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#!/usr/bin/python3
# coding=utf-8
"""
OneForAll subdomain brute module
:copyright: Copyright (c) 2019, Jing Ling. All rights reserved.
:license: GNU General Public License v3.0, see LICENSE for more details.
"""
import gc
import json
import time
import random
import secrets
import exrex
import fire
import tenacity
from dns.exception import Timeout
from dns.resolver import NXDOMAIN, YXDOMAIN, NoAnswer, NoNameservers
import dbexport
from common import utils
from config import setting
from common.module import Module
from config.log import logger
@tenacity.retry(stop=tenacity.stop_after_attempt(3))
def do_query_a(domain, resolver):
try:
answer = resolver.query(domain, 'A')
# If resolve random subdomain raise timeout error, try again
except Timeout as e:
logger.log('ALERT', f'DNS resolve timeout, retrying')
logger.log('DEBUG', e.args)
raise tenacity.TryAgain
# If resolve random subdomain raise NXDOMAIN, YXDOMAIN, NoAnswer, NoNameservers error
# It means that there is no A record of random subdomain and not use wildcard dns record
except (NXDOMAIN, YXDOMAIN, NoA
8000
nswer, NoNameservers) as e:
logger.log('DEBUG', e.args)
logger.log('INFOR', f'{domain} seems not use wildcard dns record')
return False
except Exception as e:
logger.log('ALERT', f'Detect {domain} wildcard dns record error')
logger.log('FATAL', e.args)
exit(1)
else:
if answer.rrset is None:
logger.log('ALERT', f'DNS resolve dont have result, retrying')
raise tenacity.TryAgain
ttl = answer.ttl
name = answer.name
ips = {item.address for item in answer}
logger.log('ALERT', f'{domain} use wildcard dns record')
logger.log('ALERT', f'{domain} resolve to: {name} '
f'IP: {ips} TTL: {ttl}')
return True
def detect_wildcard(domain, authoritative_ns):
"""
Detect use wildcard dns record or not
:param str domain: domain
:param list authoritative_ns: authoritative name server
:return bool use wildcard dns record or not
"""
logger.log('INFOR', f'Detecting {domain} use wildcard dns record or not')
token = secrets.token_hex(4)
random_subdomain = f'{token}.{domain}'
resolver = utils.dns_resolver()
resolver.nameservers = authoritative_ns
resolver.rotate = True
resolver.cache = None
try:
wildcard = do_query_a(random_subdomain, resolver)
except Exception as e:
logger.log('DEBUG', e.args)
logger.log('ALERT', f'Multiple detection errors, so temporarily {domain} does not use wildcard dns record')
return False
else:
return wildcard
def gen_fuzz_subdomains(expression, rule):
"""
Generate subdomains based on fuzz mode
:param str expression: generate subdomains's expression
:param str rule: regexp rule
:return list subdomains: list of subdomains
"""
subdomains = list()
fuzz_count = exrex.count(rule)
if fuzz_count > 10000000:
logger.log('ALERT', f'The dictionary generated by this rule is too large：{fuzz_count} > 10000000')
logger.log('DEBUG', f'Dictionary size based on fuzz mode: {fuzz_count}')
for fuzz_string in exrex.generate(rule):
fuzz_string = fuzz_string.lower()
if not fuzz_string.isalnum():
continue
fuzz_domain = expression.replace('*', fuzz_string)
subdomains.append(fuzz_domain)
random_domain = random.choice(subdomains)
logger.log('ALERT', f'Please check whether {random_domain} is correct or not')
return subdomains
def gen_word_subdomains(expression, path):
"""
Generate subdomains based on word mode
:param str expression: generate subdomains's expression
:param str path: path of wordlist
:return list subdomains: list of subdomains
"""
subdomains = list()
with open(path, encoding='utf-8', errors='ignore') as fd:
for line in fd:
word = line.strip().lower()
if len(word) == 0:
continue
if not utils.is_subname(word):
continue
if word.startswith('.'):
word = word[1:]
if word.endswith('.'):
word = word[:-1]
subdomain = expression.replace('*', word)
subdomains.append(subdomain)
random_domain = random.choice(subdomains)
logger.log('DEBUG', f'Dictionary based on word mode size: {len(subdomains)}')
logger.log('ALERT', f'Please check whether {random_domain} is correct or not')
