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質問 # 14
Nancy, a security specialist, was instructed to identify issues related to unexpected shutdown and restarts on a Linux machine. To identify the incident cause, Nancy navigated to a directory on the Linux system and accessed a log file to troubleshoot problems related to improper shutdowns and unplanned restarts.
Identify the Linux log file accessed by Nancy in the above scenario.
- A. /var/log/boot.log
- B. /var/log/lighttpd/
- C. /var/log/secure
- D. /var/log/kern.log
正解：A
質問 # 15
Johnson, an attacker, performed online research for the contact details of reputed cybersecurity firms. He found the contact number of sibertech.org and dialed the number, claiming himself to represent a technical support team from a vendor. He warned that a specific server is about to be compromised and requested sibertech.org to follow the provided instructions. Consequently, he prompted the victim to execute unusual commands and install malicious files, which were then used to collect and pass critical Information to Johnson's machine. What is the social engineering technique Steve employed in the above scenario?
- A. Quid pro quo
- B. Diversion theft
- C. Phishing
- D. Elicitation
正解：A
質問 # 16
RAT has been setup in one of the machines connected to the network to steal the important Sensitive corporate docs located on Desktop of the server, further investigation revealed the IP address of the server 20.20.10.26. Initiate a remote connection using thief client and determine the number of files present in the folder.
Hint: Thief folder is located at: Z:\CCT-Tools\CCT Module 01 Information Security Threats and Vulnerabilities\Remote Access Trojans (RAT)\Thief of Attacker Machine-1.
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
質問 # 17
Identify a machine in the network with 5SH service enabled. Initiate an SSH Connection to the machine, find the file, ttag.txt. in the machine, and enter the tile's content as the answer. The credentials tor SSH login are sam/adm(admin@123. {Practical Question)
- A. bobt@sam
- B. sam@bob
- C. bob2@sam
- D. sam2@bob
正解：A
解説：
bob1@sam is the file's content as the answer. To find the machine with SSH service enabled, one can use a network scanning tool such as Nmap to scan the network for port 22, which is the default port for SSH. For example, the command nmap -p 22 192.168.0.0/24 will scan the network range 192.168.0.0/24 for port 22 and display the results2. To initiate an SSH connection to the machine, one can use a command-line tool such as ssh or an SSH client such as PuTTY to connect to the machine using the credentials sam/admin@123. For example, the command ssh [email protected] will connect to the machine with IP address 192.168.0.10 using the username sam and prompt for the password admin@1233. To find the file flag.txt in the machine, one can use a file searching tool such as find or locate to search for the file name in the machine's file system. For example, the command find / -name flag.txt will search for the file flag.txt from the root directory (/) and display its location4. To enter the file's content as the answer, one can use a file viewing tool such as cat or less to display the content of the file flag.txt. For example, the command cat /home/sam/flag.txt will display the content of the file flag.txt located in /home/sam/ directory5. The screenshot below shows an example of performing these steps: ![Screenshot of performing these steps] Reference: Nmap Tutorial, SSH Tutorial, Find Command Tutorial, Cat Command Tutorial, [Screenshot of performing these steps]
質問 # 18
Brielle. a security professional, was instructed to secure her organization's network from malicious activities. To achieve this, she started monitoring network activities on a control system that collected event data from various sources. During this process. Brielle observed that a malicious actor had logged in to access a network device connected to the organizational network. Which of the following types of events did Brielle identify in the above scenario?
- A. Failure audit
- B. Error
- C. Success audit
- D. Warning
正解：C
解説：
Success audit is the type of event that Brielle identified in the above scenario. Success audit is a type of event that records successful attempts to access a network device or resource. Success audit can be used to monitor authorized activities on a network, but it can also indicate unauthorized activities by malicious actors who have compromised credentials or bypassed security controls4.
質問 # 19
Cassius, a security professional, works for the risk management team in an organization. The team is responsible for performing various activities involved in the risk management process. In this process, Cassius was instructed to select and implement appropriate controls on the identified risks in order to address the risks based on their severity level.
Which of the following risk management phases was Cassius instructed to perform in the above scenario?
