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Add DNS name resolution capability to ctfr #6

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Add DNS name resolution capability to ctfr #6

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2719e0d
Add DNS name resolution capability
Mar 8, 2018
ea51db9
Correct -r switch logic and enable proper keyboard interrupt handling
Mar 8, 2018
3ccd035
Fix file output so that all names are properly written
Mar 9, 2018
471c6e5
Add Domain Fronting checks from @rvrsh3ll FindFrontableDomains
May 7, 2018
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169 changes: 123 additions & 46 deletions ctfr.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,71 +2,148 @@
# -*- coding: utf-8 -*-
"""
------------------------------------------------------------------------------
CTFR - 04.03.18.02.10.00 - Sheila A. Berta (UnaPibaGeek)
CTFR - 04.03.18.02.10.00 - Sheila A. Berta (UnaPibaGeek)
------------------------------------------------------------------------------
"""

## # LIBRARIES # ##
import json
import requests
import dns.resolver
from struct import unpack
from socket import AF_INET, inet_pton

## # CONTEXT VARIABLES # ##
version = 1.1

## # MAIN FUNCTIONS # ##

def parse_args():
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-d', '--domain', type=str, required=True, help="Target domain.")
parser.add_argument('-o', '--output', type=str, help="Output file.")
return parser.parse_args()
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-d', '--domain', type=str, required=True, help="Target domain.")
parser.add_argument('-o', '--output', type=str, help="Output file.")
parser.add_argument('-r', '--resolve', action='store_true', help="Perform DNS Name Resolution.")

return parser.parse_args()

def banner():
global version
from pyfiglet import figlet_format
b = figlet_format(" CTFR") + \
''' Version {v} - Hey don't miss AXFR!
global version
from pyfiglet import figlet_format
b = figlet_format(" CTFR") + \
''' Version {v} - Hey don't miss AXFR!
Made by Sheila A. Berta (UnaPibaGeek)
'''.format(v=version)
print(b)

def save_subdomains(subdomain,output_file):
with open(output_file,"a") as f:
f.write(subdomain + '\n')
f.close()
'''.format(v=version)
print(b)

def save_subdomains(subdomains,output_file):
with open(output_file,"a") as f:
for subdomain in subdomains:
f.write(subdomain + '\n')

# Reference link: https://stackoverflow.com/questions/691045/how-do-you-determine-if-an-ip-address-is-private-in-python
# Determine if resolved IPs are private
def lookup(ip):
f = unpack('!I',inet_pton(AF_INET,ip))[0]
private = (
[ 2130706432, 4278190080 ], # 127.0.0.0, 255.0.0.0 http://tools.ietf.org/html/rfc3330
[ 3232235520, 4294901760 ], # 192.168.0.0, 255.255.0.0 http://tools.ietf.org/html/rfc1918
[ 2886729728, 4293918720 ], # 172.16.0.0, 255.240.0.0 http://tools.ietf.org/html/rfc1918
[ 167772160, 4278190080 ], # 10.0.0.0, 255.0.0.0 http://tools.ietf.org/html/rfc1918
)
for net in private:
if (f & net[1]) == net[0]:
return True
return False

def main():
banner()
args = parse_args()

subdomains = []
target = args.domain
output = args.output

req = requests.get("https://crt.sh/?q=%.{d}&output=json".format(d=target))

if req.status_code != 200:
print("[X] Error! Invalid domain or information not available!")
exit(1)

json_data = json.loads('[{}]'.format(req.text.replace('}{', '},{')))

for (key,value) in enumerate(json_data):
subdomains.append(value['name_value'])


print("\n[!] ---- TARGET: {d} ---- [!] \n".format(d=target))

subdomains = sorted(set(subdomains))

for subdomain in subdomains:
print("[-] {s}".format(s=subdomain))
if output is not None:
save_subdomains(subdomain,output)
banner()
args = parse_args()

subdomains = []
target = args.domain
output = args.output
resolve = args.resolve

req = requests.get("https://crt.sh/?q=%.{d}&output=json".format(d=target))

if req.status_code != 200:
print("[-] Error! Invalid domain or information not available!")
exit(1)

json_data = json.loads('[{}]'.format(req.text.replace('}{', '},{')))

for (key,value) in enumerate(json_data):
subdomains.append(value['name_value'])


print("\n[!] ---- TARGET: {d} ---- [!] \n".format(d=target))

subdomains = sorted(set(subdomains))

