- A
Rootkit, because it hides processes, files, or activity from standard system tools.
Rootkits are designed to conceal malware and attacker activity by altering how the operating system reports processes, files, or logs.
- B
Spyware, because it secretly collects user information and browser data.
Why wrong: Spyware is focused on surveillance and data theft, but the hidden process and tampered visibility point more strongly to concealment mechanisms.
- C
Worm, because it spreads quickly through network shares and email attachments.
Why wrong: A worm's defining trait is self-propagation, which does not explain hidden processes and suppressed visibility on one host.
- D
Trojan, because it masquerades as legitimate software to trick the user.
Why wrong: A trojan may be the delivery method, but the signature symptom here is stealth and interference with system visibility, which is characteristic of a rootkit.
Quick Answer
The answer is a rootkit, because it is specifically designed to hide processes, files, and logs from standard system tools. A rootkit achieves this by intercepting system calls at the kernel or user-mode level, filtering out its own artifacts so that tools like Task Manager, File Explorer, and Event Viewer never see them. On the Security+ SY0-701 exam, this scenario tests your understanding of how rootkits subvert visibility—a key distinction from viruses or Trojans, which do not inherently hide their presence. A common trap is confusing rootkits with fileless malware, but fileless malware operates in memory without persistent files, whereas a rootkit actively conceals both files and processes. For the exam, remember the mnemonic “HFL” for Hides Files and Logs—if a process, file, and log all vanish simultaneously from user-mode tools, think rootkit.
SY0-701 Threats, Vulnerabilities, and Mitigations Practice Question
This SY0-701 practice question tests your understanding of threats, vulnerabilities, and mitigations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
After an endpoint cleanup, an EDR agent shows inconsistent results: a suspicious process does not appear in normal task listings, a file in System32 is hidden from user-mode tools, and some security logs stop recording events at the same time. Which malware type best matches these symptoms?
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
Rootkit, because it hides processes, files, or activity from standard system tools.
A rootkit is designed to hide its presence and the presence of associated processes, files, and system activities from standard operating system tools and user-mode APIs. The symptoms described—a process invisible to task listings, a hidden file in System32, and security logs ceasing to record events—are classic indicators of kernel-mode or user-mode rootkit behavior that intercepts system calls to filter out its own artifacts.
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.
- ✓
Rootkit, because it hides processes, files, or activity from standard system tools.
Why this is correct
Rootkits are designed to conceal malware and attacker activity by altering how the operating system reports processes, files, or logs.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Spyware, because it secretly collects user information and browser data.
Why it's wrong here
Spyware is focused on surveillance and data theft, but the hidden process and tampered visibility point more strongly to concealment mechanisms.
- ✗
Worm, because it spreads quickly through network shares and email attachments.
Why it's wrong here
A worm's defining trait is self-propagation, which does not explain hidden processes and suppressed visibility on one host.
- ✗
Trojan, because it masquerades as legitimate software to trick the user.
Why it's wrong here
A trojan may be the delivery method, but the signature symptom here is stealth and interference with system visibility, which is characteristic of a rootkit.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the 'hiding' behavior of a rootkit with the 'deception' of a trojan or the 'collection' of spyware, but only a rootkit specifically subverts the OS's own APIs to conceal its presence from standard administrative tools.
Detailed technical explanation
How to think about this question
Rootkits achieve stealth by hooking system service dispatch tables (e.g., SSDT in Windows) or using direct kernel object manipulation (DKOM) to remove their processes from the EPROCESS list. They may also filter IRPs (I/O Request Packets) to hide files from directory enumeration calls like NtQueryDirectoryFile. In real-world scenarios, rootkits like TDL4 or Alureon have used bootkit techniques to load before the OS, making detection by traditional EDR agents difficult without memory forensics or secure boot validation.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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: Rootkit, because it hides processes, files, or activity from standard system tools. — A rootkit is designed to hide its presence and the presence of associated processes, files, and system activities from standard operating system tools and user-mode APIs. The symptoms described—a process invisible to task listings, a hidden file in System32, and security logs ceasing to record events—are classic indicators of kernel-mode or user-mode rootkit behavior that intercepts system calls to filter out its own artifacts.
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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