return subdomains
def query_domain_ns_a(ns_list):
logger.log('INFOR', f'Querying A record from authoritative name server: {ns_list} ')
if not isinstance(ns_list, list):
return list()
ns_ip_list = []
resolver = utils.dns_resolver()
for ns in ns_list:
try:
answer = resolver.query(ns, 'A')
except Exception as e:
logger.log('ERROR', e.args)
logger.log('ERROR', f'Query authoritative name server {ns} A record error')
continue
if answer:
for item in answer:
ns_ip_list.append(item.address)
logger.log('INFOR', f'Authoritative name server A record result: {ns_ip_list}')
return ns_ip_list
def query_domain_ns(domain):
logger.log('INFOR', f'Querying NS records of {domain}')
domain = utils.get_maindomain(domain)
resolver = utils.dns_resolver()
try:
answer = resolver.query(domain, 'NS')
except Exception as e:
logger.log('ERROR', e.args)
logger.log('ERROR', f'Querying NS records of {domain} error')
return list()
ns = [item.to_text() for item in answer]
logger.log('INFOR', f'{domain}\'s authoritative name server is {ns}')
return ns
@tenacity.retry(stop=tenacity.stop_after_attempt(2))
def get_wildcard_record(domain, resolver):
logger.log('INFOR', f'Query {domain} \'s wildcard dns record in authoritative name server')
try:
answer = resolver.query(domain, 'A')
# 如果查询随机域名A记录时抛出Timeout异常则重新查询
except Timeout as e:
logger.log('ALERT', f'Query timeout, retrying')
logger.log('DEBUG', e.args)
raise tenacity.TryAgain
except (NXDOMAIN, YXDOMAIN, NoAnswer, NoNameservers) as e:
logger.log('DEBUG', e.args)
logger.log('INFOR', f'{domain} dont have A record on authoritative name server')
return None, None
except Exception as e:
logger.log('ERROR', e.args)
logger.log('ERROR', f'Query {domain} wildcard dns record in authoritative name server error')
exit(1)
else:
if answer.rrset is None:
logger.log('DEBUG', f'No record of query result')
return None, None
name = answer.name
ip = {item.address for item in answer}
ttl = answer.ttl
logger.log('INFOR', f'{domain} results on authoritative name server: {name} '
f'IP: {ip} TTL: {ttl}')
return ip, ttl
def collect_wildcard_record(domain, authoritative_ns):
logger.log('INFOR', f'Collecting wildcard dns record for {domain}')
if not authoritative_ns:
return list(), int()
resolver = utils.dns_resolver()
resolver.nameservers = authoritative_ns
resolver.rotate = True
resolver.cache = None
ips = set()
ttl = int()
ips_stat = dict()
while True:
token = secrets.token_hex(4)
random_subdomain = f'{token}.{domain}'
try:
ip, ttl = get_wildcard_record(random_subdomain, resolver)
except Exception as e:
logger.log('DEBUG', e.args)
logger.log('ALERT', f'Multiple query errors, try to query a new random subdomain')
continue
if ip is None:
continue
ips = ips.union(ip)
# 统计每个泛解析IP出现次数
for addr in ip:
count = ips_stat.setdefault(addr, 0)
ips_stat[addr] = count + 1
# 筛选出出现次数2次以上的IP地址
addrs = list()
for addr, times in ips_stat.items():
if times >= 2:
addrs.append(addr)
# 大部分的IP地址出现次数大于2次停止收集泛解析IP记录
if len(addrs) / len(ips) >= 0.8:
break
logger.log('DEBUG', f'Collected the wildcard dns record of {domain}\n{ips}\n{ttl}')
return ips, ttl
def get_nameservers_path(enable_wildcard, ns_ip_list):
path = setting.brute_nameservers_path
if not enable_wildcard:
return path
if not ns_ip_list:
return path
path = setting.authoritative_dns_path
ns_data = '\n'.join(ns_ip_list)
utils.save_data(path, ns_data)
return path
def check_dict():
if not setting.enable_check_dict:
return
sec = setting.check_time
logger.log('ALERT', f'You have {sec} seconds to check whether the configuration is correct or not')
logger.log('ALERT', f'If you want to exit, please use `Ctrl + C`')
try:
time.sleep(sec)
except KeyboardInterrupt:
logger.log('INFOR', 'Due to configuration incorrect, exited')
exit(0)
def gen_records(items, records, subdomains, ip_times, wc_ips, wc_ttl):
qname = items.get('name')[:-1] # 去除最右边的`.`点号
reason = items.get('status')
resolver = items.get('resolver')
data = items.get('data')
answers = data.get('answers')
record = dict()
cname = list()
ips = list()
public = list()
