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ISA ISA-IEC-62443 Exam Sample Questions

Question # 1

Which of the following is a cause for the increase in attacks on IACS? Available Choices (select all choices that are correct)

A. Use of proprietary communications protocols

B. The move away from commercial off the shelf (COTS) systems, protocols, and networks

C. Knowledge of exploits and tools readily available on the Internet

D. Fewer personnel with system knowledge having access to IACS

Answer

A. Use of proprietary communications protocols
C. Knowledge of exploits and tools readily available on the Internet

One of the reasons for the increase in attacks on IACS is the availability of information and tools that can be used to exploit vulnerabilities in these systems. The Internet provides a platform for hackers, researchers, and activists to share their knowledge and techniques for compromising IACS. Some examples of such information and tools are:

• Stuxnet: A sophisticated malware that targeted the Iranian nuclear program in 2010. It exploited four zero-day vulnerabilities in Windows and Siemens software to infect and manipulate the programmable logic controllers (PLCs) that controlled the centrifuges. Stuxnet was widely analyzed and reported by the media and security experts, and its source code was leaked online1.
• Metasploit: A popular penetration testing framework that contains modules for exploiting various IACS components and protocols. For instance, Metasploit includes modules for attacking Modbus, DNP3, OPC, and Siemens S7 devices2.
• Shodan: A search engine that allows users to find devices connected to the Internet, such as webcams, routers, printers, and IACS components. Shodan can reveal the location, model, firmware, and configuration of these devices, which can be used by attackers to identify potential targets and vulnerabilities3.
• ICS-CERT: A website that provides alerts, advisories, and reports on IACS security issues and incidents. ICS-CERT also publishes vulnerability notes and mitigation recommendations for various IACS products and vendors4. These sources of information and tools can be useful for legitimate purposes, such as security testing, research, and education, but they can also be misused by malicious actors who want to disrupt, damage, or steal from IACS. Therefore, IACS owners and operators should be aware of the threats and risks posed by the Internet and implement appropriate security measures to protect their systems.

References:

• The increase in attacks on Industrial Automation and Control Systems (IACS) can be attributed to several factors, including: A.Use of proprietary communications protocols:These can pose security risks because they may not have been designed with security in mind and are often not as well-tested against security threats as more standard protocols. C.Knowledge of exploits and tools readily available on the Internet:The availability of information about vulnerabilities and exploits on the internet has made it easier for attackers to target IACS.
• The other options, B and D, are incorrect because: B. The move towards commercial off-the-shelf (COTS) systems, protocols, and networks actually increases risk because these systems are more likely to be known and targeted by attackers, compared to proprietary systems which might benefit from security through obscurity. D. There is actually an increase in risk with more personnel with system knowledge because it enlarges the attack surface – each individual with system knowledge can potentially become a vector for an attack, either maliciously or accidentally.

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Question # 2

Which analysis method is MOST frequently used as an input to a security risk assessment?Available Choices (select all choices that are correct)

A. Failure Mode and Effects Analysis

B. Job Safety Analysis(JSA)

C. Process Hazard Analysis (PHA)

D. System Safety Analysis(SSA)

Answer

C. Process Hazard Analysis (PHA)

A Process Hazard Analysis (PHA) is a systematic and structured method of identifying and evaluating the potential hazards and risks associated with an industrial process. A PHA can help to identify the possible causes and consequences of undesired events, such as equipment failures, human errors, cyberattacks, natural disasters, etc. A PHA can also provide recommendations for reducing the likelihood and severity of such events, as well as improving the safety and security of the process. A PHA is one of the most frequently used analysis methods as an input to a security risk assessment, as it can help to identify the assets, threats, vulnerabilities, and impacts related to the process, and provide a basis for determining the security risk level and the appropriate security countermeasures. A PHA is also a requirement of the ISA/IEC 62443 standard, as part of the security program development and implementation phase12.

References: 1: ISA/IEC 62443-2-1: Security for industrial automation and control systems: Establishing an industrial automation and control systems security program 2: ISA/IEC 62443-3-2: Security for industrial automation and control systems: Security risk assessment for system design

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Question # 3

In an IACS system, a typical security conduit consists of which of the following assets? Available Choices (select all choices that are correct)

A. Controllers, sensors, transmitters, and final control elements

B. Wiring, routers, switches, and network management devices

C. Ferrous, thickwall, and threaded conduit including raceways

D. Power lines, cabinet enclosures, and protective grounds

Answer

B. Wiring, routers, switches, and network management devices

A security conduit is a logical or physical grouping of communication channels connecting two or more zones that share common security requirements1. A zone is a grouping of systems and components based on their functional, logical, and physical relationship that share common security requirements1. Therefore, a security conduit consists of assets that enable or facilitatecommunication between zones, such as wiring, routers, switches, and network management devices. Controllers, sensors, transmitters, and final control elements are examples of assets that belong to a zone, not a conduit. Ferrous, thickwall, and threaded conduit including raceways are physical structures that may enclose or protect wiring, but they are not part of the communication channels themselves. Power lines, cabinet enclosures, and protective grounds are also not part of the communication channels, but rather provide power or protection to the assets in a zone or a conduit. References: 1: Key Concepts of ISA/IEC 62443: Zones & Security Levels | Dragos

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Question # 4

Which organization manages the ISASecure conformance certification program? Available Choices (select all choices that are correct)

A. American Society for Industrial Security

B. Automation Federation

C. National Institute of Standards and Technology

D. Security Compliance Institute

Answer

D. Security Compliance Institute

The ISASecure conformance certification program is managed by the Security Compliance Institute (ISCI), a non-profit organization established in 2007 by a group of industry stakeholders, including end users, suppliers, and integrators. ISCI’s mission is to provide a common industry-accepted set of device and process requirements that drive device security, simplifying procurement for asset owners and device assurance for equipment vendors12.

References:

1: ISASecure - IEC 62443 Conformance Certification - Official Site
2: Certifications - ISASecure

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Question # 5

Which of the following is an industry sector-specific standard? Available Choices (select all choices that are correct)

A. ISA-62443 (EC 62443)

B. NIST SP800-82

C. API 1164

D. ISO 27001

Answer

C. API 1164

Explanation:

API 1164 is an industry sector-specific standard that provides guidance on the cybersecurity of pipeline supervisory control and data acquisition (SCADA) systems. API stands for American Petroleum Institute, which is the largest U.S. trade association for the oil and natural gas industry. API 1164 was first published in 2004 and revised in 2009 and 2021. The latest version of the standard aligns with the ISA/IEC 62443 series of standards and incorporates the concepts of security levels, zones, and conduits. API 1164 covers the security lifecycle of pipeline SCADA systems, from risk assessment and policy development to implementation and maintenance. The standard also defines roles and responsibilities, security requirements, security controls, and security assessment methods for pipeline SCADA systems.

References:

• API 1164: Pipeline SCADA Security, Fourth Edition, September 2021
• ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 2.2.2, Industry Sector-Specific Standards
• ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 2.2.2, Industry Sector-Specific Standards

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