- A. Risk identification
- B. Risk analysis
- C. Risk prioritization
- D. Risk treatment
正解：D
解説：
Risk treatment is the risk management phase that Cassius was instructed to perform in the above scenario. Risk management is a process that involves identifying, analyzing, evaluating, treating, monitoring, and reviewing risks that can affect an organization's objectives, assets, or operations. Risk management phases can be summarized as follows: risk identification, risk analysis, risk prioritization, risk treatment, and risk monitoring . Risk identification is the risk management phase that involves identifying and documenting potential sources, causes, events, and impacts of risks. Risk analysis is the risk management phase that involves assessing and quantifying the likelihood and consequences of risks. Risk prioritization is the risk management phase that involves ranking risks based on their severity level and determining which risks need immediate attention or action. Risk treatment is the risk management phase that involves selecting and implementing appropriate controls or strategies to address risks based on their severity level . Risk treatment can include avoiding, transferring, reducing, or accepting risks. Risk monitoring is the risk management phase that involves tracking and reviewing the performance and effectiveness of risk controls or strategies over time.
質問 # 20
An IoT device that has been placed in a hospital for safety measures, it has sent an alert command to the server. The network traffic has been captured and stored in the Documents folder of the Attacker Machine-1. Analyze the loTdeviceTraffic.pcapng file and select the appropriate command that was sent by the IoT device over the network.
- A. Low_Tempe
- B. High_Tempe
- C. Temp_High
- D. Tempe_Low
正解：C
質問 # 21
A company decided to implement the cloud infrastructure within its corporate firewall 10 secure sensitive data from external access. The company invested heavily in creating a cloud architecture within its premises to manage full control over its corporate dat a. Which of the following types of cloud deployment models did the company implement in this scenario?
- A. Multi cloud
- B. Community cloud
- C. Public cloud
- D. Private cloud
正解：D
解説：
Private cloud is the type of cloud deployment model that the company implemented in this scenario. Cloud computing is a model that provides on-demand access to shared and scalable computing resources, such as servers, storage, networks, applications, etc., over the internet or a network. Cloud computing can have different types based on its service or deployment model. A cloud deployment model defines how and where the cloud infrastructure and services are hosted and accessed . A cloud deployment model can have different types, such as public cloud, private cloud, hybrid cloud, community cloud, etc. A private cloud is a type of cloud deployment model that provides exclusive access to cloud infrastructure and services to a single organization or entity . A private cloud can be hosted within or outside the organization's premises and managed by the organization or a third-party provider . A private cloud can be used to secure sensitive data from external access and maintain full control over the corporate data . In the scenario, the company decided to implement the cloud infrastructure within its corporate firewall to secure sensitive data from external access. The company invested heavily in creating a cloud architecture within its premises to manage full control over its corporate data. This means that the company implemented a private cloud for this purpose. A multi-cloud is not a type of cloud deployment model, but a term that describes a strategy that uses multiple public or private clouds from different providers for different purposes or functions . A public cloud is a type of cloud deployment model that provides open access to cloud infrastructure and services to multiple organizations or entities over the internet . A public cloud can be hosted and managed by a third-party provider that owns and operates the cloud infrastructure and services . A community cloud is a type of cloud deployment model that provides shared access to cloud infrastructure and services to multiple organizations or entities that have common interests or goals
質問 # 22
Martin, a network administrator at an organization, received breaching alerts for an application. He identified that a vulnerability in the application allowed attackers to enter malicious input. Martin evaluated the threat severity and extent of damage that could be caused by this vulnerability. He then escalated the issue to the security management team to determine appropriate mitigation strategies. In which of the following threat-modeling steps did Martin evaluate the severity level of the threat?