times = list()
ttls = list()
is_valid_flags = list()
have_a_record = False
for answer in answers:
if answer.get('type') != 'A':
logger.log('TRACE', f'The query result of {qname} has no A record\n{answer}')
continue
logger.log('TRACE', f'The query result of {qname} no A record\n{answer}')
have_a_record = True
ttl = answer.get('ttl')
ttls.append(ttl)
cname.append(answer.get('name')[:-1]) # 去除最右边的`.`点号
ip = answer.get('data')
ips.append(ip)
public.append(utils.ip_is_public(ip))
num = ip_times.get(ip)
times.append(num)
isvalid, reason = is_valid_subdomain(ip, ttl, num, wc_ips, wc_ttl)
logger.log('TRACE', f'{ip} effective: {isvalid} reason: {reason}')
is_valid_flags.append(isvalid)
if not have_a_record:
logger.log('TRACE', f'All query result of {qname} no A record{answers}')
# 为了优化内存 只添加有A记录且通过判断的子域到记录中
if have_a_record and all(is_valid_flags):
record['resolve'] = 1
record['reason'] = reason
record['ttl'] = ttls
record['cname'] = cname
record['content'] = ips
record['public'] = public
record['times'] = times
record['resolver'] = resolver
records[qname] = record
subdomains.append(qname)
return records, subdomains
def stat_ip_times(result_paths):
logger.log('INFOR', f'Counting IP')
times = dict()
for result_path in result_paths:
logger.log('DEBUG', f'Reading {result_path}')
with open(result_path) as fd:
for line in fd:
line = line.strip()
try:
items = json.loads(line)
except Exception as e:
logger.log('ERROR', e.args)
logger.log('ERROR', f'Error parsing {result_path} line {line} Skip this line')
continue
status = items.get('status')
if status != 'NOERROR':
continue
data = items.get('data')
if 'answers' not in data:
continue
answers = data.get('answers')
for answer in answers:
if answer.get('type') == 'A':
ip = answer.get('data')
# 取值 如果是首次出现的IP集合 出现次数先赋值0
value = times.setdefault(ip, 0)
times[ip] = value + 1
return times
def deal_output(output_paths, ip_times, wildcard_ips, wildcard_ttl):
logger.log('INFOR', f'Processing result')
records = dict() # 用来记录所有域名解析数据
subdomains = list() # 用来保存所有通过有效性检查的子域
for output_path in output_paths:
logger.log('DEBUG', f'Processing {output_path}')
with open(output_path) as fd:
for line in fd:
line = line.strip()
try:
items = json.loads(line)
except Exception as e:
logger.log('ERROR', e.args)
logger.log('ERROR', f'Error parsing {line} Skip this line')
continue
qname = items.get('name')[:-1] # 去除最右边的`.`点号
status = items.get('status')
if status != 'NOERROR':
logger.log('TRACE', f'Found {qname}\'s result {status} while processing {line}')
continue
data = items.get('data')
if 'answers' not in data:
logger.log('TRACE', f'Processing {line}, {qname} no response')
continue
records, subdomains = gen_records(items, records, subdomains,
ip_times, wildcard_ips,
wildcard_ttl)
return records, subdomains
def check_by_compare(ip, ttl, wc_ips, wc_ttl):
"""
Use TTL comparison to detect wildcard dns record
:param set ip: A record IP address set
:param int ttl: A record TTL value
:param set wc_ips: wildcard dns record IP address set
:param int wc_ttl: wildcard dns record TTL value
:return bool: result
"""
# Reference：http://sh3ll.me/archives/201704041222.txt
if ip not in wc_ips:
return False # 子域IP不在泛解析IP集合则不是泛解析
if ttl != wc_ttl and ttl % 60 == 0 and wc_ttl % 60 == 0:
return False
return True
def check_ip_times(times):
"""
Use IP address times to determine wildcard or not
:param times: IP address times
:return bool: result
"""
if times > setting.ip_appear_maximum:
return True
return False
def is_valid_subdomain(ip, ttl, times, wc_ips, wc_ttl):
ip_blacklist = setting.brute_ip_blacklist
if ip in ip_blacklist: # 解析ip在黑名单ip则为非法子域
return 0, 'IP blacklist'
if all([wc_ips, wc_ttl]): # 有泛解析记录才进行对比
if check_by_compare(ip, ttl, wc_ips, wc_ttl):
return 0, 'IP wildcard'
if check_ip_times(times):
return 0, 'IP exceeded'
return 1, 'OK'
def save_brute_dict(dict_path, dict_set):
dict_data = '\n'.join(dict_set)
if not utils.save_data(dict_path, dict_data):
logger.log('FATAL', 'Saving dictionary error')
exit(1)
def delete_file(dict_path, output_paths):
