- A
The daily domain names, because they are the easiest indicator to find.
Why wrong: Daily domains are useful for tracking activity, but they change frequently and are not the most stable block option in this scenario.
- B
The malware file hash, because it remains consistent across incidents.
A consistent file hash is a stable indicator of the malicious sample and is easier to block or detect across multiple cases.
- C
The color of the phishing email, because visual style is unique to the attacker.
Why wrong: Email appearance is not a reliable technical indicator, and color alone is not useful for blocking malware or infrastructure.
- D
The user's browser homepage, because attackers often change it after infection.
Why wrong: Browser homepage changes may happen after infection, but they are a symptom, not a dependable indicator to block attacker activity.
SY0-701 Threats, Vulnerabilities, and Mitigations Practice Question
This SY0-701 practice question tests your understanding of threats, vulnerabilities, and mitigations. 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.
Threat intelligence shows an attacker changes the domain name every day, but the malware file hash stays the same across incidents. What should defenders prioritize for blocking?
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
The malware file hash, because it remains consistent across incidents.
Option B is correct because the malware file hash (e.g., MD5, SHA-1, or SHA-256) is a static, deterministic value derived from the malware's binary content. Since the attacker reuses the same malware across incidents, the hash remains consistent, making it a reliable indicator of compromise (IOC) for blocking via hash-based allow/deny lists in endpoint protection or network security controls. In contrast, domain names change daily (fast flux), so blocking them is less sustainable and requires constant updates.
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.
- ✗
The daily domain names, because they are the easiest indicator to find.
Why it's wrong here
Daily domains are useful for tracking activity, but they change frequently and are not the most stable block option in this scenario.
- ✓
The malware file hash, because it remains consistent across incidents.
Why this is correct
A consistent file hash is a stable indicator of the malicious sample and is easier to block or detect across multiple cases.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The color of the phishing email, because visual style is unique to the attacker.
Why it's wrong here
Email appearance is not a reliable technical indicator, and color alone is not useful for blocking malware or infrastructure.
- ✗
The user's browser homepage, because attackers often change it after infection.
Why it's wrong here
Browser homepage changes may happen after infection, but they are a symptom, not a dependable indicator to block attacker activity.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume domain names are the easiest to block because they are visible in logs, but the question tests the principle of prioritizing stable, consistent indicators over ephemeral ones, and CompTIA often tests this by contrasting static hashes with dynamic domains in fast-flux scenarios.
Trap categories for this question
Scenario analysis trap
Daily domains are useful for tracking activity, but they change frequently and are not the most stable block option in this scenario.
Detailed technical explanation
How to think about this question
Under the hood, file hashes are computed using cryptographic hash functions like SHA-256, which produce a fixed-length output unique to the file's binary data; even a single bit change yields a completely different hash. In real-world scenarios, attackers often use polymorphic code or packers to change the hash, but when they reuse the exact same binary (e.g., a known ransomware variant), the hash remains a reliable block. Defenders can automate hash-based blocking via threat intelligence feeds (e.g., STIX/TAXII) and integrate with SIEM or EDR tools to enforce deny lists at scale.
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
An employee at a financial services firm receives an email that appears to come from the IT helpdesk, asking them to reset their password via a link. The link leads to a convincing fake portal that harvests credentials. Security teams use phishing simulations and security-awareness training to reduce this attack vector. Questions like this test whether you can identify social engineering techniques and appropriate controls.
What to study next
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FAQ
Questions learners often ask
What does this SY0-701 question test?
Threats, Vulnerabilities, and Mitigations — This question tests Threats, Vulnerabilities, and Mitigations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The malware file hash, because it remains consistent across incidents. — Option B is correct because the malware file hash (e.g., MD5, SHA-1, or SHA-256) is a static, deterministic value derived from the malware's binary content. Since the attacker reuses the same malware across incidents, the hash remains consistent, making it a reliable indicator of compromise (IOC) for blocking via hash-based allow/deny lists in endpoint protection or network security controls. In contrast, domain names change daily (fast flux), so blocking them is less sustainable and requires constant updates.
What should I do if I get this SY0-701 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
This SY0-701 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 SY0-701 exam.
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