- A. Risk and impact analysis
- B. Application overview
- C. Identify vulnerabilities
- D. Decompose the application
正解：A
解説：
Risk and impact analysis is the threat-modeling step in which Martin evaluated the severity level of the threat in the above scenario. Threat modeling is a process that involves identifying, analyzing, and mitigating threats and risks to a system or network. Threat modeling can be used to improve the security and resilience of a system or network by applying various methods or techniques, such as STRIDE, DREAD, PASTA, etc. Threat modeling consists of various steps or phases that perform different tasks or roles. Risk and impact analysis is a threat-modeling step that involves assessing the likelihood and consequences of threats and risks to a system or network . Risk and impact analysis can be used to evaluate the severity level of threats and risks and prioritize them for mitigation . In the scenario, Martin received breaching alerts for an application. He identified that a vulnerability in the application allowed attackers to enter malicious input. Martin evaluated the threat severity and extent of damage that could be caused by this vulnerability. He then escalated the issue to the security management team to determine appropriate mitigation strategies. This means that he performed risk and impact analysis for this purpose. Identify vulnerabilities is a threat-modeling step that involves finding and documenting the weaknesses or flaws in a system or network that can be exploited by threats or risks . Application overview is a threat-modeling step that involves defining and understanding the scope, architecture, components, and functionality of a system or network . Decompose the application is a threat-modeling step that involves breaking down a system or network into smaller and simpler elements, such as data flows, processes, assets, etc.
質問 # 23
Rickson, a security professional at an organization, was instructed to establish short-range communication between devices within a range of 10 cm. For this purpose, he used a mobile connection method that employs electromagnetic induction to enable communication between devices. The mobile connection method selected by Rickson can also read RFID tags and establish Bluetooth connections with nearby devices to exchange information such as images and contact lists.
Which of the following mobile connection methods has Rickson used in above scenario?
- A. NFC
- B. ANT
- C. Cellular communication
- D. Satcom
正解：A
質問 # 24
Lorenzo, a security professional in an MNC, was instructed to establish centralized authentication, authorization, and accounting for remote-access servers. For this purpose, he implemented a protocol that is based on the client-server model and works at the transport layer of the OSI model.
Identify the remote authentication protocol employed by Lorenzo in the above scenario.
- A. IMAPS
- B. RADIUS
- C. SNMPv3
- D. POP3S
正解：B
解説：
The correct answer is B, as it identifies the remote authentication protocol employed by Lorenzo in the above scenario. RADIUS (Remote Authentication Dial-In User Service) is a protocol that provides centralized authentication, authorization, and accounting (AAA) for remote-access servers such as VPNs (Virtual Private Networks), wireless networks, or dial-up connections. RADIUS is based on the client-server model and works at the transport layer of the OSI model. RADIUS uses UDP (User Datagram Protocol) as its transport protocol and encrypts only user passwords in its messages. In the above scenario, Lorenzo implemented RADIUS to provide centralized AAA for remote-access servers. Option A is incorrect, as it does not identify the remote authentication protocol employed by Lorenzo in the above scenario. SNMPv3 (Simple Network Management Protocol version 3) is a protocol that provides network management and monitoring for network devices such as routers, switches, servers, or printers. SNMPv3 is based on the manager-agent model and works at the application layer of the OSI model. SNMPv3 uses UDP as its transport protocol and encrypts all its messages with AES (Advanced Encryption Standard) or DES (Data Encryption Standard). In the above scenario, Lorenzo did not implement SNMPv3 to provide network management and monitoring for network devices. Option C is incorrect, as it does not identify the remote authentication protocol employed by Lorenzo in the above scenario. POP3S (Post Office Protocol version 3 Secure) is a protocol that provides secure email access and retrieval for email clients from email servers. POP3S is based on the client-server model and works at the application layer of the OSI model. POP3S uses TCP (Transmission Control Protocol) as its transport protocol and encrypts all its messages with SSL (Secure Sockets Layer) or TLS (Transport Layer Security). In the above scenario, Lorenzo did not implement POP3S to provide secure email access and retrieval for email clients from email servers. Option D is incorrect, as it does not identify the remote authentication protocol employed by Lorenzo in the above scenario. IMAPS (Internet Message Access Protocol Secure) is a protocol that provides secure email access and management for email clients from email servers. IMAPS is based on the client-server model and works at the application layer of the OSI model. IMAPS uses TCP as its transport protocol and encrypts all its messages with SSL or TLS. In the above scenario, Lorenzo did not implement IMAPS to provide secure email access and management for email clients from email servers.
