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Merge pull request #642 from nurfed1/master 

LDAP protocol improvements and scan-network module bugfix
main
mpgn 2022-10-05 17:34:56 +02:00 committed by GitHub
parent 21b5adb138 b11bc43380
commit fc57723678
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 162 additions and 77 deletions
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2
cme/modules/scan-network.py
View File

@ -39,7 +39,7 @@ def get_dns_resolver(server, context):
return dnsresolver
def ldap2domain(ldap):
return re.sub(',DC=', '.', ldap[ldap.find('dc='):], flags=re.I)[3:]
return re.sub(',DC=', '.', ldap[ldap.lower().find('dc='):], flags=re.I)[3:]
def new_record(rtype, serial):
nr = DNS_RECORD()

222
cme/protocols/ldap.py
View File

@ -20,9 +20,11 @@ from impacket.krb5.types import KerberosTime, Principal
from impacket.ldap import ldap as ldap_impacket
from impacket.krb5 import constants
from impacket.ldap import ldapasn1 as ldapasn1_impacket
import argparse
from io import StringIO
from pywerview.cli.helpers import *
from pywerview.requester import RPCRequester
import re
ldap_error_status = {
"533":"STATUS_ACCOUNT_DISABLED",
@ -35,6 +37,22 @@ ldap_error_status = {
"50":"LDAP_INSUFFICIENT_ACCESS"
}
def get_conditional_action(baseAction):
class ConditionalAction(baseAction):
def __init__(self, option_strings, dest, **kwargs):
x = kwargs.pop('make_required', [])
super(ConditionalAction, self).__init__(option_strings, dest, **kwargs)
self.make_required = x
def __call__(self, parser, namespace, values, option_string=None):
for x in self.make_required:
x.required = True
super(ConditionalAction, self).__call__(parser, namespace, values, option_string)
return ConditionalAction
class ldap(connection):
def __init__(self, args, db, host):
@ -46,6 +64,7 @@ class ldap(connection):
self.lmhash = ''
self.nthash = ''
self.baseDN = ''
self.targetDomain = ''
self.remote_ops = None
self.bootkey = None
self.output_filename = None
@ -63,10 +82,12 @@ class ldap(connection):
ldap_parser.add_argument("--no-bruteforce", action='store_true', help='No spray when using file for username and password (user1 => password1, user2 => password2')
ldap_parser.add_argument("--continue-on-success", action='store_true', help="continues authentication attempts even after successes")
ldap_parser.add_argument("--port", type=int, choices={389, 636}, default=389, help="LDAP port (default: 389)")
ldap_parser.add_argument("--no-smb", action='store_true', help='No smb connection')
no_smb_arg = ldap_parser.add_argument("--no-smb", action=get_conditional_action(argparse._StoreTrueAction), make_required=[], help='No smb connection')
dgroup = ldap_parser.add_mutually_exclusive_group()
dgroup.add_argument("-d", metavar="DOMAIN", dest='domain', type=str, default=None, help="domain to authenticate to")
domain_arg = dgroup.add_argument("-d", metavar="DOMAIN", dest='domain', type=str, default=None, help="domain to authenticate to")
dgroup.add_argument("--local-auth", action='store_true', help='authenticate locally to each target')
no_smb_arg.make_required = [domain_arg]
egroup = ldap_parser.add_argument_group("Retrevie hash on the remote DC", "Options to get hashes from Kerberos")
egroup.add_argument("--asreproast", help="Get AS_REP response ready to crack with hashcat")
@ -89,6 +110,32 @@ class ldap(connection):
'hostname': self.hostname
})
def get_ldap_info(self, host):
try:
ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % host)
resp = ldapConnection.search(scope=ldapasn1_impacket.Scope('baseObject'), attributes=['defaultNamingContext', 'dnsHostName'], sizeLimit=0)
for item in resp:
if isinstance(item, ldapasn1_impacket.SearchResultEntry) is not True:
continue
target = None
targetDomain = None
baseDN = None
try:
for attribute in item['attributes']:
if str(attribute['type']) == 'defaultNamingContext':
baseDN = str(attribute['vals'][0])
targetDomain = re.sub(',DC=', '.', baseDN[baseDN.lower().find('dc='):], flags=re.I)[3:]
if str(attribute['type']) == 'dnsHostName':
target = str(attribute['vals'][0])
except Exception as e:
logging.debug("Exception:", exc_info=True)
logging.debug('Skipping item, cannot process due to error %s' % str(e))
except OSError as e:
self.logger.error(u'Error connecting to the host.')
