Bro in SCADA: dynamic intrusion detection policies based on a system model

Justyna J. Chromik, Anne Remke, Boudewijn R. Haverkort

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


We present an online monitoring tool for SCADA systems based on the network monitor Bro, which can be used locally at eld stations. The tool generates alerts when suspicious and erroneous commands and sensor readings are detected. It can hence be seen as a local Intrusion Detection System, as well as a safety enhancement. It maintains a model of the local system, which is updated with incoming packets containing sensor readings and commands. Focusing on the protocol IEC-104, a parser was developed and the packet content was directly fed into the system model. Adaptive policies are implemented in Bro, which formulate physical constraints and safety requirements and allow to check whether SCADA trac complies to these rules in real time. A case study with a real IEC-104 trac trace shows the feasibility of our approach.
Original languageEnglish
Title of host publication5th International Symposium for ICS&SCADA Cyber Security Research (ICS-CSR 2018)
Place of PublicationHamburg
PublisherBCS Learning & Development Ltd.
Number of pages10
ISBN (Print)9781780174549
Publication statusPublished - 30 Aug 2018
Externally publishedYes
EventInternational Symposium for ICS & SCADA Cyber Security Research 2018 - University of Hamburg, Hamburg, Germany
Duration: 29 Aug 202130 Aug 2021
Conference number: 5


ConferenceInternational Symposium for ICS & SCADA Cyber Security Research 2018
Abbreviated titleICS-CSR 2018
Internet address


  • Intrusion detection system
  • Process-aware
  • IDS
  • Power distribution


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