if setting.delete_generated_dict:
dict_path.unlink()
if setting.delete_massdns_result:
for output_path in output_paths:
output_path.unlink()
class Brute(Module):
"""
OneForAll subdomain brute module
Example：
brute.py --target domain.com --word True run
brute.py --target ./domains.txt --word True run
brute.py --target domain.com --word True --process 1 run
brute.py --target domain.com --word True --wordlist subnames.txt run
brute.py --target domain.com --word True --recursive True --depth 2 run
brute.py --target d.com --fuzz True --place m.*.d.com --rule '[a-z]' run
Note:
--alive True/False Only export alive subdomains or not (default False)
--format rst/csv/tsv/json/yaml/html/jira/xls/xlsx/dbf/latex/ods (result format)
--path Result directory (default directory is ./results)
:param str target: One domain or File path of one domain per line (required)
:param int process: Number of processes (default 1)
:param int concurrent: Number of concurrent (default 10000)
:param bool word: Use word mode generate dictionary (default False)
:param str wordlist: Dictionary path used in word mode (default use ./config/setting.py)
:param bool recursive: Use recursion (default False)
:param int depth: Recursive depth (default 2)
:param str nextlist: Dictionary file path used by recursive (default use ./config/setting.py)
:param bool fuzz: Use fuzz mode generate dictionary (default False)
:param bool alive: Only export alive subdomains (default False)
:param str place: Designated fuzz position (required if use fuzz mode)
:param str rule: Specify the regexp rules used in fuzz mode (required if use fuzz mode)
:param bool export: Export the results (default True)
:param str format: Result format (default csv)
:param str path: Result directory (default None)
"""
def __init__(self, target, process=None, concurrent=None, word=False,
wordlist=None, recursive=False, depth=None, nextlist=None,
fuzz=False, place=None, rule=None, export=True, alive=True,
format='csv', path=None):
Module.__init__(self)
self.module = 'Brute'
self.source = 'Brute'
self.target = target
self.process_num = process or utils.get_process_num()
self.concurrent_num = concurrent or setting.brute_concurrent_num
self.word = word
self.wordlist = wordlist or setting.brute_wordlist_path
self.recursive_brute = recursive or setting.enable_recursive_brute
self.recursive_depth = depth or setting.brute_recursive_depth
self.recursive_nextlist = nextlist or setting.recursive_nextlist_path
self.fuzz = fuzz or setting.enable_fuzz
self.place = place or setting.fuzz_place
self.rule = rule or setting.fuzz_rule
self.export = export
self.alive = alive
self.format = format
self.path = path
self.bulk = False # 是否是批量爆破场景
self.domains = list() # 待爆破的所有域名集合
self.domain = str() # 当前正在进行爆破的域名
self.ips_times = dict() # IP集合出现次数
self.enable_wildcard = False # 当前域名是否使用泛解析
self.wildcard_check = setting.enable_wildcard_check
self.wildcard_deal = setting.enable_wildcard_deal
self.check_env = True
self.quite = False
def gen_brute_dict(self, domain):
logger.log('INFOR', f'Generating dictionary for {domain}')
dict_set = set()
# 如果domain不是self.subdomain 而是self.domain的子域则生成递归爆破字典
if self.place is None:
self.place = '*.' + domain
wordlist = self.wordlist
main_domain = self.register(domain)
if domain != main_domain:
wordlist = self.recursive_nextlist
if self.word:
word_subdomains = gen_word_subdomains(self.place, wordlist)
# set可以合并list
dict_set = dict_set.union(word_subdomains)
if self.fuzz:
fuzz_subdomains = gen_fuzz_subdomains(self.place, self.rule)
dict_set = dict_set.union(fuzz_subdomains)
# logger.log('INFOR', f'正在去重爆破字典')
# dict_set = utils.uniq_dict_list(dict_set)
count = len(dict_set)
logger.log('INFOR', f'Dictionary size: {count}')
if count > 10000000:
logger.log('ALERT', f'The dictionary generated is too large：{count} > 10000000')
return dict_set
def check_brute_params(self):
if not (self.word or self.fuzz):
logger.log('FATAL', f'Please specify at least one brute mode')
exit(1)
if len(self.domains) > 1:
self.bulk = True
if self.fuzz:
