- A
Worm behavior that is spreading through SMB shares
Why wrong: Worms are typically self-replicating and spread to other systems, which is not the primary pattern here.
- B
Fileless attack using trusted system tools to run malicious code in memory
This matches a fileless attack because the malicious activity relies on built-in tools like PowerShell and rundll32 rather than an obvious executable on disk. The alert shows code being fetched and executed from memory, which often evades traditional file-based antivirus detection. The fact that the behavior disappears after reboot further supports a memory-resident, fileless technique.
- C
Rootkit that is hiding itself by modifying kernel drivers
Why wrong: Rootkits focus on stealth and hiding persistence, often through kernel-level tampering, which is not clearly shown here.
- D
Trojan that can only run after a user manually opens a malicious attachment
Why wrong: Trojans commonly disguise themselves as legitimate software, but this scenario highlights script-based, living-off-the-land execution instead.
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.
A SOC analyst reviews an alert on a workstation where PowerShell launched from a scheduled task, downloaded an encoded command from a remote server, and then spawned rundll32.exe. Traditional antivirus did not flag any files on disk, and the activity stops after rebooting the host. Which type of malware behavior best fits this event?
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
Fileless attack using trusted system tools to run malicious code in memory
The attack uses PowerShell to download and execute an encoded command directly in memory, then spawns rundll32.exe—both are trusted Microsoft binaries. No files are written to disk, and the activity ceases after reboot, which are hallmarks of a fileless malware attack that operates entirely in volatile memory.
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.
- ✗
Worm behavior that is spreading through SMB shares
Why it's wrong here
Worms are typically self-replicating and spread to other systems, which is not the primary pattern here.
- ✓
Fileless attack using trusted system tools to run malicious code in memory
Why this is correct
This matches a fileless attack because the malicious activity relies on built-in tools like PowerShell and rundll32 rather than an obvious executable on disk. The alert shows code being fetched and executed from memory, which often evades traditional file-based antivirus detection. The fact that the behavior disappears after reboot further supports a memory-resident, fileless technique.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Rootkit that is hiding itself by modifying kernel drivers
Why it's wrong here
Rootkits focus on stealth and hiding persistence, often through kernel-level tampering, which is not clearly shown here.
- ✗
Trojan that can only run after a user manually opens a malicious attachment
Why it's wrong here
Trojans commonly disguise themselves as legitimate software, but this scenario highlights script-based, living-off-the-land execution instead.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may associate any scheduled task or PowerShell activity with a worm or Trojan, but the key differentiator is the absence of disk writes and the use of memory-only execution, which is the defining characteristic of a fileless attack.
Trap categories for this question
Command / output trap
Rootkits focus on stealth and hiding persistence, often through kernel-level tampering, which is not clearly shown here.
Scenario analysis trap
Trojans commonly disguise themselves as legitimate software, but this scenario highlights script-based, living-off-the-land execution instead.
Detailed technical explanation
How to think about this question
Fileless malware leverages living-off-the-land binaries (LoLBins) like PowerShell and rundll32.exe to execute malicious code in memory, bypassing disk-based antivirus scans. The encoded command is often Base64 or compressed to evade network detection, and rundll32.exe can be used to load a malicious DLL directly from memory via techniques like DLL side-loading or reflective DLL injection. In real-world attacks, such as those using Cobalt Strike or PowerShell Empire, this pattern is common for initial access and lateral movement without writing artifacts to disk.
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
Got this wrong? Here's your next step.
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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: Fileless attack using trusted system tools to run malicious code in memory — The attack uses PowerShell to download and execute an encoded command directly in memory, then spawns rundll32.exe—both are trusted Microsoft binaries. No files are written to disk, and the activity ceases after reboot, which are hallmarks of a fileless malware attack that operates entirely in volatile memory.
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.
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
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Last reviewed: Jun 11, 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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