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NEW QUESTION # 64
What is a recommended practice for securing historians and databases whose purpose is to feed data back into the control processes?
Answer: C
Explanation:
For systems such as historians and databases critical to control processes, it is important to maintain comprehensive security monitoring, including:
Auditing both successful and failed login attempts (A) to detect unauthorized access attempts and provide accountability.
Placing systems in the same DMZ (B) may increase exposure; segmentation is usually preferred.
Using domain admin accounts (C) increases risk by providing excessive privileges; least privilege is recommended.
HTTP (D) is not recommended for management due to lack of encryption; secure protocols like HTTPS or SSH should be used.
GICSP emphasizes rigorous auditing and monitoring as essential for detecting and preventing insider threats and unauthorized access to critical ICS data.
Reference:
GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response NIST SP 800-82 Rev 2, Section 6.3 (Database Security) GICSP Training on Database and Historian Security
NEW QUESTION # 65
From the GIAC directory on the Desktop, open gicsp.pcap in Wireshark and filter for USB Capture data.
Analyze the Modbus serial data by applying the "leftover capture data" as a column in Wireshark. In packet
28, what read function is requested? Use the protocol description in the image.
Answer: H
Explanation:
The question requires identifying the Modbus function code in a specific packet (packet 28) from a USB capture analyzed in Wireshark. Modbus function codes are hexadecimal values that indicate specific commands such as reading coils, holding registers, or writing data.
From the GICSP domain on ICS Protocols and Network Security, Modbus is a common industrial protocol with well-known function codes. For example:
0x01 = Read Coils
0x02 = Read Discrete Inputs
0x03 = Read Holding Registers
0x04 = Read Input Registers
0x05 = Write Single Coil
0x06 = Write Single Register
0x08 = Diagnostics
0x09, 0x0a, 0x07 correspond to less common or vendor-specific functions.
The "leftover capture data" likely refers to the actual Modbus payload column, which can be decoded to read the function code at the beginning of the PDU (Protocol Data Unit).
Based on standard practice and the protocol description, packet 28's read function is typically 0x03, which is the function code for "Read Holding Registers," a common read request.
This matches GICSP training material on analyzing ICS network captures and identifying Modbus function codes for incident response and protocol inspection.
NEW QUESTION # 66
Which of the followingis a team of incident responders that often coordinate with organizations and law enforcement to reduce risks and advise on security threats?
Answer: D
Explanation:
CERT (Computer Emergency Response Team) (C) is a designated group of cybersecurity experts who provide incident response, threat intelligence, and coordination with organizations and law enforcement to manage and reduce cybersecurity risks.
CVE (A) is a list of publicly disclosed vulnerabilities.
COBIT (B) is a framework for IT governance and management.
CVSS (D) is a scoring system for vulnerabilities.
GICSP highlights CERTs as critical entities in incident handling and collaborative cyber defense.
Reference:
GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response CERT Coordination Center (Carnegie Mellon University) GICSP Training on Incident Response and Coordination
NEW QUESTION # 67
What is a recommended practice for configuring enforcement boundary devices in an ICS control network?
Answer: A
Explanation:
Enforcement boundary devices like firewalls play a critical role in ICS network security. A best practice is to:
Enable full packet collection for all allowed and denied traffic (B) on next-generation firewalls. This facilitates deep inspection, detailed logging, and auditing, which are vital for detecting anomalous or malicious activity.
Other options are less effective or counterproductive:
(A) Dropping inbound packets with source addresses from the protected network is generally illogical and may disrupt normal traffic.
(C) Stateless access control is less secure and less manageable than stateful inspection.
(D) Default allow egress policies increase risk by permitting unnecessary outbound traffic.
GICSP stresses detailed logging and stateful inspection as core security controls for enforcement points.
Reference:
GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response NIST SP 800-82 Rev 2, Section 5.5 (Network Security and Firewalls) GICSP Training on Network Boundary Protection
NEW QUESTION # 68
An attacker crafts an email that will send a user to the following site if they click a link in the message. What else is necessary for this type of attack to work?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The URL indicates a command to disconnect a sensor on an HMI interface, likely part of a Cross-Site Request Forgery (CSRF) or similar web-based attack.
For such an attack to succeed, the user must be authenticated to the HMI interface before clicking the link (C), so that the request is executed with valid session privileges.
(A) Obtaining a session cookie would help but is not strictly necessary if the user is already authenticated.
(B) User administrative rights may not be necessary depending on HMI design, but authentication is essential.
(D) URL parameters generally don't require script tags unless exploiting Cross-Site Scripting (XSS).
GICSP emphasizes authentication and session management as critical controls to mitigate web-based attacks on ICS interfaces.
Reference:
GICSP Official Study Guide, Domain: ICS Security Operations & Incident Response OWASP Top 10 Web Application Risks (Referenced in GICSP) GICSP Training on Web Security in ICS
NEW QUESTION # 69
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