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nullinux.py
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nullinux.py
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#!/usr/bin/env python3
from __future__ import print_function
import sys
import re
import argparse
import datetime
from time import sleep
from ipaddress import IPv4Network
from threading import Thread, activeCount
if sys.version_info[0] < 3:
from commands import getoutput
else:
from subprocess import getoutput
class TargetParser():
# Condensed version of IPParser using only standard libraries
regex = {
'single': re.compile("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$"),
'range': re.compile("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}-\d{1,3}$"),
'cidr': re.compile("^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/\d{1,2}$"),
'dns': re.compile("^.+\.[a-z|A-Z]{2,}$")
}
def __init__(self):
self.hosts = []
def parse(self, target):
try:
self.controller(target)
return self.hosts
except Exception as e:
print_failure('Target Error: {}\n'.format(str(e)))
sys.exit(1)
def controller(self, target):
if target.endswith('.txt'):
self.fileParser(target)
elif re.match(self.regex['range'], target):
self.rangeParser(target)
elif re.match(self.regex['dns'], target):
self.hosts.append(target)
elif ',' in target:
self.multiParser(target)
else:
for ip in IPv4Network(target):
self.hosts.append(ip)
def fileParser(self, filename):
with open(filename, 'r') as f:
for line in f:
self.controller(line.strip())
def multiParser(self, target):
for t in target.strip().split(','):
self.controller(t)
def rangeParser(self, target):
a = target.split("-")
b = a[0].split(".")
for x in range(int(b[3]), int(a[1]) + 1):
tmp = b[0] + "." + b[1] + "." + b[2] + "." + str(x)
self.hosts.append(tmp)
class nullinux():
known_users = ['Administrator', 'Guest', 'krbtgt', 'root', 'bin']
domain_sid = ""
acquired_users = []
def __init__(self, username, password, verbose, output_file):
self.username = username
self.password = password
self.verbose = verbose
self.output_file = output_file
def enum_os(self, target):
cmd = "smbclient //{}/IPC$ -U {}%{} -t 1 -c exit".format(target,self.username, self.password)
for line in getoutput(cmd).splitlines():
if "Domain=" in line:
# OS info is no longer enumerated in newer Windows servers
print_success("{}: {}".format(target, line))
elif "NT_STATUS_LOGON_FAILURE" in line:
print_failure("{}: Authentication Failed".format(target))
return False
return True
def get_dom_sid(self, target):
print("\n\033[1;34m[*]\033[1;m Enumerating Domain Information for: {}".format(target))
cmd = "rpcclient -c lsaquery -U {}%{} {}".format(self.username, self.password, target)
for line in getoutput(cmd).splitlines():
if "Domain Name:" in line:
print_success(line)
elif "Domain Sid:" in line:
self.domain_sid = line.split(":")[1].strip()
print_success("Domain SID: {}".format(self.domain_sid))
if not self.domain_sid:
print_failure("Could not attain Domain SID")
def create_userfile(self):
openfile = open(self.output_file, 'a')
for user in self.acquired_users:
openfile.write('{}\n'.format(user))
openfile.close()
def enum_shares(self, target):
count = 0
acquired_shares = []
smbclient_types = ['Disk', 'IPC', 'Printer']
print("\n\033[1;34m[*]\033[1;m Enumerating Shares for: {}".format(target))
cmd = "smbclient -L {} -U {}%{} -t 2".format(target, self.username, self.password)
for line in getoutput(cmd).splitlines():
if count == 0: #Print Enum Share Heading
print(" {:26} {}".format("Shares", "Comments"))
print(" " + "-" * 43)
count += 1
for t in smbclient_types: #Check if output in known share types
if t in line:
try:
if 'IPC$' in line:
print(" \\\{}\{}".format(target, "IPC$"))
acquired_shares.append("IPC$")
else:
share = line.split(t)[0].strip()
comment = line.split(t)[1].strip()
print(" \\\{}\{:15} {}".format(target, share, comment))
acquired_shares.append(share)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
if acquired_shares:
#Enumerate dir of each new share
for s in acquired_shares:
self.enum_dir(target, s)
else:
print(" ")
print_failure("No Shares Detected")
def share_header(self, target, share):
print("\n ", end='')
print_status("Enumerating: \\\%s\%s" % (target, share))
