EC-COUNCIL ICS-SCADA Online Practice Questions and Exam Preparation

EC-COUNCIL ICS-SCADA Online Questions & Answers

• Question 41:

  Which component of the IT Security Model is the highest priority in ICS/SCADA Security?

  A. Integrity
  B. Authentication
  C. Availability
  D. Confidentiality
  C. Availability

  ---

  Explanation

  In ICS/SCADA systems, the highest priority typically is Availability, due to the critical nature of the services and infrastructures they support. These systems often control vital processes in industries like energy, water treatment, and

  manufacturing. Any downtimecan lead to significant disruptions, safety hazards, or economic losses. Thus, ensuring that systems are operational and accessible is a primary security focus in the context of ICS/SCADA security.

  References:

  National Institute of Standards and Technology (NIST), "Guide to Industrial Control Systems (ICS) Security".

• Question 42:

  With respect to the IEC 62443, how many steps are in the Defense in Depth process?

  A. 8
  B. 4
  C. 6
  D. 2
  C. 6

  ---

  Explanation

  IEC 62443 is a series of standards designed to secure Industrial Automation and Control Systems (IACS). It provides a framework for implementing cybersecurity measures in the context of industrial environments.

  The Defense in Depth (DiD) approach outlined in IEC 62443 involves multiple layers of security measures to protect industrial networks. This method ensures that if one layer fails, others are in place to continue protection.

  Specifically, the IEC 62443 framework describes six fundamental steps in setting up a Defense in Depth strategy, covering aspects from physical security to network segmentation and device hardening. References

  International Electrotechnical Commission, IEC 62443 Series.

  "Understanding IEC 62443 for Industrial Cybersecurity," by ISA99 Committee.

  The IEC 62443 standard outlines a comprehensive framework for securing industrial automation and control systems (IACS). The Defense in Depth concept within this standard includes six steps designed to ensure robust security.

  Step 1: Identification and Authentication Control (IAC): Ensuring only authorized users and devices can access the system.

  Step 2: Use Control (UC): Managing permissions and access controls to restrict actions users can perform.

  Step 3: System Integrity (SI): Ensuring the system remains in a trustworthy state, protected from unauthorized changes.

  Step 4: Data Confidentiality (DC): Protecting sensitive data from unauthorized access and disclosure.

  Step 5: Restricted Data Flow (RDF): Controlling and monitoring data flows to prevent unauthorized data transmission.

  Step 6: Timely Response to Events (TRE): Implementing mechanisms to detect, respond to, and recover from security incidents.

  These steps collectively form the Defense in Depth strategy prescribed by IEC 62443.

  References:

  "IEC 62443 - Industrial Automation and Control Systems Security," International Electrotechnical Commission, IEC 62443. "Defense in Depth," Cybersecurity and Infrastructure Security Agency (CISA), Defense in Depth.

• Question 43:

  What is the extension of nmap scripts?

  A. .nsn
  B. .nse
  C. .nsv
  D. .ns
  B. .nse

  ---

  Explanation

  Nmap scripts, which are used to enhance the functionality of Nmap for performing network discovery, security auditing, and other tasks, have the extension .nse . This stands for Nmap Scripting Engine, which allows users to write scripts to

  automate a widevariety of networking tasks.

  References:

  Nmap Network Scanning by Gordon Lyon (also known as Fyodor Vaskovich), detailing the use and examples of Nmap scripts.

• Question 44:

  Which component of the IT Security Model is attacked with modification?

  A. Authentication
  B. Availability
  C. Integrity
  D. Confidentiality
  C. Integrity

  ---

  Explanation

  Modification attacks directly impact the integrity of data within the IT Security Model. Integrity ensures that information is accurate and unchanged from its original form unless altered by authorized means. An attack that involves modification

  manipulates data in unauthorized ways, thereby compromising its accuracy and reliability.

  References:

  Shon Harris, "CISSP Certification: All-in-One Exam Guide".

• Question 45:

  Which of the following is a component of an IDS?

