| Title | Anomaly Detection of ICS Communication Using Statistical Models |
| Publication Type | Conference Paper |
| Year of Publication | 2021 |
| Authors | Burgetová, Ivana, Matoušek, Petr, Ryšavý, Ondřej |
| Conference Name | 2021 17th International Conference on Network and Service Management (CNSM) |
| Date Published | oct |
| Keywords | anomaly detection, communication patterns, ICS Anomaly Detection, IEC 104, IEC standards, industrial networks, Integrated circuit modeling, Monitoring, pubcrawl, resilience, Resiliency, Scalability, Smart grid, statistical distributions, Switches, Traffic Control, Training, Windows |
| Abstract | Industrial Control System (ICS) transmits control and monitoring data between devices in an industrial environment that includes smart grids, water and gas distribution, or traffic control. Unlike traditional internet communication, ICS traffic is stable, periodical, and with regular communication patterns that can be described using statistical modeling. By observing selected features of ICS transmission, e.g., packet direction and inter-arrival times, we can create a statistical profile of the communication based on distribution of features learned from the normal ICS traffic. This paper demonstrates that using statistical modeling, we can detect various anomalies caused by irregular transmissions, device or link failures, and also cyber attacks like packet injection, scanning, or denial of service (DoS). The paper shows how a statistical model is automatically created from a training dataset. We present two types of statistical profiles: the master-oriented profile for one-to-many communication and the peer-to-peer profile that describes traffic between two ICS devices. The proposed approach is fast and easy to implement as a part of an intrusion detection system (IDS) or an anomaly detection (AD) module. The proof-of-concept is demonstrated on two industrial protocols: IEC 60870-5-104 (aka IEC 104) and IEC 61850 (Goose). |
| DOI | 10.23919/CNSM52442.2021.9615510 |
| Citation Key | burgetova_anomaly_2021 |
Anomaly Detection of ICS Communication Using Statistical Models