def enum_dir(self, target, share):
header_count = 0
cmd = "smbclient //{}/\'{}\' -t 3 -U {}%{} -c dir".format(target, share, self.username, self.password)
for line in getoutput(cmd).splitlines():
if "NT_STATUS" in line or "_ACCESS_DENIED" in line:
if self.verbose:
if header_count == 0:
header_count += 1
self.share_header(target, share)
print(" ", end='')
print_failure(line)
elif "Domain=" in line or "blocks available" in line or "WARNING" in line or "failed:" in line or not line:
pass
else:
if header_count == 0:
header_count += 1
self.share_header(target, share)
print(" "+line)
def enum_querydispinfo(self, target):
print("\n\033[1;34m[*]\033[1;m Enumerating querydispinfo for: {}".format(target))
cmd = "rpcclient -c querydispinfo -U {}%{} {}".format(self.username, self.password, target)
for line in getoutput(cmd).splitlines():
try:
user_account = line.split("Name:")[0].split("Account:")[1].strip()
print(" " + user_account)
if user_account not in self.acquired_users:
self.acquired_users.append(user_account)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
def enum_enumdomusers(self, target):
print("\n\033[1;34m[*]\033[1;m Enumerating enumdomusers for: {}".format(target))
cmd = "rpcclient -c enumdomusers -U {}%{} {}".format(self.username, self.password, target)
for line in getoutput(cmd).splitlines():
try:
user_account = line.split("[")[1].split("]")[0].strip()
print(" "+user_account)
if user_account not in self.acquired_users:
self.acquired_users.append(user_account)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
def enum_lsa(self, target):
print("\n\033[1;34m[*]\033[1;m Enumerating LSA for: {}".format(target))
cmd = "rpcclient -c lsaenumsid -U {}%{} {}".format(self.username, self.password, target)
output = getoutput(cmd)
for line in output.splitlines():
try:
if "S-1-5-21" in line:
user_sid = "rpcclient -c 'lookupsids {}' -U {}%{} {}".format(line, self.username, self.password, target)
for x in getoutput(user_sid).splitlines():
user_account = x.split("\\")[1].split("(")[0].strip()
count = int(x.split("(")[1].split(")")[0].strip())
if count == 1:
if self.verbose:
print(" "+x)
else:
print(" "+user_account)
if user_account not in self.acquired_users:
self.acquired_users.append(user_account)
elif count > 1 and "*unknown*\*unknown*" not in line:
if self.verbose:
print(" {:35} (Network/LocalGroup)".format(x))
else:
print(" {:35} (Network/Local Group)".format(user_account))
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
def rid_cycling(self, target, ridrange, max_threads):
print("\n\033[1;34m[*]\033[1;m Performing RID Cycling for: {}".format(target))
if not self.domain_sid:
print_failure("RID Failed: Could not attain Domain SID")
return False
# Handle custom RID range input
try:
r = ridrange.split("-")
rid_range = list(range(int(r[0]), int(r[1])+1))
except:
print_failure("Error parsing custom RID range, reverting to default")
rid_range = list(range(500, 551))
for rid in rid_range:
try:
Thread(target=self.rid_thread, args=(rid,target,), daemon=True).start()
except:
pass
while activeCount() > max_threads:
sleep(0.001)
while activeCount() > 1:
sleep(0.001)
def rid_thread(self, rid, target):
cmd = "rpcclient -c \"lookupsids {}-{}\" -U {}%{} {}".format(self.domain_sid, rid, self.username, self.password,target)
for line in getoutput(cmd).splitlines():
if "S-1-5-21" in line:
# Split output to get username/group name
user_account = line.split("\\")[1].split("(")[0].strip()
count = int(line.split("(")[1].split(")")[0].strip())
if count == 1:
if self.verbose:
print(" " + line)
else:
print(" " + user_account)
if user_account not in self.acquired_users:
self.acquired_users.append(user_account)
elif count > 1 and "*unknown*\*unknown*" not in line:
if self.verbose:
print(" {:35} (Network/LocalGroup)".format(line))
else:
print(" {:35} (Network/LocalGroup)".format(user_account))
def enum_known_users(self, target):
print("\n\033[1;34m[*]\033[1;m Testing {} for Known Users".format(target))
for user in self.known_users:
cmd = "rpcclient -c \"lookupnames {}\" -U {}%{} {}".format(user, self.username, self.password, target)
for line in getoutput(cmd).splitlines():
if "S-1-5" in line:
try:
user_account = line.split(" ")[0].strip()
if self.verbose:
print(" " + line)
else:
