- A
DDoS, low
Why wrong: DDoS is a denial of service attack, not file encryption.
- B
Malware, moderate
Ransomware is malware, and a single workstation infection without critical data impact is moderate.
- C
Data breach, high
Why wrong: Data breach involves unauthorized access to sensitive data, not necessarily ransomware.
- D
Insider threat, high
Why wrong: Insider threat involves malicious actions by an employee, not necessarily ransomware.
Question 451 of 1,000
CS0-003 Incident Response and Management Practice Question
This CS0-003 practice question tests your understanding of incident response and management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A security analyst is classifying an incident where an employee's workstation is infected with ransomware that encrypts files and displays a ransom note. Which incident category and severity level best describe this scenario?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Malware, moderate
Option B is correct because ransomware is a specific subtype of malware that encrypts files and demands payment, making 'Malware' the appropriate incident category. The severity is 'moderate' because while the infection impacts a single workstation and causes data loss, it does not immediately compromise the entire network or expose sensitive data at scale, aligning with typical moderate-severity criteria for isolated malware incidents.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
DDoS, low
Why it's wrong here
DDoS is a denial of service attack, not file encryption.
- ✓
Malware, moderate
Why this is correct
Ransomware is malware, and a single workstation infection without critical data impact is moderate.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Data breach, high
Why it's wrong here
Data breach involves unauthorized access to sensitive data, not necessarily ransomware.
- ✗
Insider threat, high
Why it's wrong here
Insider threat involves malicious actions by an employee, not necessarily ransomware.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between 'Malware' and 'Data breach' by making candidates assume that file encryption automatically implies data exfiltration, but ransomware typically does not exfiltrate data unless it is a double-extortion variant.
Detailed technical explanation
How to think about this question
Ransomware typically uses asymmetric encryption (e.g., RSA-2048 for the key exchange and AES-256 for file encryption) to lock files, and the ransom note often includes payment instructions via cryptocurrency. In real-world incidents, even a single workstation infection can escalate if the ransomware spreads via SMB or RDP to other systems, but the initial classification as 'moderate' assumes containment is possible. The CS0-003 framework categorizes severity based on impact scope—single host vs. multiple hosts—and data sensitivity, not just the presence of encryption.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A SOC analyst notices unusual lateral movement in the network at 2 AM. The IR playbook dictates: identify and contain (isolate the affected machine), then eradicate (remove the malware), then recover (restore from backup), then document. Skipping containment before eradication risks the attacker regaining access. Questions like this test the sequence and rationale of incident response phases.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Incident Response and Management — study guide chapter
Learn the concepts, then practise the questions
- →
Incident Response and Management practice questions
Targeted practice on this topic area only
- →
All CS0-003 questions
1,000 questions across all exam domains
- →
CompTIA CySA+ CS0-003 study guide
Full concept coverage aligned to exam objectives
- →
CS0-003 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related CS0-003 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Security Operations practice questions
Practise CS0-003 questions linked to Security Operations.
Vulnerability Management practice questions
Practise CS0-003 questions linked to Vulnerability Management.
Incident Response and Management practice questions
Practise CS0-003 questions linked to Incident Response and Management.
Reporting and Communication practice questions
Practise CS0-003 questions linked to Reporting and Communication.
CompTIA A+ hardware practice questions
Practise CS0-003 questions linked to CompTIA A+ hardware.
CompTIA A+ mobile devices practice questions
Practise CS0-003 questions linked to CompTIA A+ mobile devices.
CompTIA A+ networking practice questions
Practise CS0-003 questions linked to CompTIA A+ networking.
CompTIA A+ operating systems practice questions
Practise CS0-003 questions linked to CompTIA A+ operating systems.
CompTIA A+ security practice questions
Practise CS0-003 questions linked to CompTIA A+ security.
CompTIA A+ software troubleshooting questions
Practise CS0-003 questions linked to CompTIA A+ software troubleshooting questions.
CompTIA A+ operational procedures questions
Practise CS0-003 questions linked to CompTIA A+ operational procedures questions.
Practice this exam
Start a free CS0-003 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this CS0-003 question test?
Incident Response and Management — This question tests Incident Response and Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Malware, moderate — Option B is correct because ransomware is a specific subtype of malware that encrypts files and demands payment, making 'Malware' the appropriate incident category. The severity is 'moderate' because while the infection impacts a single workstation and causes data loss, it does not immediately compromise the entire network or expose sensitive data at scale, aligning with typical moderate-severity criteria for isolated malware incidents.
What should I do if I get this CS0-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This CS0-003 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CS0-003 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.