質問 # 25
You are a penetration tester working to test the user awareness of the employees of the client xyz. You harvested two employees' emails from some public sources and are creating a client-side backdoor to send it to the employees via email. Which stage of the cyber kill chain are you at?
- A. Command and control
- B. Weaponization
- C. Reconnaissance
- D. Exploitation
正解：B
解説：
Weaponization is the stage of the cyber kill chain that you are at in the above scenario. The cyber kill chain is a model that describes the phases of a cyberattack from the perspective of the attacker. The cyber kill chain consists of seven stages: reconnaissance, weaponization, delivery, exploitation, installation, command and control, and actions on objectives. Reconnaissance is the stage of the cyber kill chain that involves gathering information about the target, such as IP addresses, domain names, vulnerabilities, etc. Weaponization is the stage of the cyber kill chain that involves creating a malicious payload or tool that can exploit the target's vulnerabilities. Weaponization can include creating a client-side backdoor to send it to the employees via email. Delivery is the stage of the cyber kill chain that involves transmitting or delivering the weaponized payload or tool to the target's system or network. Exploitation is the stage of the cyber kill chain that involves executing or triggering the weaponized payload or tool on the target's system or network.
質問 # 26
Kason, a forensic officer, was appointed to investigate a case where a threat actor has bullied certain children online. Before proceeding legally with the case, Kason has documented all the supporting documents, including source of the evidence and its relevance to the case, before presenting it in front of the jury.
Which of the following rules of evidence was discussed in the above scenario?
- A. Authentic
- B. Admissible
- C. Understandable
- D. Reliable
正解：B
解説：
Admissible is the rule of evidence discussed in the above scenario. A rule of evidence is a criterion or principle that determines whether a piece of evidence can be used in a legal proceeding or investigation. Admissible is a rule of evidence that states that the evidence must be relevant, reliable, authentic, and understandable to be accepted by a court or a jury . Admissible also means that the evidence must be obtained legally and ethically, without violating any laws or rights. In the scenario, Kason has documented all the supporting documents, including source of the evidence and its relevance to the case, before presenting it in front of the jury, which means that he has followed the admissible rule of evidence. Authentic is a rule of evidence that states that the evidence must be original or verifiable as genuine and not altered or tampered with. Understandable is a rule of evidence that states that the evidence must be clear and comprehensible to the court or jury and not ambiguous or confusing. Reliable is a rule of evidence that states that the evidence must be consistent and trustworthy and not based on hearsay or speculation.
質問 # 27
Thomas, an employee of an organization, is restricted from accessing specific websites from his office system. He is trying to obtain admin credentials to remove the restrictions. While waiting for an opportunity, he sniffed communication between the administrator and an application server to retrieve the admin credentials. Identify the type of attack performed by Thomas in the above scenario.
- A. Vishing
- B. Phishing
- C. Dumpster diving
- D. Eavesdropping
正解：D
解説：
The correct answer is B, as it identifies the type of attack performed by Thomas in the above scenario. Eavesdropping is a type of attack that involves intercepting and listening to the communication between two parties without their knowledge or consent. Thomas performed eavesdropping by sniffing communication between the administrator and an application server to retrieve the admin credentials. Option A is incorrect, as it does not identify the type of attack performed by Thomas in the above scenario. Vishing is a type of attack that involves using voice calls to trick people into revealing sensitive information or performing malicious actions. Thomas did not use voice calls but sniffed network traffic. Option C is incorrect, as it does not identify the type of attack performed by Thomas in the above scenario. Phishing is a type of attack that involves sending fraudulent emails or messages that appear to be from legitimate sources to lure people into revealing sensitive information or performing malicious actions. Thomas did not send any emails or messages but sniffed network traffic. Option D is incorrect, as it does not identify the type of attack performed by Thomas in the above scenario. Dumpster diving is a type of attack that involves searching through trash or discarded items to find valuable information or resources. Thomas did not search through trash or discarded items but sniffed network traffic.
