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net.py
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net.py
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#!/usr/bin/env python
# Impacket - Collection of Python classes for working with network protocols.
#
# Copyright Fortra, LLC and its affiliated companies
#
# All rights reserved.
#
# This software is provided under a slightly modified version
# of the Apache Software License. See the accompanying LICENSE file
# for more information.
#
# Description:
# Impacket alternative for windows net.exe commandline utility.
# Thanks to rpc protocol, the special feature of this tool is
# making net.exe functionalities available from remote computer.
#
# e.g:
# python net.py Administrator:password@targetMachine localgroup
# python net.py Administrator:password@targetMachine user
# python net.py Administrator:password@targetMachine group
# python net.py Administrator:password@targetMachine computer
# python net.py Administrator:password@targetMachine localgroup -name Administrators
# python net.py Administrator:password@targetMachine user -name Administrator
# python net.py Administrator:password@targetMachine group -name "Domain Admins"
# python net.py Administrator:password@targetMachine computer -name DC$
# python net.py Administrator:password@targetMachine group -name "Domain Admins" -join EvilUs3r
#
# Author:
# Alex Romero (@NtAlexio2)
#
# Reference for:
# [MS-SAMR]
#
import sys
import argparse
import logging
from datetime import datetime
from impacket import version
from impacket.examples import logger
from impacket.examples.utils import parse_target
from impacket.dcerpc.v5 import transport, samr, lsad, lsat
from impacket.smbconnection import SMBConnection
class LsaTranslator:
def __init__(self, smbConnection):
self._smbConnection = smbConnection
self.__stringBindingSamr = r'ncacn_np:445[\pipe\lsarpc]'
self._lsat_dce = None
self.Connect()
def Connect(self):
rpc = transport.DCERPCTransportFactory(self.__stringBindingSamr)
rpc.set_smb_connection(self._smbConnection)
self._lsat_dce = rpc.get_dce_rpc()
self._lsat_dce.connect()
self._lsat_dce.bind(lsat.MSRPC_UUID_LSAT)
def LookupName(self, name):
policyHandle = lsad.hLsarOpenPolicy2(self._lsat_dce)['PolicyHandle']
resp = lsat.hLsarLookupNames3(self._lsat_dce, policyHandle, (name, ))
lsad.hLsarClose(self._lsat_dce, policyHandle)
return resp['TranslatedSids']['Sids'][0]['Sid']
def LookupSids(self, sid_list):
policyHandle = lsad.hLsarOpenPolicy2(self._lsat_dce)['PolicyHandle']
resp = lsat.hLsarLookupSids2(self._lsat_dce, policyHandle, sid_list)
lsad.hLsarClose(self._lsat_dce, policyHandle)
return resp['TranslatedNames']['Names']
class SamrObject:
def __init__(self, smbConnection):
self._smbConnection = smbConnection
self.__stringBindingSamr = r'ncacn_np:445[\pipe\samr]'
self._dce = None
self._domain_handle = None
self._translator = None
self._connect()
def _connect(self):
rpc = transport.DCERPCTransportFactory(self.__stringBindingSamr)
rpc.set_smb_connection(self._smbConnection)
self._dce = rpc.get_dce_rpc()
self._dce.connect()
self._dce.bind(samr.MSRPC_UUID_SAMR)
def _get_user_sid(self, username):
if self._translator is None:
self._translator = LsaTranslator(self._smbConnection)
return self._translator.LookupName(username)
def _resolve_sid(self, sid_list):
if self._translator is None:
self._translator = LsaTranslator(self._smbConnection)
return self._translator.LookupSids(sid_list)
def _get_object_rid(self, domain_handle, object_name):
response = samr.hSamrLookupNamesInDomain(self._dce, domain_handle, (object_name,))
object_id = response['RelativeIds']['Element'][0]['Data']
return object_id
def _get_user_handle(self, domain_handle, username):
user_rid = self._get_object_rid(domain_handle, username)
response = samr.hSamrOpenUser(self._dce, domain_handle, samr.MAXIMUM_ALLOWED, user_rid)
return response['UserHandle']
def _get_group_handle(self, domain_handle, alias_name):
group_rid = self._get_object_rid(domain_handle, alias_name)
response = samr.hSamrOpenGroup(self._dce, domain_handle, samr.MAXIMUM_ALLOWED, group_rid)
return response['GroupHandle']
