Anomaly Detection of Industrial Control System based on Modbus/TCP
draft-li-sacm-anomaly-detection-00

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SACM Working Group                                               S. Li
Internet Draft                                                  M. Wei
Interned status: Standards Track                               H. Wang
Expires: August 27, 2017                                      Q. Huang
                                                               P. Wang
                                                               J. Liao
                                               Chongqing University of
                                          Posts and Telecommunications
                                                     February 23, 2017

  Anomaly Detection of Industrial Control System based on Modbus/TCP
                    draft-li-sacm-anomaly-detection-00

Abstract

   Aiming at the vulnerability and security threat of Industrial
   Control System, this document proposed a detection model based on
   the characteristics of Modbus/TCP protocol.

Status of this Memo

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   This Internet-Draft will expire on August 27, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors. All rights reserved.

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Table of Contents

   1. Introduction ................................................ 2
      1.1. Requirements Notation .................................. 3
      1.2. Terms Used ............................................. 3
   2. Overview of the detection scheme ............................ 3
   3. A detection model based on Modbus protocol features.......... 4
   4. Security Considerations ..................................... 7
   5. IANA Considerations ......................................... 7
   6. References .................................................. 7
      6.1. Normative References ................................... 7
      6.2. Informative References ................................. 7

1. Introduction

   With the development of industrialization and informatization,
   increasing information technology is applied to the industrial field.
   Due to the hardware and software, which are widely used in
   Industrial Control Systems, come from different vendors, and the ICS
   need to interact the information with the outside net, both of them
   make Industrial Control Systems more and more open, and face more
   security threats.

   The research of anomaly detection for ICS is introduced as follows.
   For example, the anomaly detection of communication protocol
   datagram format has the premise of obtaining a specific proprietary
   protocol specification, the detection method based on protocol
   message format is liable to cause lower detection rate, and is not
   easy to expand. Another anomaly detection mechanism is the
   configuration of blacklist and whitelist, in order to realize this
   mechanism, engineers need to run the system, and set the blacklist
   and whitelist according to the ICS state.

   In addition, most research work focus on intrusion detection
   algorithm, the key to improve the detection rate is to extract
   efficient features of anomaly detection. Research on intrusion

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