return [target, targetDomain, baseDN]
def get_os_arch(self):
try:
stringBinding = r'ncacn_ip_tcp:{}[135]'.format(self.host)
@ -113,6 +160,20 @@ class ldap(connection):
return 0
def get_ldap_username(self):
extendedRequest = ldapasn1_impacket.ExtendedRequest()
extendedRequest['requestName'] = '1.3.6.1.4.1.4203.1.11.3' # whoami
response = self.ldapConnection.sendReceive(extendedRequest)
for message in response:
searchResult = message['protocolOp'].getComponent()
if searchResult['resultCode'] == ldapasn1_impacket.ResultCode('success'):
responseValue = searchResult['responseValue']
if responseValue.hasValue():
value = responseValue.asOctets().decode(responseValue.encoding)[2:]
return value.split('\\')[1]
return ''
def enum_host_info(self):
# smb no open, specify the domain
if self.args.no_smb:
@ -177,46 +238,55 @@ class ldap(connection):
return True
def kerberos_login(self, domain, aesKey, kdcHost):
if self.kdcHost is not None:
target = self.kdcHost
else:
target = self.domain
self.kdcHost = self.domain
# Create the baseDN
self.baseDN = ''
domainParts = self.domain.split('.')
for i in domainParts:
self.baseDN += 'dc=%s,' % i
# Remove last ','
self.baseDN = self.baseDN[:-1]
# Get ldap info (target, targetDomain, baseDN)
target, self.targetDomain, self.baseDN = self.get_ldap_info(self.host)
try:
self.ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % target, self.baseDN, self.kdcHost)
# Connect to LDAP
self.ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % target, self.baseDN)
self.ldapConnection.kerberosLogin(self.username, self.password, self.domain, self.lmhash, self.nthash,
self.aesKey, kdcHost=self.kdcHost)
self.aesKey, kdcHost=kdcHost)
out = u'{}{}'.format('{}\\'.format(self.domain),
self.username)
if self.username == '':
self.username = self.get_ldap_username()
self.check_if_admin()
# Prepare success credential text
out = u'{}\\{} {}'.format(domain,
self.username,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.extra['protocol'] = "LDAP"
self.logger.extra['port'] = "389"
self.logger.success(out)
if not self.args.local_auth:
add_user_bh(self.username, self.domain, self.logger, self.config)
except ldap_impacket.LDAPSessionError as e:
if str(e).find('strongerAuthRequired') >= 0:
# We need to try SSL
self.ldapConnection = ldap_impacket.LDAPConnection('ldaps://%s' % target, self.baseDN, self.kdcHost)
# Connect to LDAPS
self.ldapConnection = ldap_impacket.LDAPConnection('ldaps://%s' % target, self.baseDN)
self.ldapConnection.kerberosLogin(self.username, self.password, self.domain, self.lmhash, self.nthash,
self.aesKey, kdcHost=self.kdcHost)
self.aesKey, kdcHost=kdcHost)
out = u'{}{}'.format('{}\\'.format(self.domain),
self.username)
if self.username == '':
self.username = self.get_ldap_username()
self.check_if_admin()
# Prepare success credential text
out = u'{}\\{} {}'.format(domain,
self.username,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.extra['protocol'] = "LDAPS"
self.logger.extra['port'] = "636"
self.logger.success(out)
if not self.args.local_auth:
add_user_bh(self.username, self.domain, self.logger, self.config)
else:
errorCode = str(e).split()[-2][:-1]
self.logger.error(u'{}\\{}:{} {}'.format(self.domain,
@ -232,19 +302,8 @@ class ldap(connection):
self.password = password
self.domain = domain
if self.kdcHost is not None:
target = self.kdcHost
else:
target = domain
self.kdcHost = domain
# Create the baseDN
self.baseDN = ''
domainParts = self.kdcHost.split('.')