def _get_alias_handle(self, domain_handle, alias_name):
alias_rid = self._get_object_rid(domain_handle, alias_name)
response = samr.hSamrOpenAlias(self._dce, domain_handle, samr.MAXIMUM_ALLOWED, alias_rid)
return response['AliasHandle']
def _open_domain(self, builtin=False):
if self._domain_handle is None:
self._domain_handle = self.__get_domain_handle(builtin)
return self._domain_handle
def _close_domain(self):
if self._domain_handle != None:
samr.hSamrCloseHandle(self._dce, self._domain_handle)
self._domain_handle = None
def __get_domain_handle(self, builtin=False):
index = 1 if builtin else 0
server_handle = samr.hSamrConnect(self._dce)['ServerHandle']
domain_name = samr.hSamrEnumerateDomainsInSamServer(self._dce, server_handle)['Buffer']['Buffer'][index]['Name']
domain_id = samr.hSamrLookupDomainInSamServer(self._dce, server_handle, domain_name)['DomainId']
domain_handle = samr.hSamrOpenDomain(self._dce, server_handle, domainId=domain_id)['DomainHandle']
return domain_handle
class User(SamrObject):
def __init__(self, smbConnection):
super().__init__(smbConnection)
self._create_account_type = samr.USER_NORMAL_ACCOUNT
self._enum_account_type = samr.USER_NORMAL_ACCOUNT
def Enumerate(self):
domain_handle = self._open_domain()
try:
response = samr.hSamrEnumerateUsersInDomain(self._dce, domain_handle, self._enum_account_type)
for item in response['Buffer']['Buffer']:
yield item
except samr.DCERPCSessionError as e:
if str(e).find('STATUS_MORE_ENTRIES') < 0:
raise
finally:
self._close_domain()
def Query(self, name):
domain_handle = self._open_domain(False)
try:
user_handle = self._get_user_handle(domain_handle, name)
response = samr.hSamrQueryInformationUser2(self._dce, user_handle, samr.USER_INFORMATION_CLASS.UserAllInformation)
response = response['Buffer']['All']
# Get groups that user is member of
groups = samr.hSamrGetGroupsForUser(self._dce, user_handle)['Groups']['Groups']
group_id_list = list(map(lambda g: g['RelativeId'], groups))
sidArray = samr.SAMPR_PSID_ARRAY()
for gid in group_id_list:
group_handle = samr.hSamrOpenGroup(self._dce, domain_handle, groupId=gid)['GroupHandle']
group_sid = samr.hSamrRidToSid(self._dce, group_handle, gid)['Sid']
si = samr.PSAMPR_SID_INFORMATION()
si['SidPointer'] = group_sid
sidArray['Sids'].append(si)
samr.hSamrCloseHandle(self._dce, group_handle)
global_lookup_ids = samr.hSamrLookupIdsInDomain(self._dce, domain_handle, group_id_list)
response.fields['GlobalGroups'] = list(map(lambda a: a['Data'], global_lookup_ids['Names']['Element']))
self._close_domain()
domain_handle = self._open_domain(True)
alias_membership = samr.hSamrGetAliasMembership(self._dce, domain_handle, sidArray)
alias_id_list = list(map(lambda a: a['Data'], alias_membership['Membership']['Element']))
local_lookup_ids = samr.hSamrLookupIdsInDomain(self._dce, domain_handle, alias_id_list)
response.fields['LocalGroups'] = list(map(lambda a: a['Data'], local_lookup_ids['Names']['Element']))
return response
except samr.DCERPCSessionError as e:
if str(e).find('STATUS_MORE_ENTRIES') < 0:
raise
finally:
self._close_domain()
def Create(self, name, new_password, new_nt_hash=''):
domain_handle = self._open_domain()
user_handle = samr.hSamrCreateUser2InDomain(self._dce, domain_handle, name, self._create_account_type, samr.USER_ALL_ACCESS)['UserHandle']
try:
samr.hSamrSetNTInternal1(self._dce, user_handle, new_password, new_nt_hash)
except samr.DCERPCSessionError as e:
samr.hSamrDeleteUser(self._dce, user_handle)
raise
else:
self._hEnableAccount(user_handle)
finally:
self._close_domain()
def Remove(self, name):
domain_handle = self._open_domain()
try:
user_handle = self._get_user_handle(domain_handle, name)
samr.hSamrDeleteUser(self._dce, user_handle)
finally:
self._close_domain()
def _hEnableAccount(self, user_handle):
buffer = samr.SAMPR_USER_INFO_BUFFER()
buffer['tag'] = samr.USER_INFORMATION_CLASS.UserControlInformation
buffer['Control']['UserAccountControl'] = samr.USER_ALL_ADMINCOMMENT
samr.hSamrSetInformationUser2(self._dce, user_handle, buffer)
class Computer(User):
def __init__(self, smbConnection):
super().__init__(smbConnection)
self._create_account_type = samr.USER_WORKSTATION_TRUST_ACCOUNT
