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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q172-Q177):

NEW QUESTION # 172
Which of the following is a cause for the increase in attacks on IACS?
Available Choices (select all choices that are correct)

Answer: A,B

Explanation:
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.


NEW QUESTION # 173
What is the FIRST step required in implementing ISO 27001?
Available Choices (select all choices that are correct)

Answer: D


NEW QUESTION # 174
Which of the following is a recommended default rule for IACS firewalls?
Available Choices (select all choices that are correct)

Answer: C


NEW QUESTION # 175
Which of the following attacks relies on a human weakness to succeed?
Available Choices (select all choices that are correct)

Answer: D


NEW QUESTION # 176
Which of the following tools has the potential for serious disruption of a control network and should not be used on a live system?
Available Choices (select all choices that are correct)

Answer: B

Explanation:
A vulnerability scanner is a tool that scans a network or a system for known vulnerabilities, such as misconfigurations, outdated software, or weak passwords. A vulnerability scanner can provide valuable information for improving the security posture of a system, but it can also cause serious disruption of a control network if used on a live system. This is because a vulnerability scanner may generate a large amount of network traffic, consume system resources, trigger alarms, or even crash devices by exploiting vulnerabilities.
Therefore, a vulnerability scanner should not be used on a live system without proper authorization and precautions. A vulnerability scanner should only be used on a test or isolated network, or during a scheduled maintenance window with minimal impact on the system operation. References: ISA/IEC 62443 Standards to Secure Your Industrial Control System, Module 5: Assessing the Current Security Level, Slide 25.


NEW QUESTION # 177
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