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#!/usr/bin/python -tt
# gxfr replicates dns zone transfers by enumerating subdomains using advanced search engine queries and conducting dns lookups.
# By Tim Tomes (LaNMaSteR53)
# Available for download at http://LaNMaSteR53.com or http://code.google.com/p/gxfr/
import sys, os.path, urllib, urllib2, re, time, socket, random, socket
def help():
print """ Syntax: ./gxfr.py domain [options]
-h, --help this screen
-v enable verbose mode
-t [num of seconds] set number of seconds to wait between queries (default=15)
-q [max num of queries] restrict to maximum number of queries (default=0, indefinite)
--dns-lookup enable dns lookups of all subdomains
--proxy [file|ip:port|-] use a proxy or list of open proxies to send queries (@random w/list)
- [file] must consist of 1 or more ip:port pairs
- replace filename with '-' (dash) to accept stdin
--user-agent ['string'] set custom user-agent string
--timeout [seconds] set socket timeout (default=system default)
--csv [file]
Examples:
$ ./gxfr.py foxnews.com --dns-lookup -v
$ ./gxfr.py foxnews.com --dns-lookup --proxy open_proxies.txt --timeout 10
$ ./gxfr.py foxnews.com --dns-lookup -t 5 -q 5 -v --proxy 127.0.0.1:8080
$ curl http://rmccurdy.com/scripts/proxy/good.txt | ./gxfr.py website.com -v -t 3 --proxy -
"""
sys.exit(2)
if len(sys.argv) < 2:
help()
if '-h' in sys.argv or '--help' in sys.argv:
help()
# declare vars and process arguments
query_cnt = 0
csvname = False
domain = sys.argv[1]
sys.argv = sys.argv[2:]
lookup = False
encrypt = True
base_url = 'https://www.google.com'
base_uri = '/m/search?'
base_query = 'site:' + domain
pattern = '>([\.\w-]*)\.%s.+?<' % (domain)
proxy = False
user_agent = 'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; FDM; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 1.1.4322)'
verbose = False
secs = 15
max_queries = 10 # default = 10 queries
# process command line arguments
if len(sys.argv) > 0:
if '--dns-lookup' in sys.argv:
lookup = True
if '--csv' in sys.argv:
csvname = sys.argv[sys.argv.index('--csv') + 1]
if '--proxy' in sys.argv:
proxy = True
filename = sys.argv[sys.argv.index('--proxy') + 1]
if filename == '-':
proxies = sys.stdin.read().split()
elif os.path.exists(filename):
content = open(filename).read()
proxies = re.findall('\d+\.\d+\.\d+\.\d+:\d+', content)
elif re.match(r'^\d+\.\d+\.\d+\.\d+:\d+$', filename):
proxies = [filename]
else:
help()
if '--timeout' in sys.argv:
timeout = int(sys.argv[sys.argv.index('--timeout') + 1])
socket.setdefaulttimeout(timeout)
if '--user-agent' in sys.argv:
user_agent = sys.argv[sys.argv.index('--user-agent') + 1]
if '-v' in sys.argv:
verbose = True
if '-t' in sys.argv:
secs = int(sys.argv[sys.argv.index('-t') + 1])
if '-q' in sys.argv:
max_queries = int(sys.argv[sys.argv.index('-q') + 1])
subs = []
new = True
page = 0
# --begin--
print '[-] domain:', domain
print '[-] user-agent:', user_agent
# execute search engine queries and scrape results storing subdomains in a list
print '[-] querying search engine, please wait...'