  A. All of these
  B. Respond
  C. Detect
  D. Monitor
  A. All of these

  ---

  Explanation

  An Intrusion Detection System (IDS) is designed to monitor network or system activities for malicious activities or policy violations and can perform several functions:

  Monitor:Observing network traffic and system activities for unusual or suspicious behavior.

  Detect:Identifying potential security breaches including both known threats and unusual activities that could indicate new threats.

  Respond:Executing pre-defined actions to address detected threats, which can include alerts or triggering automatic countermeasures.

  References:

  Cisco Systems, "Intrusion Detection Systems".

• Question 46:

  Which of the following is required to determine the correct Security Association?

  A. SPI
  B. Partner IP address
  C. Protocol
  D. All of these
  D. All of these

  ---

  Explanation

  To determine the correct Security Association (SA) in the context of IPsec, several elements are required

  SPI (Security Parameter Index): Uniquely identifies the SA.

  Partner IP address: The address of the endpoint with which the SA is established.

  Protocol: Specifies the type of security protocol used (e.g., AH or ESP). All these components collectively define and identify a specific SA for secure communication between parties.

  References:

  RFC 4301, "Security Architecture for the Internet Protocol".

• Question 47:

  A Security Association is a __________ way connection?

  A. One
  B. None of these
  C. Two
  D. Three
  A. One

  ---

  Explanation

  A Security Association (SA) in the context of IPsec is a one-way logical connection used for secure communication between two endpoints. IPsec requires two SAs to establish a secure, bidirectional communication channel--one for each

  direction (inbound and outbound). This arrangement ensures that each direction is independently secured, with its own set of security parameters.

  References:

  RFC 4301, "Security Architecture for the Internet Protocol".

• Question 48:

  Which of the following components is not part of the Authentication Header (AH)?

  A. Replay
  B. Authentication
  C. Confidentiality
  D. Integrity
  C. Confidentiality

  ---

  Explanation

  The Authentication Header (AH) is a component of the IPsec protocol suite that provides authentication and integrity to the communications. AH ensures that the contents of the communications have not been altered in transit (integrity) and

  verifies the sending and receiving parties (authentication). However, AH does not provide confidentiality, which would involve encrypting the payload data. Confidentiality is provided by the Encapsulating Security Payload (ESP), another

  component of IPsec.

  References:

  RFC 4302, "IP Authentication Header".

• Question 49:

  What step of the malware infection installs the malware on the target?

  A. Drive-by
  B. Init
  C. Dropper
  D. Stager
  C. Dropper

  ---

  Explanation

  The term "Dropper" in cybersecurity refers to a small piece of software used in malware deployment that is designed to install or "drop" malware (like viruses, ransomware, spyware) onto the target system.

  The Dropper itself is not typically malicious in behavior; however, it is used as a vehicle to install malware that will perform malicious activities without detection.

  During the infection process, the Dropper is usually the first executable that runs on a system. It then unpacks or downloads additional malicious components onto the system.

  References:

  Malware Enumeration (CME): http://cme.mitre.org Microsoft Malware Protection Center:https://www.microsoft.com/en-us/wdsi

• Question 50:

  Which of the following ports are used for communications in Modbus TCP?

  A. 205
  B. 405
  C. 505
  D. 502
  D. 502

  ---

  Explanation

  Modbus TCP is a variant of the Modbus family of simple, networked protocols aimed at industrial automation applications. Unlike the original Modbus protocol, which runs over serial links, Modbus TCP runs over TCP/IP networks.

  Port 502 is the standard TCP port used for Modbus TCP communications. This port is designated for Modbus messages encapsulated in a TCP/IP wrapper, facilitating communication between Modbus devices and management systems over

  an IP network.

  Knowing the correct port number is crucial for network configuration, security settings, and troubleshooting communications within a Modbus-enabled ICS/SCADA environment.

  References:

  Modbus Organization, "MODBUS Application Protocol Specification V1.1b3".

  "Modbus TCP/IP ?A Comprehensive Network protocol"; by Schneider Electric.