print(" " + user_account)
if user_account not in self.acquired_users and int(line.split("User:")[1]) == 1:
self.acquired_users.append(user_account)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
def enum_dom_groups(self, target):
print("\n\033[1;34m[*]\033[1;m Enumerating Group Memberships for: {}".format(target))
cmd = "rpcclient -c enumdomgroups -U {}%{} {}".format(self.username, self.password, target)
for line in getoutput(cmd).splitlines():
if "rid:" in line:
try:
group = line.split("[")[1].split("]")[0].strip()
print_success("Group: %s" % (group))
self.enum_group_mem(target, group)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
def enum_group_mem(self, target, group):
cmd = "net rpc group members \'{}\' -U {}%{} -I {}".format(group, self.username, self.password, target)
for line in getoutput(cmd).splitlines():
try:
user_account = line.split("\\")[1].strip()
print(" " + user_account)
if user_account not in self.acquired_users:
self.acquired_users.append(user_account)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)
except:
pass
def print_success(msg):
print('\033[1;32m[+]\033[0m {}'.format(msg))
def print_status(msg):
print('\033[1;34m[*]\033[0m {}'.format(msg))
def print_failure(msg):
print('\033[1;31m[-]\033[0m {}'.format(msg))
def time_stamp():
return datetime.datetime.now().strftime('%m-%d-%Y %H:%M')
def nullinux_enum(args, scan, target):
scan.enum_os(target)
if args.users:
scan.enum_shares(target)
if args.shares:
if not scan.domain_sid:
scan.get_dom_sid(target)
scan.enum_querydispinfo(target)
scan.enum_enumdomusers(target)
if not args.quick:
scan.enum_lsa(target)
scan.rid_cycling(target, args.rid_range, args.max_threads)
scan.enum_known_users(target)
scan.enum_dom_groups(target)
def main(args):
print("\n Starting nullinux v{} | {}\n\n".format(version, time_stamp()))
scan = nullinux('\"{}\"'.format(args.username), '\"{}\"'.format(args.password), args.verbose, args.output_file)
for t in args.target:
try:
if args.rid_only:
scan.get_dom_sid(t)
scan.rid_cycling(t, args.rid_range, args.max_threads)
else:
nullinux_enum(args, scan, t)
except Exception as e:
print("\n[*] Main Error: {}\n\n".format(e))
if args.users:
print("\n\033[1;34m[*]\033[1;m {} unique user(s) identified".format(len(scan.acquired_users)))
if scan.acquired_users:
print("\033[1;32m[+]\033[1;m Writing users to file: {}\n".format(args.output_file))
scan.create_userfile()
if __name__ == '__main__':
try:
version = '5.5.0dev'
args = argparse.ArgumentParser(description=("""
nullinux | v{0}
-----------------------------------
SMB null-session enumeration tool to gather OS,
user, share, and domain information.
usage:
nullinux -users -quick DC1.demo.local,10.0.1.1
nullinux -rid -range 500-600 10.0.0.1
nullinux -shares -U 'Domain\\User' -P 'Password1' 10.0.0.1""").format(version), formatter_class=argparse.RawTextHelpFormatter, usage=argparse.SUPPRESS)
args.add_argument('-v', dest="verbose", action='store_true', help="Verbose output")
args.add_argument('-o', dest="output_file", type=str, default="./nullinux_users.txt", help="Output users to the specified file")
auth = args.add_argument_group("Authentication")
auth.add_argument('-u', '-U', dest='username', type=str, default="", help='Username')
auth.add_argument('-p', '-P', dest='password', type=str, default="", help='Password')
enum = args.add_argument_group("Enumeration")
enum.add_argument('-shares', dest="shares", action='store_false', help="Enumerate shares only")
enum.add_argument('-users', dest="users", action='store_false', help="Enumerate users only")
enum.add_argument('-q', '-quick', dest="quick", action='store_true', help="Fast user enumeration")
enum.add_argument('-r', '-rid', dest="rid_only", action='store_true', help="Perform RID cycling only")
enum.add_argument('-range', dest='rid_range', type=str, default="500-550", help='Set Custom RID cycling range (Default: \'500-550\')')
enum.add_argument('-T', dest='max_threads', type=int, default=15, help='Max threads for RID cycling (Default: 15)')
args.add_argument(dest='target', nargs='+', help='Target server')
args = args.parse_args()
args.target = TargetParser().parse(args.target[0])
main(args)
except KeyboardInterrupt:
print("\n[!] Key Event Detected...\n\n")
sys.exit(0)