.sf.urlFQDN(support_site), includeChildren=True, includeParents=True)
):
self.debug(f"Extension {app_full_name} does not match {eventData}, skipping")
continue
app_data = f"{name} {version}\n<SFURL>https://chrome.google.com/webstore/detail/{extension_id}</SFURL>"
evt = SpiderFootEvent('APPSTORE_ENTRY', app_data, self.__name__, event)
self.notifyListeners(evt)
if privacy_policy:
urls.append(privacy_policy)
if support_site:
urls.append(support_site)
if website:
urls.append(website)
if offered_by:
urls.append(offered_by)
address = webstore.get('address')
if address and len(address) > 10:
locations.append(address)
for url in set(urls):
if not url:
continue
host = self.sf.urlFQDN(url)
if not host:
continue
if self.getTarget().matches(host, includeChildren=True, includeParents=True):
evt = SpiderFootEvent('LINKED_URL_INTERNAL', url, self.__name__, event)
self.notifyListeners(evt)
hosts.append(host)
for host in set(hosts):
if not host:
continue
if self.getTarget().matches(host, includeChildren=True, includeParents=True):
evt_type = 'INTERNET_NAME'
else:
evt_type = 'AFFILIATE_INTERNET_NAME'
if self.opts['verify'] and not self.sf.resolveHost(host) and not self.sf.resolveHost6(host):
self.debug(f"Host {host} could not be resolved")
evt_type += '_UNRESOLVED'
evt = SpiderFootEvent(evt_type, host, self.__name__, event)
self.notifyListeners(evt)
for location in set(locations):
evt = SpiderFootEvent("PHYSICAL_ADDRESS", location, self.__name__, event)
self.notifyListeners(evt)
# End of sfp_crxcavator class