self._enum_account_type = samr.USER_WORKSTATION_TRUST_ACCOUNT | samr.USER_SERVER_TRUST_ACCOUNT
class Group(SamrObject):
def Enumerate(self):
domain_handle = self._open_domain()
try:
response = samr.hSamrEnumerateGroupsInDomain(self._dce, domain_handle)
for item in response['Buffer']['Buffer']:
yield item
except samr.DCERPCSessionError as e:
if str(e).find('STATUS_MORE_ENTRIES') < 0:
raise
finally:
self._close_domain()
def Query(self, group_name):
domain_handle = self._open_domain()
try:
group_handle = self._get_group_handle(domain_handle, group_name)
response = samr.hSamrGetMembersInGroup(self._dce, group_handle)
response = samr.hSamrLookupIdsInDomain(self._dce, domain_handle, list(map(lambda a: a['Data'], response['Members']['Members'])))
return list(map(lambda a: a['Data'], response['Names']['Element']))
finally:
self._close_domain()
def Join(self, group_name, username):
domain_handle = self._open_domain()
try:
group_handle = self._get_group_handle(domain_handle, group_name)
user_rid = self._get_object_rid(domain_handle, username)
samr.hSamrAddMemberToGroup(self._dce, group_handle, user_rid, samr.SE_GROUP_ENABLED_BY_DEFAULT)
finally:
self._close_domain()
def UnJoin(self, group_name, username):
domain_handle = self._open_domain()
try:
group_handle = self._get_group_handle(domain_handle, group_name)
user_rid = self._get_object_rid(domain_handle, username)
samr.hSamrRemoveMemberFromGroup(self._dce, group_handle, user_rid)
finally:
self._close_domain()
class Localgroup(Group):
def Enumerate(self):
domain_handle = self._open_domain(True)
try:
response = samr.hSamrEnumerateAliasesInDomain(self._dce, domain_handle)
for item in response['Buffer']['Buffer']:
yield item
except samr.DCERPCSessionError as e:
if str(e).find('STATUS_MORE_ENTRIES') < 0:
raise
finally:
self._close_domain()
def Query(self, group_name):
domain_handle = self._open_domain(True)
try:
alias_handle = self._get_alias_handle(domain_handle, group_name)
response = samr.hSamrGetMembersInAlias(self._dce, alias_handle)
response = self._resolve_sid(list(map(lambda s: s['Data']['SidPointer'].formatCanonical(), response['Members']['Sids'])))
return list(map(lambda x: x['Name'], response))
finally:
self._close_domain()
def Join(self, group_name, username):
domain_handle = self._open_domain(True)
try:
alias_handle = self._get_alias_handle(domain_handle, group_name)
user_sid = self._get_user_sid(username)
samr.hSamrAddMemberToAlias(self._dce, alias_handle, user_sid)
finally:
self._close_domain()
def UnJoin(self, group_name, username):
domain_handle = self._open_domain(True)
try:
alias_handle = self._get_alias_handle(domain_handle, group_name)
user_sid = self._get_user_sid(username)
samr.hSamrRemoveMemberFromAlias(self._dce, alias_handle, user_sid)
finally:
self._close_domain()
class Net:
def __init__(self, domain, username, password, options):
self.__domain = domain
self.__username = username
self.__password = password
self.__options = options
self.__action = options.entry.lower()
self.__lmhash = ''
self.__nthash = ''
self.__aesKey = options.aesKey
self.__doKerberos = options.k
self.__kdcHost = options.dc_ip
self.__smbConnection = None
if options.hashes is not None:
self.__lmhash, self.__nthash = options.hashes.split(':')
def connect(self, remoteName, remoteHost):
self.__smbConnection = SMBConnection(remoteName, remoteHost, sess_port=int(self.__options.port))
if self.__doKerberos:
self.__smbConnection.kerberosLogin(self.__username, self.__password, self.__domain, self.__lmhash,
self.__nthash, self.__aesKey, self.__kdcHost)
else:
self.__smbConnection.login(self.__username, self.__password, self.__domain, self.__lmhash, self.__nthash)
def disconnect(self):
self.__smbConnection.close()
self.__smbConnection = None
def run(self, remoteName, remoteHost):
self.connect(remoteName, remoteHost)
actionClass = self.__get_action_class(self.__action)
actionObject = actionClass(self.__smbConnection)
if self.__is_option_present(self.__options, 'create'):
print("[*] Creating {} account '{}'".format(self.__action, self.__options.create))
actionObject.Create(self.__options.create, self.__options.newPasswd)
