Python impacket.smb.py() Examples

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Example #1
Source File: ntlm_challenger.py    From ntlm_challenger with MIT License 4 votes vote down vote up 
def request_SMBv23(host, port=445):

  # start client
  smb_client = smb3.SMB3(host, host, sess_port=port)
  
  # start: modified from login()
  # https://github.com/SecureAuthCorp/impacket/blob/master/impacket/smb3.py
  
  session_setup = smb3.SMB2SessionSetup()
  
  if smb_client.RequireMessageSigning is True:
    session_setup['SecurityMode'] = smb3.SMB2_NEGOTIATE_SIGNING_REQUIRED
  else:
    session_setup['SecurityMode'] = smb3.SMB2_NEGOTIATE_SIGNING_ENABLED
  
  session_setup['Flags'] = 0
  
  ## NTLMSSP
  blob = smb3.SPNEGO_NegTokenInit()
  blob['MechTypes'] = [smb3.TypesMech['NTLMSSP - Microsoft NTLM Security Support Provider']]
  
  auth = ntlm.getNTLMSSPType1(smb_client._Connection['ClientName'], '',
            smb_client._Connection['RequireSigning'])
  blob['MechToken'] = auth.getData()

  session_setup['SecurityBufferLength'] = len(blob)
  session_setup['Buffer']               = blob.getData()
  
  packet = smb_client.SMB_PACKET()
  packet['Command'] = smb3.SMB2_SESSION_SETUP
  packet['Data']    = session_setup
  
  packet_id = smb_client.sendSMB(packet)
  
  smb_response = smb_client.recvSMB(packet_id)

  if smb_client._Connection['Dialect'] == smb3.SMB2_DIALECT_311:
      smb_client.__UpdatePreAuthHash(smb_response.rawData)
  
  ## NTLM challenge
  if smb_response.isValidAnswer(smb3.STATUS_MORE_PROCESSING_REQUIRED):
    session_setup_response = smb3.SMB2SessionSetup_Response(smb_response['Data'])
    resp_token = smb3.SPNEGO_NegTokenResp(session_setup_response['Buffer'])

    return resp_token['ResponseToken']

  else:
    return None