# Perform DNS resolution
if resolve is not False:
resolver = dns.resolver.Resolver()
for hostname in subdomains:
try:
dns.resolver.default_resolver = dns.resolver.Resolver(configure=False)
dns.resolver.default_resolver.nameservers = ['209.244.0.3', '209.244.0.4','64.6.64.6','64.6.65.6', '8.8.8.8', '8.8.4.4','84.200.69.80', '84.200.70.40', '8.26.56.26', '8.20.247.20', '208.67.222.222', '208.67.220.220','199.85.126.10', '199.85.127.10', '81.218.119.11', '209.88.198.133', '195.46.39.39', '195.46.39.40', '96.90.175.167', '193.183.98.154','208.76.50.50', '208.76.51.51', '216.146.35.35', '216.146.36.36', '37.235.1.174', '37.235.1.177', '198.101.242.72', '23.253.163.53', '77.88.8.8', '77.88.8.1', '91.239.100.100', '89.233.43.71', '74.82.42.42', '109.69.8.51']
query = resolver.query(hostname,"A")
ips = []
for ip in query:
ips.append(str(ip))
if lookup(str(ip)):
print("[!] Private IP address detected - {}:{} ".format(hostname,ip))

# Domain Fronting check
for i in query.response.answer:
for j in i.items:
target = j.to_text()
if not target.startswith("*"):
if 'cloudfront' in target:
print("{0}:CloundFront Frontable domain found ({1})").format(hostname,target)
elif 'appspot.com' in target:
print("{0}:Google Frontable domain found ({1})").format(hostname,target)
elif 'msecnd.net' in target:
print("{0}:Azure Frontable domain found ({1})").format(hostname,target)
elif 'aspnetcdn.com' in target:
print("{0}:Azure Frontable domain found ({1})").format(hostname,target)
elif 'azureedge.net' in target:
print("{0}:Azure Frontable domain found ({1})").format(hostname,target)
elif 'a248.e.akamai.net' in target:
print("{0}:Akamai Frontable domain found ({1})").format(hostname,target)
elif 'secure.footprint.net' in target:
print("{0}:Level 3 Frontable domain found ({1})").format(hostname,target)
elif 'cloudflare' in target:
print("{0}:Cloudflare Frontable domain found ({1})").format(hostname,target)
elif 'unbouncepages.com' in target:
print("{0}:Unbounce Frontable domain found ({1})").format(hostname,target)
elif 'amazonaws.com' in target:
print("{0}:Amazon AWS Frontable domain found ({1})").format(hostname,target)
elif 'fastly' in target:
print("{0}:Fastly Frontable domain found ({1})").format(hostname,target)

except KeyboardInterrupt:
print("[*] Caught Keyboard Interrupt! Exiting...\n")
exit(1)

except Exception as e:
ips = ''
# Join all returned IPs into string
ips = ','.join(ips)
print("{s}:{i}".format(s=hostname,i=ips))


# Print domains without performing DNS resolution
else:
for hostname in subdomains:
print("{s}".format(s=hostname))

# Save domains to output file
if output is not None:
save_subdomains(subdomains,output)

print("\n\n[!] Done. Have a nice day! ;).")


main()
3 changes: 2 additions & 1 deletion requirements.txt
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Original file line number Diff line number Diff line change
@@ -1,2 +1,3 @@
requests
pyfiglet
pyfiglet
dnspython