print("[+] {} account created succesfully: {}:{}".format(self.__action, self.__options.create, self.__options.newPasswd))
elif self.__is_option_present(self.__options, 'remove'):
print("[*] Deleting {} account '{}'".format(self.__action, self.__options.remove))
actionObject.Remove(self.__options.remove)
print("[+] {} account deleted succesfully!".format(self.__action))
elif self.__is_option_present(self.__options, 'join'):
print("[*] Adding user account '{}' to group '{}'".format(self.__options.join,self.__options.name))
actionObject.Join(self.__options.name, self.__options.join)
print("[+] User account added to {} succesfully!".format(self.__options.name))
elif self.__is_option_present(self.__options, 'unjoin'):
print("[*] Removing user account '{}' from group '{}'".format(self.__options.unjoin,self.__options.name))
actionObject.UnJoin(self.__options.name, self.__options.unjoin)
print("[+] User account removed from {} succesfully!".format(self.__options.name))
elif self.__is_option_present(self.__options, 'name'):
info = actionObject.Query(self.__options.name)
if type(info) == list:
i = 1
for member in info:
print(" {0}. {1}".format(i, member))
i += 1
else:
print("User name".ljust(30), info['UserName'])
print("Full name".ljust(30), info['FullName'])
print("Comment".ljust(30), info['AdminComment'])
print("User's comment".ljust(30), info['UserComment'])
print("Country/region code".ljust(30), "000 (System Default)" if info['CountryCode'] == 0 else info['CountryCode'])
print("Account active".ljust(30), self.__b2s(info['UserAccountControl'] & samr.USER_ACCOUNT_DISABLED != samr.USER_ACCOUNT_DISABLED))
print("Account expires".ljust(30), self.__get_time_string(info['AccountExpires']))
print('')
print("Password last set".ljust(30), self.__get_time_string(info['PasswordLastSet']))
print("Password expires".ljust(30), self.__get_time_string(info['PasswordMustChange']))
print("Password changeable".ljust(30), self.__get_time_string(info['PasswordCanChange']))
print("Password required".ljust(30), self.__b2s(info['WhichFields'] & samr.USER_PASSWORD_NOT_REQUIRED == samr.USER_PASSWORD_NOT_REQUIRED))
print("User may change password".ljust(30), self.__b2s(info['WhichFields'] & samr.UF_PASSWD_CANT_CHANGE == samr.UF_PASSWD_CANT_CHANGE))
print('')
print("Workstations allowed".ljust(30), "All" if not info['WorkStations'] else info['WorkStations'])
print("Logon script".ljust(30), info['ScriptPath'])
print("User profile".ljust(30), info['ProfilePath'])
print("Home directory".ljust(30), info['HomeDirectory'])
print("Last logon".ljust(30), self.__get_time_string(info['LastLogon']))
print("Logon count".ljust(30), info['LogonCount'])
print('')
print("Logon hours allowed".ljust(30), self.__format_logon_hours(info['LogonHours']['LogonHours']))
print('')
print("Local Group Memberships")
for group in info['LocalGroups']:
print(" * {}".format(group))
print('')
print("Global Group memberships")
for group in info['GlobalGroups']:
print(" * {}".format(group))
else:
print("[*] Enumerating {}s ..".format(self.__action))
i = 1
for object in actionObject.Enumerate():
messae = " {0}. {1}".format(i, object['Name'])
if self.__options.debug:
messae += " ({0})".format(object['RelativeId'])
print(messae)
i += 1
self.disconnect()
def __getUnixTime(self, t):
t -= 116444736000000000
t /= 10000000
return t
def __get_time_string(self, large_integer):
time = (large_integer['HighPart'] << 32) + large_integer['LowPart']
if time == 0 or time == 0x7FFFFFFFFFFFFFFF:
time = 'Never'
else:
time = datetime.fromtimestamp(self.__getUnixTime(time))
time = time.strftime("%m/%d/%Y %H:%M:%S %p")
return time
def __format_logon_hours(self, s):
logon_hours = ''.join(map(lambda b: b.hex(), s))
if logon_hours == ('f' * 42):
logon_hours = "All"
return logon_hours
def __b2s(self, b):
return "Yes" if b else "No"
def __get_action_class(self, action):
return getattr(sys.modules[__name__], action.capitalize())
def __is_option_present(self, options, option):
return hasattr(options, option) and getattr(options, option)
if __name__ == '__main__':
print(version.BANNER)
logger.init()
parser = argparse.ArgumentParser(add_help = True, description = "SAMR rpc client implementation.")