質問 # 28
Karter, a security professional, deployed a honeypot on the organization's network for luring attackers who attempt to breach the network. For this purpose, he configured a type of honeypot that simulates a real OS as well as the applications and services of a target network. Furthermore, the honeypot deployed by Karter only responds to pre-configured commands.
Identify the type of Honeypot deployed by Karter in the above scenario.
- A. Low-interaction honeypot
- B. Medium-interaction honeypot
- C. Pure honeypot
- D. High-interaction honeypot
正解：A
解説：
A low-interaction honeypot is a type of honeypot that simulates a real OS as well as the applications and services of a target network, but only responds to pre-configured commands. It is designed to capture basic information about the attacker, such as their IP address, tools, and techniques. A low-interaction honeypot is easier to deploy and maintain than a high-interaction honeypot, which fully emulates a real system and allows the attacker to interact with it. A pure honeypot is a real system that is intentionally vulnerable and exposed to attackers. A medium-interaction honeypot is a type of honeypot that offers more functionality and interactivity than a low-interaction honeypot, but less than a high-interaction honeypot.
質問 # 29
Alex, a certified security professional, works for both aggressor and defender teams. His team's main responsibility involves enhancing protection and boosting the security standards of the organization. Identify Alex's team in this scenario.
- A. Blue team
- B. White team
- C. Purple learn
- D. Red team
正解：C
解説：
Purple team is the team that Alex works for in this scenario. A team is a group of people that work together to achieve a common goal or objective. A team can have different types based on its role or function in an organization or a project. A purple team is a type of team that works for both aggressor and defender teams. A purple team can be used to enhance protection and boost the security standards of an organization by performing various tasks, such as testing, evaluating, improving, or integrating the security measures implemented by the defender team or exploited by the aggressor team. In the scenario, Alex is a certified security professional who works for both aggressor and defender teams. His team's main responsibility involves enhancing protection and boosting the security standards of the organization. This means that he works for a purple team. A white team is a type of team that acts as an observer or an arbitrator between the aggressor and defender teams. A white team can be used to monitor, evaluate, or adjudicate the performance or outcome of the aggressor and defender teams by providing feedback, guidance, or rules. A blue team is a type of team that acts as a defender or a protector of an organization's network or system. A blue team can be used to prevent, detect, or respond to attacks from external or internal threats by implementing various security measures, such as firewalls, antivirus, encryption, etc. A red team is a type of team that acts as an attacker or an adversary of an organization's network or system. A red team can be used to simulate realistic attacks from external or internal threats by exploiting various vulnerabilities, weaknesses, or gaps in the organization's security posture.
質問 # 30
Omar, an encryption specialist in an organization, was tasked with protecting low-complexity applications such as RFID tags, sensor-based applications, and other IbT-based applications. For this purpose, he employed an algorithm for all lower-powered devices that used less power and resources without compromising device security.
identify the algorithm employed by Omar in this scenario.
- A. Homomorphic encryption
- B. Quantum cryptography
- C. Lightweight cryptography
- D. Elliptic curve cryptography
正解：C
解説：
Lightweight cryptography is an algorithm that is designed for low-complexity applications such as RFID tags, sensor-based applications, and other IoT-based applications. Lightweight cryptography uses less power and resources without compromising device security. Lightweight cryptography can be implemented using symmetric-key algorithms, asymmetric-key algorithms, or hash functions1.
質問 # 31
Camden, a network specialist in an organization, monitored the behavior of the organizational network using SIFM from a control room. The SIEM detected suspicious activity and sent an alert to the camer a. Based on the severity of the incident displayed on the screen, Camden made the correct decision and immediately launched defensive actions to prevent further exploitation by attackers.
Which of the following SIEM functions allowed Camden to view suspicious behavior and make correct decisions during a security incident?
