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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Security Operations | 33% | - Threat intelligence usage
|
| Topic 2: Vulnerability Management | 34% | - Vulnerability identification
|
| Topic 3: Incident Response and Management | 33% | - Incident handling lifecycle
|
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NEW QUESTION # 369
A cybersecurity analyst is recommending a solution to ensure emails that contain links or attachments are tested before they reach a mail server. Which of the following will the analyst most likely recommend?
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
To "test" links/attachments before they reach the mail server, the organization needs a control that can execute or detonate suspicious content in a controlled environment and observe behavior. That is exactly what sandboxing does.
Secbay Press defines sandboxing as executing suspicious files/applications in a virtualized environment to observe behavior (i.e., safe testing/detonation):
Exact extract (Secbay Press): "Joe Sandbox is a malware analysis platform that utilizes virtualized environments (sandboxing) to execute and observe the behavior of suspicious files or applications." The official CS0-003 objectives list Sandboxing (Joe Sandbox / Cuckoo Sandbox) under tools used to determine malicious activity, aligning with the exam's expectation that sandboxing is used to analyze suspicious content.
Why the other choices are not correct:
B (MFA): helps protect accounts, but doesn't "test" attachments/links.
C (DKIM): authenticates sender domain and message integrity, but doesn't detonate or test payloads.
D (Vulnerability scan): targets hosts/services/configurations, not real-time detonation of email attachments/links.
Reference (CompTIA CySA+ CS0-003 documents / study guides used):
Secbay Press, CompTIA CySA+ Exam Prep Guide (CS0-003): sandboxing executes/observes suspicious files in a virtualized environment CompTIA CySA+ CS0-003 Exam Objectives v4.0: includes sandboxing tools (Joe Sandbox, Cuckoo Sandbox) Chapple/Seidl, CompTIA CySA+ Study Guide (CS0-003): DKIM is for verifying sender/domain integrity, not payload testing
NEW QUESTION # 370
An analyst is suddenly unable to enrich data from the firewall. However, the other open intelligence feeds continue to work. Which of the following is the most likely reason the firewall feed stopped working?
Answer: B
Explanation:
The firewall certificate expired. If the firewall uses a certificate to authenticate and encrypt the feed, and the certificate expires, the feed will stop working until the certificate is renewed or replaced. This can affect the data enrichment process and the security analysis. References: CompTIA CySA+ Study Guide: Exam CS0-
003, 3rd Edition, Chapter 4: Security Operations and Monitoring, page 161.
NEW QUESTION # 371
Due to reports of unauthorized activity that was occurring on the internal network, an analyst is performing a network discovery. The analyst runs an Nmap scan against a corporate network to evaluate which devices were operating in the environment. Given the following output:
Which of the following choices should the analyst look at first?
Answer: C
Explanation:
The analyst should look at p4wnp1_aloa.lan (192.168.86.56) first, as this is the most suspicious device on the network. P4wnP1 ALOA is a tool that can be used to create a malicious USB device that can perform various attacks, such as keystroke injection, network sniffing, man-in-the-middle, or backdoor creation. The presence of a device with this name on the network could indicate that an attacker has plugged in a malicious USB device to a system and gained access to the network. Official References:
https://github.com/mame82/P4wnP1_aloa
NEW QUESTION # 372
An analyst is reviewing processes running on a Windows host. The analyst reviews the following information:
Which of the following processes should the analyst review first?
Answer: D
Explanation:
The analyst should review PID 768 first because it is the parent process of another suspicious process (PID
1100) and it is also highly suspicious itself due to its unexpected file path.
Why PID 768 is the best first process to review
* Path anomaly (strong IoC): Legitimate Windows binaries like calc.exe and cmd.exe are normally found in trusted OS directories (e.g., C:\Windows\System32\). In the table, both CALC.exe and CMD.exe appear in a user's Documents folder (C:\Users\JDoe\Documents\...). That is a classic sign of masquerading (a malicious binary using a legitimate-sounding name). The All-in-One guide explicitly describes how attackers disguise malicious processes by using legitimate-sounding names and mimicking system processes.
* Parent-child relationship (investigation priority): PID 1100 (Documents\CMD.exe) is suspicious, but it is a child of PID 768 (Documents\CALC.exe). Investigating the parent first helps you understand what spawned the suspicious child, what activity preceded it, and whether PID 768 is the root of the execution chain. The All-in-One guide highlights that analysts should examine process parent-child relationships and investigate unexpected dependencies as a way to detect malicious activity:Exact extract (All-in-One Exam Guide): "Analyze process dependencies Examine process parent-child relationships and investigate any unexpected or unusual dependencies that may indicate malicious activity." It also emphasizes monitoring grandparent/parent/child relationships to detect deviations from normal process hierarchies:Exact extract (All-in-One Exam Guide): "Monitoring the relationships between processes, particularly grandparent, parent, and child relationships, can be a valuable method for detecting unusual activity."
* Abused/LOLBIN context: cmd.exe is a commonly abused Windows utility in attacks. The Sybex Study Guide notes that attackers often abuse built-in tools and that abnormal OS process behavior involving tools like cmd.exe can indicate compromise:Exact extract (Sybex Study Guide): "For Windows systems, a handful of built-in tools are most commonly associated with attacks like these, including cmd.exe..." Why the other options are less correct
* A (533) and B (740) are running from C:\Windows\System32\... which is the expected location for legitimate Windows binaries in normal circumstances, so they're less suspicious than the copies running from a user Documents folder.
* D (1100) is suspicious, but it is a child of PID 768. Investigating 768 first helps determine the origin and execution chain that led to the suspicious cmd instance.
References (CompTIA CySA+ CS0-003 documents / study guides used):
* Mya Heath et al., CompTIA CySA+ All-in-One Exam Guide (CS0-003): parent/child process dependency analysis; process hierarchy monitoring; masquerading techniques
* Mike Chapple & David Seidl, CompTIA CySA+ Study Guide (CS0-003): abnormal OS process behavior; cmd.exe commonly associated with attacks
NEW QUESTION # 373
The security team reviews a web server for XSS and runs the following Nmap scan:
Which of the following most accurately describes the result of the scan?
Answer: C
Explanation:
A cross-site scripting (XSS) attack is a type of web application attack that injects malicious code into a web page that is then executed by the browser of a victim user. A reflected XSS attack is a type of XSS attack where the malicious code is embedded in a URL or a form parameter that is sent to the web server and then reflected back to the user's browser. In this case, the Nmap scan shows that the web server is vulnerable to a reflected XSS attack, as it returns the characters > and " without any filtering or encoding. The vulnerable parameter is id in the URL http://172.31.15.2/1.php?id=2.
NEW QUESTION # 374
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