for i in domainParts:
self.baseDN += 'dc=%s,' % i
# Remove last ','
self.baseDN = self.baseDN[:-1]
# Get ldap info (target, targetDomain, baseDN)
target, self.targetDomain, self.baseDN = self.get_ldap_info(self.host)
if self.password == '' and self.args.asreproast:
hash_TGT = KerberosAttacks(self).getTGT_asroast(self.username)
@ -254,17 +313,17 @@ class ldap(connection):
hash_asreproast.write(hash_TGT + '\n')
return False
# Prepare success credential text
out = u'{}{}:{} {}'.format('{}\\'.format(domain),
username,
password if not self.config.get('CME', 'audit_mode') else self.config.get('CME', 'audit_mode')*8,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
try:
# Connect to LDAP
self.ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % target, self.baseDN, self.kdcHost)
self.ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % target, self.baseDN)
self.ldapConnection.login(self.username, self.password, self.domain, self.lmhash, self.nthash)
self.check_if_admin()
# Prepare success credential text
out = u'{}\\{}:{} {}'.format(domain,
self.username,
self.password if not self.config.get('CME', 'audit_mode') else self.config.get('CME', 'audit_mode')*8,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.extra['protocol'] = "LDAP"
self.logger.extra['port'] = "389"
self.logger.success(out)
@ -278,11 +337,22 @@ class ldap(connection):
if str(e).find('strongerAuthRequired') >= 0:
# We need to try SSL
try:
self.ldapConnection = ldap_impacket.LDAPConnection('ldaps://%s' % target, self.baseDN, self.kdcHost)
# Connect to LDAPS
self.ldapConnection = ldap_impacket.LDAPConnection('ldaps://%s' % target, self.baseDN)
self.ldapConnection.login(self.username, self.password, self.domain, self.lmhash, self.nthash)
self.check_if_admin()
# Prepare success credential text
out = u'{}\\{}:{} {}'.format(domain,
self.username,
self.password if not self.config.get('CME', 'audit_mode') else self.config.get('CME', 'audit_mode')*8,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.extra['protocol'] = "LDAPS"
self.logger.extra['port'] = "636"
self.logger.success(out)
if not self.args.local_auth:
add_user_bh(self.username, self.domain, self.logger, self.config)
except ldap_impacket.LDAPSessionError as e:
errorCode = str(e).split()[-2][:-1]
self.logger.error(u'{}\\{}:{} {}'.format(self.domain,
@ -324,19 +394,8 @@ class ldap(connection):
self.username = username
self.domain = domain
if self.kdcHost is not None:
target = self.kdcHost
else:
target = domain
self.kdcHost = domain
# Create the baseDN
self.baseDN = ''
domainParts = self.kdcHost.split('.')
for i in domainParts:
self.baseDN += 'dc=%s,' % i
# Remove last ','
self.baseDN = self.baseDN[:-1]
# Get ldap info (target, targetDomain, baseDN)
target, self.targetDomain, self.baseDN = self.get_ldap_info(self.host)
if self.hash == '' and self.args.asreproast:
hash_TGT = KerberosAttacks(self).getTGT_asroast(self.username)
@ -346,14 +405,16 @@ class ldap(connection):
hash_asreproast.write(hash_TGT + '\n')
return False
# Connect to LDAP
try:
self.ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % target, self.baseDN, self.kdcHost)
# Connect to LDAP
self.ldapConnection = ldap_impacket.LDAPConnection('ldap://%s' % target, self.baseDN)
self.ldapConnection.login(self.username, self.password, self.domain, self.lmhash, self.nthash)
self.check_if_admin()
out = u'{}{}:{} {}'.format('{}\\'.format(domain),
username,
nthash if not self.config.get('CME', 'audit_mode') else self.config.get('CME', 'audit_mode')*8,
# Prepare success credential text
out = u'{}\\{}:{} {}'.format(domain,
self.username,
self.nthash if not self.config.get('CME', 'audit_mode') else self.config.get('CME', 'audit_mode')*8,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.extra['protocol'] = "LDAP"
self.logger.extra['port'] = "389"
@ -367,11 +428,21 @@ class ldap(connection):
if str(e).find('strongerAuthRequired') >= 0:
try:
# We need to try SSL
self.ldapConnection = ldap_impacket.LDAPConnection('ldaps://%s' % target, self.baseDN, self.kdcHost)
self.ldapConnection = ldap_impacket.LDAPConnection('ldaps://%s' % target, self.baseDN)
self.ldapConnection.login(self.username, self.password, self.domain, self.lmhash, self.nthash)
self.check_if_admin()
# Prepare success credential text
out = u'{}\\{}:{} {}'.format(domain,
self.username,
self.nthash if not self.config.get('CME', 'audit_mode') else self.config.get('CME', 'audit_mode')*8,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.extra['protocol'] = "LDAPS"
self.logger.extra['port'] = "636"
self.logger.success(out)
if not self.args.local_auth:
add_user_bh(self.username, self.domain, self.logger, self.config)
except ldap_impacket.LDAPSessionError as e:
errorCode = str(e).split()[-2][:-1]
self.logger.error(u'{}\\{}:{} {}'.format(self.domain,
@ -573,7 +644,9 @@ class ldap(connection):
(UF_DONT_REQUIRE_PREAUTH, UF_ACCOUNTDISABLE)
attributes = ['sAMAccountName', 'pwdLastSet', 'MemberOf', 'userAccountControl', 'lastLogon']
resp = self.search(searchFilter, attributes, 0)
if resp:
if resp == []:
self.logger.highlight("No entries found!")