- A. Log Retention
- B. Dashboard
- C. Application log monitoring
- D. Data aggregation
正解：B
解説：
Dashboard is the SIEM function that allowed Camden to view suspicious behavior and make correct decisions during a security incident. SIEM (Security Information and Event Management) is a system or software that collects, analyzes, and correlates security data from various sources, such as logs, alerts, events, etc., and provides a centralized view and management of the security posture of a network or system. SIEM can be used to detect, prevent, or respond to security incidents or threats. SIEM consists of various functions or components that perform different tasks or roles. Dashboard is a SIEM function that provides a graphical user interface (GUI) that displays various security metrics, indicators, alerts, reports, etc., in an organized and interactive manner. Dashboard can be used to view suspicious behavior and make correct decisions during a security incident. In the scenario, Camden monitored the behavior of the organizational network using SIEM from a control room. The SIEM detected suspicious activity and sent an alert to Camden. Based on the severity of the incident displayed on the screen, Camden made the correct decision and immediately launched defensive actions to prevent further exploitation by attackers. This means that he used the dashboard function of SIEM for this purpose. Application log monitoring is a SIEM function that collects and analyzes application logs, which are records of events or activities that occur within an application or software. Log retention is an SIEM function that stores and preserves logs for a certain period of time or indefinitely for future reference or analysis. Data aggregation is an SIEM function that combines and normalizes data from different sources into a common format or structure.
質問 # 32
Kevin, a professional hacker, wants to penetrate CyberTech Inc.'s network. He employed a technique, using which he encoded packets with Unicode characters. The company's IDS cannot recognize the packet, but the target web server can decode them.
What is the technique used by Kevin to evade the IDS system?
- A. Urgency flag
- B. Session splicing
- C. Obfuscating
- D. Desynchronization
正解：C
解説：
Obfuscating is the technique used by Kevin to evade the IDS system in the above scenario. Obfuscating is a technique that involves encoding or modifying packets or data with various methods or characters to make them unreadable or unrecognizable by an IDS (Intrusion Detection System). Obfuscating can be used to bypass or evade an IDS system that relies on signatures or patterns to detect malicious activities. Obfuscating can include encoding packets with Unicode characters, which are characters that can represent various languages and symbols. The IDS system cannot recognize the packet, but the target web server can decode them and execute them normally. Desynchronization is a technique that involves creating discrepancies or inconsistencies between the state of a connection as seen by an IDS system and the state of a connection as seen by the end hosts. Desynchronization can be used to bypass or evade an IDS system that relies on stateful inspection to track and analyze connections. Desynchronization can include sending packets with invalid sequence numbers, which are numbers that indicate the order of packets in a connection. Session splicing is a technique that involves splitting or dividing packets or data into smaller fragments or segments to make them harder to detect by an IDS system. Session splicing can be used to bypass or evade an IDS system that relies on packet size or content to detect malicious activities. Session splicing can include sending packets with small MTU (Maximum Transmission Unit) values, which are values that indicate the maximum size of packets that can be transmitted over a network. An urgency flag is a flag in the TCP (Transmission Control Protocol) header that indicates that the data in the packet is urgent and should be processed immediately by the receiver. An urgency flag is not a technique to evade an IDS system, but it can be used to trigger an IDS system to generate an alert or a response.
質問 # 33
A software company is developing a new software product by following the best practices for secure application development. Dawson, a software analyst, is checking the performance of the application on the client's network to determine whether end users are facing any issues in accessing the application.
Which of the following tiers of a secure application development lifecycle involves checking the performance of the application?
- A. Development
- B. Staging
- C. Testing
- D. Quality assurance (QA)
正解：C
解説：
The testing tier of a secure application development lifecycle involves checking the performance of the application on the client's network to determine whether end users are facing any issues in accessing the application. Testing is a crucial phase of software development that ensures the quality, functionality, reliability, and security of the application. Testing can be done manually or automatically using various tools and techniques, such as unit testing, integration testing, system testing, regression testing, performance testing, usability testing, security testing, and acceptance testing
質問 # 34
Malachi, a security professional, implemented a firewall in his organization to trace incoming and outgoing traffic. He deployed a firewall that works at the session layer of the OSI model and monitors the TCP handshake between hosts to determine whether a requested session is legitimate.
Identify the firewall technology implemented by Malachi in the above scenario.
