The answer is a fileless attack, specifically PowerShell in-memory execution. This is correct because the exhibit shows PowerShell being launched directly in memory without writing any new payload to disk, which is the defining technical characteristic of a fileless attack. By exploiting a trusted system tool like PowerShell, the malware executes malicious code entirely in RAM, bypassing traditional signature-based antivirus that scans files on disk. On the Security+ SY0-701 exam, this scenario tests your understanding of how modern malware evades detection by living off the land—a common trap is assuming any PowerShell activity is benign, when in fact attackers use it to avoid forensic artifacts. Remember the key distinction: if no new file hits the disk, it’s fileless. A useful memory tip is “No disk, no risk—fileless in the RAM disk.”
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.
Exhibit
EDR timeline from a finance laptop:
08:14:02 winword.exe launched powershell.exe
08:14:03 powershell.exe executed with arguments: -WindowStyle Hidden -NoProfile -EncodedCommand SQBFAFgAKAAuLi4=
08:14:05 No new executable written to disk
08:14:08 Outbound HTTPS connection to 198.51.100.77 over port 443
08:14:11 User reports a document opened normally, but the machine began showing unusual network activity
Based on the exhibit, what type of malware behavior is most likely occurring?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
EDR timeline from a finance laptop:
08:14:02 winword.exe launched powershell.exe
08:14:03 powershell.exe executed with arguments: -WindowStyle Hidden -NoProfile -EncodedCommand SQBFAFgAKAAuLi4=
08:14:05 No new executable written to disk
08:14:08 Outbound HTTPS connection to 198.51.100.77 over port 443
08:14:11 User reports a document opened normally, but the machine began showing unusual network activity
A
Ransomware, because the endpoint made an outbound connection after opening a document.
Why wrong: Ransomware usually shows file encryption, ransom notes, or mass file renaming. Those symptoms are not present here, so the evidence does not point to encryption-based extortion.
B
Fileless attack, because PowerShell was launched in memory with no new payload written to disk.
This is a fileless attack because the malicious activity relies on script execution rather than a traditional dropped executable. The encoded PowerShell command, hidden execution, and absence of a new file on disk strongly indicate memory-based or script-based malware behavior that can evade basic file scanning.
C
Spyware, because the laptop made an encrypted outbound connection.
Why wrong: Spyware focuses on covert information collection, but the key evidence here is how the code executed. The exhibit does not show credential theft, browser monitoring, or keylogging artifacts that would clearly support spyware.
D
Worm activity, because the laptop communicated with an external IP address.
Why wrong: A worm is typically characterized by self-replication and spreading to other systems. The exhibit shows script execution from a document, but it does not show lateral spread or replication behavior.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Fileless attack, because PowerShell was launched in memory with no new payload written to disk.
The exhibit shows PowerShell being launched in memory with no new payload written to disk, which is the hallmark of a fileless attack. Fileless malware exploits legitimate system tools like PowerShell to execute malicious code directly in memory, evading traditional signature-based detection that relies on scanning files on disk.
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.
✗
Ransomware, because the endpoint made an outbound connection after opening a document.
Why it's wrong here
Ransomware usually shows file encryption, ransom notes, or mass file renaming. Those symptoms are not present here, so the evidence does not point to encryption-based extortion.
✓
Fileless attack, because PowerShell was launched in memory with no new payload written to disk.
Why this is correct
This is a fileless attack because the malicious activity relies on script execution rather than a traditional dropped executable. The encoded PowerShell command, hidden execution, and absence of a new file on disk strongly indicate memory-based or script-based malware behavior that can evade basic file scanning.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Spyware, because the laptop made an encrypted outbound connection.
Why it's wrong here
Spyware focuses on covert information collection, but the key evidence here is how the code executed. The exhibit does not show credential theft, browser monitoring, or keylogging artifacts that would clearly support spyware.
✗
Worm activity, because the laptop communicated with an external IP address.
Why it's wrong here
A worm is typically characterized by self-replication and spreading to other systems. The exhibit shows script execution from a document, but it does not show lateral spread or replication behavior.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates see an outbound connection and immediately assume ransomware or spyware, but the key indicator is PowerShell executing in memory with no disk write, which is the defining characteristic of a fileless attack.
Trap categories for this question
Command / output trap
Ransomware usually shows file encryption, ransom notes, or mass file renaming. Those symptoms are not present here, so the evidence does not point to encryption-based extortion.
Detailed technical explanation
How to think about this question
Fileless malware often leverages PowerShell's ability to execute scripts in memory using the `-EncodedCommand` parameter or by downloading and running payloads via `Invoke-Expression` (IEX) without writing to disk. This technique bypasses Windows Defender's file-based scanning and can be detected only through behavioral analysis, such as monitoring for suspicious PowerShell process creation or network connections from `powershell.exe`. In real-world attacks, threat actors like those behind Emotet have used fileless methods to drop additional payloads like Cobalt Strike beacons.
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 team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SY0-701 question in full detail.
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, because PowerShell was launched in memory with no new payload written to disk. — The exhibit shows PowerShell being launched in memory with no new payload written to disk, which is the hallmark of a fileless attack. Fileless malware exploits legitimate system tools like PowerShell to execute malicious code directly in memory, evading traditional signature-based detection that relies on scanning files on disk.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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