elif resp:
answers = []
self.logger.info('Total of records returned %d' % len(resp))
@ -621,6 +694,7 @@ class ldap(connection):
else:
self.logger.highlight("No entries found!")
return
else:
self.logger.error("Error with the LDAP account used")
def kerberoasting(self):
@ -629,7 +703,9 @@ class ldap(connection):
"(!(UserAccountControl:1.2.840.113556.1.4.803:=2))(!(objectCategory=computer)))"
attributes = ['servicePrincipalName', 'sAMAccountName', 'pwdLastSet', 'MemberOf', 'userAccountControl', 'lastLogon']
resp = self.search(searchFilter, attributes, 0)
if resp:
if resp == []:
self.logger.highlight("No entries found!")
elif resp:
answers = []
self.logger.info('Total of records returned %d' % len(resp))
@ -686,13 +762,18 @@ class ldap(connection):
dejavue = []
for SPN, sAMAccountName, memberOf, pwdLastSet, lastLogon, delegation in answers:
if sAMAccountName not in dejavue:
downLevelLogonName = self.targetDomain + "\\" + sAMAccountName
try:
serverName = Principal(SPN, type=constants.PrincipalNameType.NT_SRV_INST.value)
tgs, cipher, oldSessionKey, sessionKey = getKerberosTGS(serverName, self.domain,
principalName = Principal()
principalName.type = constants.PrincipalNameType.NT_MS_PRINCIPAL.value
principalName.components = [downLevelLogonName]
tgs, cipher, oldSessionKey, sessionKey = getKerberosTGS(principalName, self.domain,
self.kdcHost,
TGT['KDC_REP'], TGT['cipher'],
TGT['sessionKey'])
r = KerberosAttacks(self).outputTGS(tgs, oldSessionKey, sessionKey, sAMAccountName, SPN)
r = KerberosAttacks(self).outputTGS(tgs, oldSessionKey, sessionKey, sAMAccountName, self.targetDomain + "/" + sAMAccountName)
self.logger.highlight(u'sAMAccountName: {} memberOf: {} pwdLastSet: {} lastLogon:{}'.format(sAMAccountName, memberOf, pwdLastSet, lastLogon))
self.logger.highlight(u'{}'.format(r))
with open(self.args.kerberoasting, 'a+') as hash_kerberoasting:
@ -700,7 +781,7 @@ class ldap(connection):
dejavue.append(sAMAccountName)
except Exception as e:
logging.debug("Exception:", exc_info=True)
logging.error('SPN: %s - %s' % (SPN,str(e)))
logging.error('Principal: %s - %s' % (downLevelLogonName, str(e)))
return True
else:
self.logger.highlight("No entries found!")
@ -874,3 +955,6 @@ class ldap(connection):
self.logger.error("No entries found!")
return

3
cme/protocols/ldap/kerberos.py
View File

@ -23,6 +23,7 @@ class KerberosAttacks:
self.username = connection.username
self.password = connection.password
self.domain = connection.domain
self.targetDomain = connection.targetDomain
self.hash = connection.hash
self.lmhash = ''
self.nthash = ''
@ -142,7 +143,7 @@ class KerberosAttacks:
asReq = AS_REQ()
domain = self.domain.upper()
domain = self.targetDomain.upper()
serverName = Principal('krbtgt/%s' % domain, type=constants.PrincipalNameType.NT_PRINCIPAL.value)
pacRequest = KERB_PA_PAC_REQUEST()