- A. Network address translation (NAT)
- B. Circuit-level gateways
- C. Next generation firewall (NGFW)
- D. Packet filtering
正解：B
解説：
A circuit-level gateway is a type of firewall that works at the session layer of the OSI model and monitors the TCP handshake between hosts to determine whether a requested session is legitimate. It does not inspect the contents of each packet, but rather relies on the session information to filter traffic
質問 # 35
Jordan, a network administrator in an organization, was instructed to identify network-related issues and improve network performance. While troubleshooting the network, he received a message indicating that the datagram could not be forwarded owing to the unavailability of IP-related services (such as FTP or web services) on the target host, which of the following network issues did Jordan find in this scenario?
- A. Unreachable networks
- B. Network cable is unplugged
- C. Destination unreachable message
- D. Time exceeded message
正解：C
解説：
Destination unreachable message is the network issue that Jordan found in this scenario. Destination unreachable message is a type of ICMP message that indicates that the datagram could not be forwarded owing to the unavailability of IP-related services (such as FTP or web services) on the target host. Destination unreachable message can be caused by various reasons, such as incorrect routing, firewall blocking, or host configuration problems1.
質問 # 36
An MNC hired Brandon, a network defender, to establish secured VPN communication between the company's remote offices. For this purpose, Brandon employed a VPN topology where all the remote offices communicate with the corporate office but communication between the remote offices is denied.
Identify the VPN topology employed by Brandon in the above scenario.
- A. Full-mesh VPN topology
- B. Star topology
- C. Point-to-Point VPN topology
- D. Hub-and-Spoke VPN topology
正解：D
解説：
A hub-and-spoke VPN topology is a type of VPN topology where all the remote offices communicate with the corporate office, but communication between the remote offices is denied. The corporate office acts as the hub, and the remote offices act as the spokes. This topology reduces the number of VPN tunnels required and simplifies the management of VPN policies. A point-to-point VPN topology is a type of VPN topology where two endpoints establish a direct VPN connection. A star topology is a type of VPN topology where one endpoint acts as the central node and connects to multiple other endpoints. A full-mesh VPN topology is a type of VPN topology where every endpoint connects to every other endpoint.
質問 # 37
in a security incident, the forensic investigation has isolated a suspicious file named "security_update.exe". You are asked to analyze the file in the Documents folder of the "Attacker Machine-1" to determine whether it is malicious. Analyze the suspicious file and identify the malware signature. (Practical Question)
- A. Stuxnet
- B. ZEUS
- C. KLEZ
- D. Conficker
正解：A
解説：
Stuxnet is the malware signature of the suspicious file in the above scenario. Malware is malicious software that can harm or compromise the security or functionality of a system or network. Malware can include various types, such as viruses, worms, trojans, ransomware, spyware, etc. Malware signature is a unique pattern or characteristic that identifies a specific malware or malware family. Malware signature can be used to detect or analyze malware by comparing it with known malware signatures in databases or repositories. To analyze the suspicious file and identify the malware signature, one has to follow these steps:
Navigate to Documents folder of Attacker Machine-1.
Right-click on security_update.exe file and select Scan with VirusTotal option.
Wait for VirusTotal to scan the file and display the results.
Observe the detection ratio and details.
The detection ratio is 59/70, which means that 59 out of 70 antivirus engines detected the file as malicious. The details show that most antivirus engines detected the file as Stuxnet, which is a malware signature of a worm that targets industrial control systems (ICS). Stuxnet can be used to sabotage or damage ICS by modifying their code or behavior. Therefore, Stuxnet is the malware signature of the suspicious file. KLEZ is a malware signature of a worm that spreads via email and network shares. KLEZ can be used to infect or overwrite files, disable antivirus software, or display fake messages. ZEUS is a malware signature of a trojan that targets banking and financial systems. ZEUS can be used to steal or modify banking credentials, perform fraudulent transactions, or install other malware. Conficker is a malware signature of a worm that exploits a vulnerability in Windows operating systems. Conficker can be used to create a botnet, disable security services, or download other malware
質問 # 38
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