# loop until no new subdomains are found
while new == True:
try:
query = ''
# build query based on results of previous results
for sub in subs:
query += ' -site:%s.%s' % (sub, domain)
full_query = base_query + query
start_param = '&start=%s' % (str(page*10))
query_param = 'q=%s' % (urllib.quote_plus(full_query))
if len(base_uri) + len(query_param) + len(start_param) < 2048:
last_query_param = query_param
params = query_param + start_param
else:
params = last_query_param[:2047-len(start_param)-len(base_uri)] + start_param
full_url = base_url + base_uri + params
# note: query character limit is passive in mobile, but seems to be ~794
# note: query character limit seems to be 852 for desktop queries
# note: typical URI max length is 2048 (starts after top level domain)
if verbose: print '[+] using query: %s...' % (full_url)
# build web request and submit query
request = urllib2.Request(full_url)
# spoof user-agent string
request.add_header('User-Agent', user_agent)
# if proxy is enabled, use the correct handler
if proxy == True:
# validate proxies at runtime
while True:
try:
# select a proxy from list at random
num = random.randint(0,len(proxies)-1)
host = proxies[num]
opener = urllib2.build_opener(urllib2.ProxyHandler({'http': host}))
if verbose: print '[+] sending query to', host
# send query to proxy server
result = opener.open(request).read()
# exit while loop if successful
break
except Exception as inst:
print '[!] %s failed: %s' % (host, inst)
if len(proxies) == 1:
# exit of no proxy servers from list are valid
print '[-] valid proxy server not found'
sys.exit(2)
else:
# remove host from list of proxies and try again
del proxies[num]
else:
opener = urllib2.build_opener(urllib2.HTTPHandler(), urllib2.HTTPSHandler())
# send query to search engine
try:
result = opener.open(request).read()
except Exception as inst:
print '[!] {0}'.format(inst)
if str(inst).index('503') != -1: print '[!] possible shun: use --proxy or find something else to do for 24 hours :)'
sys.exit(2)
if not verbose: sys.stdout.write('.'); sys.stdout.flush()
#if not verbose: sys.stdout.write('\n'); sys.stdout.flush()
# iterate query count
query_cnt += 1
sites = re.findall(pattern, result)
# create a uniq list
sites = list(set(sites))
new = False
# add subdomain to list if not already exists
for site in sites:
if site not in subs:
if verbose: print '[!] subdomain found:', site
subs.append(site)
new = True
# exit if maximum number of queries has been made
if query_cnt == max_queries:
print '[-] maximum number of queries made...'
break
# start going through all pages if querysize is maxed out
if new == False:
# exit if all subdomains have been found
if not 'Next page' in result:
#import pdb; pdb.set_trace() # curl to stdin breaks pdb
print '[-] all available subdomains found...'
break
else:
page += 1
new = True
if verbose: print '[+] no new subdomains found on page. jumping to result %d.' % (page*10)
# sleep script to avoid lock-out
if verbose: print '[+] sleeping to avoid lock-out...'
time.sleep(secs)
except KeyboardInterrupt:
# catch keyboard interrupt and gracefull complete script
break
# print list of subdomains
print '[-] successful queries made:', str(query_cnt)
if verbose:
# rebuild and display final query if in verbose mode
#final_query = ''
#for sub in subs:
# final_query += '+-site:%s.%s' % (sub, domain)
#print '[+] final query string: %sstart=%s&%s%s' % (base_url, str(page*10), base_query, query)
print '[+] final query string: %s' % (full_url)
print ' '
print '[subdomains] -', str(len(subs))
csvwriter = False
try:
if csvname:
import csv
csvwriter = csv.writer(open(csvname,'wb'))
except:
print "[!] Cannot open CSV"
for sub in subs:
dom = '%s.%s' % (sub, domain )
hostname,aliases,ips = socket.gethostbyname_ex(dom)
#print hostname,aliases,ip
print dom,",".join(ips)
try:
line = [dom] + ips
csvwriter.writerow([dom] + ips)
except: pass
# conduct dns lookup if argument is present
if lookup == True:
print ' '
print '[-] querying dns, please wait...'
dict = {}
# create a dictionary where the subdomain is the key and a list of all associated ips is the value
for sub in subs:
sub = '%s.%s' % (sub, domain)
if verbose: print '[+] querying dns for %s...' % (sub)
# dns query and dictionary assignment
try:
dict[sub] = list(set([item[4][0] for item in socket.getaddrinfo(sub, 80)]))
except socket.gaierror:
# dns lookup failure
dict[sub] = list(set(['no entry']))
# print table of subdomains and ips
print ' '
print '[ip]'.ljust(16, ' ') + '[subdomain]'
for key in dict.keys():
for ip in dict[key]:
print ip.ljust(16, ' ') + key
# --end--
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