if self.place is None or self.rule is None:
logger.log('FATAL', f'No fuzz position or rules specified')
exit(1)
if self.bulk:
logger.log('FATAL', f'Cannot use fuzz mode in the bulk brute')
exit(1)
if self.recursive_brute:
logger.log('FATAL', f'Cannot use recursive brute in fuzz mode')
exit(1)
fuzz_count = self.place.count('*')
if fuzz_count < 1:
logger.log('FATAL', f'No fuzz position specified')
exit(1)
if fuzz_count > 1:
logger.log('FATAL', f'Only one fuzz position can be specified')
exit(1)
if self.domain not in self.place:
logger.log('FATAL', f'Incorrect domain for fuzz')
exit(1)
def main(self, domain):
start = time.time()
logger.log('INFOR', f'Blasting {domain} ')
massdns_dir = setting.third_party_dir.joinpath('massdns')
result_dir = setting.result_save_dir
temp_dir = result_dir.joinpath('temp')
utils.check_dir(temp_dir)
massdns_path = utils.get_massdns_path(massdns_dir)
timestring = utils.get_timestring()
wildcard_ips = list() # 泛解析IP列表
wildcard_ttl = int() # 泛解析TTL整型值
ns_list = query_domain_ns(self.domain)
ns_ip_list = query_domain_ns_a(ns_list) # DNS权威名称服务器对应A记录列表
self.enable_wildcard = detect_wildcard(domain, ns_ip_list)
if self.enable_wildcard:
wildcard_ips, wildcard_ttl = collect_wildcard_record(domain,
ns_ip_list)
ns_path = get_nameservers_path(self.enable_wildcard, ns_ip_list)
dict_set = self.gen_brute_dict(domain)
dict_len = len(dict_set)
dict_name = f'generated_subdomains_{domain}_{timestring}.txt'
dict_path = temp_dir.joinpath(dict_name)
save_brute_dict(dict_path, dict_set)
del dict_set
gc.collect()
output_name = f'resolved_result_{domain}_{timestring}.json'
output_path = temp_dir.joinpath(output_name)
log_path = result_dir.joinpath('massdns.log')
check_dict()
logger.log('INFOR', f'Running massdns to brute subdomains')
utils.call_massdns(massdns_path, dict_path, ns_path, output_path,
log_path, quiet_mode=self.quite,
process_num=self.process_num,
concurrent_num=self.concurrent_num)
output_paths = []
if self.process_num == 1:
output_paths.append(output_path)
else:
for i in range(self.process_num):
output_name = f'resolved_result_{domain}_{timestring}.json{i}'
output_path = temp_dir.joinpath(output_name)
output_paths.append(output_path)
ip_times = stat_ip_times(output_paths)
self.records, self.subdomains = deal_output(output_paths, ip_times,
wildcard_ips, wildcard_ttl)
delete_file(dict_path, output_paths)
end = time.time()
self.elapse = round(end - start, 1)
logger.log('INFOR', f'{self.source} module takes {self.elapse} seconds, '
f'found {len(self.subdomains)} subdomains of {domain}')
logger.log('DEBUG', f'{self.source} module found subdomains of {domain}:\n'
f'{self.subdomains}')
self.gen_result(brute=dict_len, valid=len(self.subdomains))
self.save_db()
return self.subdomains
def run(self):
logger.log('INFOR', f'Start runing {self.source} module')
if self.check_env:
utils.check_env()
self.domains = utils.get_domains(self.target)
all_subdomains = list()
for self.domain in self.domains:
self.check_brute_params()
if self.recursive_brute:
logger.log('INFOR', f'Start recursively brute the first layer subdomain of {self.domain}')
valid_subdomains = self.main(self.domain)
all_subdomains.extend(valid_subdomains)
# 递归爆破下一层的子域
# fuzz模式不使用递归爆破
if self.recursive_brute:
for layer_num in range(1, self.recursive_depth):
# 之前已经做过1层子域爆破 当前实际递归层数是layer+1
logger.log('INFOR', f'Start recursively brute'
f'the {layer_num + 1} layer subdomain of {self.domain}')
for subdomain in all_subdomains:
self.place = '*.' + subdomain
# 进行下一层子域爆破的限制条件
num = subdomain.count('.') - self.domain.count('.')
if num == layer_num:
valid_subdomains = self.main(subdomain)
all_subdomains.extend(valid_subdomains)
logger.log('INFOR', f'Finished {self.source} module\'s brute {self.domain}')
if not self.path:
name = f'{self.domain}_brute_result.{self.format}'
self.path = setting.result_save_dir.joinpath(name)
# 数据库导出
if self.export:
dbexport.export(self.domain,
alive=self.alive,
limit='resolve',
path=self.path,
format=self.format)
if __name__ == '__main__':
fire.Fire(Brute)