ICSNPP-ENIP

Industrial Control Systems Network Protocol Parsers (ICSNPP) - Ethernet/IP and CIP.

Overview

ICSNPP-ENIP is a Zeek plugin for parsing and logging fields within the Ethernet/IP protocol.

This plugin was developed to be fully customizable, so if you would like to drill down into specific ENIP/CIP packets and log certain variables, add the logging functionality to scripts/icsnpp/enip/main.zeek. The functions within scripts/icsnpp/enip/main.zeek and src/events.bif should prove to be a good guide on how to add new logging functionality.

This parser produces four log files. These log files are defined in scripts/icsnpp/enip/main.zeek.

• enip.log
• cip.log
• cip_io.log
• cip_identity.log

For additional information on these log files, see the Logging Capabilities section below.

Installation

Package Manager

This script is available as a package for Zeek Package Manger

zkg refresh
zkg install icsnpp-enip

If this package is installed from ZKG it will be added to the available plugins. This can be tested by running zeek -N. If installed correctly you will see ICSNPP::ENIP.

If you have ZKG configured to load packages (see @load packages in quickstart guide), this plugin and scripts will automatically be loaded and ready to go. ZKG Quickstart Guide

If you are not using site/local.zeek or another site installation of Zeek and just want to run this package on a packet capture you can add icsnpp/enip to your command to run this plugin's scripts on the packet capture:

git clone https://github.com/cisagov/icsnpp-enip.git
zeek -Cr icsnpp-enip/tests/traces/enip_cip_example.pcap icsnpp/enip

Manual Install

To install this package manually, clone this repository and run the configure and make commands as shown below.

git clone https://github.com/cisagov/icsnpp-enip.git
cd icsnpp-enip/
./configure
make

If these commands succeed, you will end up with a newly create build directory. This contains all the files needed to run/test this plugin. The easiest way to test the parser is to point the ZEEK_PLUGIN_PATH environment variable to this build directory.

export ZEEK_PLUGIN_PATH=$PWD/build/
zeek -N # Ensure everything compiled correctly and you are able to see ICSNPP::ENIP

Once you have tested the functionality locally and it appears to have compiled correctly, you can install it system-wide:

sudo make install
unset ZEEK_PLUGIN_PATH
zeek -N # Ensure everything installed correctly and you are able to see ICSNPP::ENIP

To run this plugin in a site deployment you will need to add the line @load icsnpp/enip to your site/local.zeek file in order to load this plugin's scripts.

If you are not using site/local.zeek or another site installation of Zeek and just want to run this package on a packet capture you can add icsnpp/enip to your command to run this plugin's scripts on the packet capture:

zeek -Cr icsnpp-enip/tests/traces/enip_cip_example.pcap icsnpp/enip

If you want to deploy this on an already existing Zeek implementation and you don't want to build the plugin on the machine, you can extract the Zeek_Enip.tgz file to the directory of the established ZEEK_PLUGIN_PATH (default is ${ZEEK_INSTALLATION_DIR}/lib/zeek/plugins/).

tar xvzf build/Zeek_Enip.tgz -C $ZEEK_PLUGIN_PATH 

Logging Capabilities

ENIP Header Log (enip.log)

Overview

This log captures Ethernet/IP header information for every Ethernet/IP packet and logs it to enip.log.

Fields Captured

Field	Type	Description
ts	time	Timestamp
uid	string	Unique ID for this connection
id	conn_id	Default Zeek connection info (IP addresses, ports)
is_orig	bool	True if the packet is sent from the originator
enip_command_code	string	Ethernet/IP command code
enip_command	string	Ethernet/IP command name
length	count	Length of ENIP data following header
session_handle	string	Session identifier
enip_status	string	Ethernet/IP status code
sender_context	string	Sender context
options	string	Options flags

CIP Header Log (cip.log)

Overview

This log captures CIP header information for every CIP packet and logs it to cip.log.

Fields Captured

Field	Type	Description
ts	time	Timestamp
uid	string	Unique ID for this connection
id	conn_id	Default Zeek connection info (IP addresses, ports)
is_orig	bool	True if the packet is sent from the originator
cip_sequence_count	count	CIP sequence number
direction	string	Request or response
cip_service_code	string	CIP service code
cip_service	string	CIP service name
cip_status	string	CIP status code
class_id	string	CIP request path - class ID
class_name	string	CIP request path - class name
instance_id	string	CIP request path - instance ID
attribute_id	string	CIP request path - attribute ID

CIP I/O Log (cip_io.log)

Overview

This log captures CIP I/O (input-output) data for every CIP IO packet and logs it to cip_io.log.

Fields Captured

Field	Type	Description
ts	time	Timestamp
uid	string	Unique ID for this connection
id	conn_id	Default Zeek connection info (IP addresses, ports)
is_orig	bool	True if the packet is sent from the originator
connection_id	string	Connection identifier
sequence_number	count	Sequence number within connection
data_length	count	Length of data in io_data field
io_data	string	CIP IO data (in hex)

CIP Identity Log (cip_identity.log)

Overview

This log captures important variables for CIP_Identity objects and logs them to cip_identity.log.

Fields Captured

Field	Type	Description
ts	time	Timestamp
uid	string	Unique ID for this connection
id	conn_id	Default Zeek connection info (IP addresses, ports)
encapsulation_version	count	Encapsulation protocol version supported
socket_address	addr	Socket address IP address
socket_port	count	Socket address port number
vendor_id	count	Vendor ID
vendor_name	string	Name of vendor
device_type_id	count	Device type ID
device_type_name	string	Name of device type
product_code	count	Product code assigned to device
revision	string	Device revision (major.minor)
device_status	string	Current status of device
serial_number	string	Serial number of device
product_name	string	Human readable description of device
device_state	string	Current state of the device

ICSNPP Packages

All ICSNPP Packages:

• ICSNPP

Full ICS Protocol Parsers:

• BACnet
  • Full Zeek protocol parser for BACnet (Building Control and Automation)
• BSAP
  • Full Zeek protocol parser for BSAP (Bristol Standard Asynchronous Protocol) over IP
  • Full Zeek protocol parser for BSAP Serial comm converted using serial tap device
• Ethercat
  • Full Zeek protocol parser for Ethercat
• Ethernet/IP and CIP
  • Full Zeek protocol parser for Ethernet/IP and CIP
• Genisys
  • Full Zeek protocol parser for Genisys
• OPCUA-Binary
  • Full Zeek protocol parser for OPC UA (OPC Unified Architecture) - Binary
• S7Comm
  • Full Zeek protocol parser for S7comm, S7comm-plus, and COTP

Updates to Zeek ICS Protocol Parsers:

• DNP3
  • DNP3 Zeek script extending logging capabilities of Zeek's default DNP3 protocol parser
• Modbus
  • Modbus Zeek script extending logging capabilities of Zeek's default Modbus protocol parser

Other Software

Idaho National Laboratory is a cutting edge research facility which is a constantly producing high quality research and software. Feel free to take a look at our other software and scientific offerings at:

Primary Technology Offerings Page

Supported Open Source Software

Raw Experiment Open Source Software

Unsupported Open Source Software

License

Copyright 2022 Battelle Energy Alliance, LLC

Licensed under the 3-Part BSD (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

https://opensource.org/licenses/BSD-3-Clause

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Licensing

This software is licensed under the terms you may find in the file named "LICENSE" in this directory.