parser.add_argument('target', action='store', help='[[domain/]username[:password]@]<targetName or address>')
parser.add_argument('-debug', action='store_true', help='Turn DEBUG output ON')
subparsers = parser.add_subparsers(help='An account entry name', dest='entry', required=True)
user_parser = subparsers.add_parser('user', help='Enumerate all domain/local user accounts')
user_parser.add_argument('-name', action="store", metavar = "NAME", help='Display single user information.')
user_parser.add_argument('-create', action="store", metavar = "NAME", help='Add new user account to domain/computer.')
user_parser.add_argument('-remove', action="store", metavar = "NAME", help='Remove existing user account from domain/computer.')
user_parser.add_argument('-newPasswd', action="store", metavar = "PASSWORD", help='New password to set for creating account.')
computer_parser = subparsers.add_parser('computer', help='Enumerate all computers in domain level')
computer_parser.add_argument('-name', action="store", metavar = "NAME", help='Display single computer information.')
computer_parser.add_argument('-create', action="store", metavar = "NAME", help='Add new computer account to domain.')
computer_parser.add_argument('-remove', action="store", metavar = "NAME", help='Remove existing computer account from domain.')
computer_parser.add_argument('-newPasswd', action="store", metavar = "PASSWORD", help='New password to set for creating account.')
localgroup_parser = subparsers.add_parser('localgroup', help='Enumerate local groups (aliases) of local computer')
localgroup_parser.add_argument('-name', action="store", metavar = "NAME", help='Operate on single specific domain group account.')
localgroup_parser.add_argument('-join', action="store", metavar = "USER", help='Add user account to specific group.')
localgroup_parser.add_argument('-unjoin', action="store", metavar = "USER", help='Remove user account from specific group.')
group_parser = subparsers.add_parser('group', help='Enumerate domain groups registered in domain controller')
group_parser.add_argument('-name', action="store", metavar = "NAME", help='Operate on single specific localgroup account.')
group_parser.add_argument('-join', action="store", metavar = "USER", help='Add user account to specific group.')
group_parser.add_argument('-unjoin', action="store", metavar = "USER", help='Remove user account from specific group.')
group = parser.add_argument_group('authentication')
group.add_argument('-hashes', action="store", metavar = "LMHASH:NTHASH", help='NTLM hashes, format is LMHASH:NTHASH')
group.add_argument('-no-pass', action="store_true", help='don\'t ask for password (useful for -k)')
group.add_argument('-k', action="store_true", help='Use Kerberos authentication. Grabs credentials from ccache file '
'(KRB5CCNAME) based on target parameters. If valid credentials '
'cannot be found, it will use the ones specified in the command '
'line')
group.add_argument('-aesKey', action="store", metavar = "hex key", help='AES key to use for Kerberos Authentication '
'(128 or 256 bits)')
group = parser.add_argument_group('connection')
group.add_argument('-dc-ip', action='store', metavar="ip address",
help='IP Address of the domain controller. If omitted it will use the domain part (FQDN) specified in '
'the target parameter')
group.add_argument('-target-ip', action='store', metavar="ip address",
help='IP Address of the target machine. If omitted it will use whatever was specified as target. '
'This is useful when target is the NetBIOS name and you cannot resolve it')
group.add_argument('-port', choices=['139', '445'], nargs='?', default='445', metavar="destination port",
help='Destination port to connect to SMB Server')
if len(sys.argv) == 1:
parser.print_help()
sys.exit(1)
options = parser.parse_args()
if ((hasattr(options, 'join') and options.join) or hasattr(options, 'unjoin') and options.unjoin) and not options.name:
logging.error("argument '-name' is required with join/unjoin operations.")
sys.exit(1)
if (hasattr(options, 'create') and options.create) and (not hasattr(options, 'create') or not options.newPasswd):
logging.error("argument '-newPasswd' is required for creating new account.")
sys.exit(1)
if options.debug is True:
logging.getLogger().setLevel(logging.DEBUG)
logging.debug(version.getInstallationPath())
else:
logging.getLogger().setLevel(logging.INFO)
domain, username, password, address = parse_target(options.target)
if options.target_ip is None:
options.target_ip = address
if domain is None:
domain = ''
if password == '' and username != '' and options.hashes is None and options.no_pass is False and options.aesKey is None:
from getpass import getpass
password = getpass("Password: ")
if options.aesKey is not None:
options.k = True
if options.hashes is not None:
lmhash, nthash = options.hashes.split(':')
else:
lmhash = ''
nthash = ''
net = Net(domain, username, password, options)
try:
net.run(address, options.target_ip)
except Exception as e:
if logging.getLogger().level == logging.DEBUG:
import traceback
traceback.print_exc()
logging.error(str(e))