The correct interpretation is that the file may be malicious or legitimate, so further analysis is needed. A valid digital signature confirms the file’s integrity—it has not been altered since signing—but it does not verify the publisher’s trustworthiness. An untrusted publisher means the signing certificate is absent from the system’s trusted root store or has been flagged by security policy, so the file could be a legitimate new or self-signed application, or a malicious one signed with a stolen certificate. On the Cisco CyberOps Associate 200-201 exam, this question tests your ability to distinguish between signature validity and publisher trust, a common trap where students assume a valid signature equals safety. Remember: valid means untampered, not trustworthy. Memory tip: “Valid signature, still vet the signature’s source.”
200-201 Host-Based Analysis Practice Question
This 200-201 practice question tests your understanding of host-based analysis. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 host-based analysis tool reports that a file has a digital signature that is valid but from an untrusted publisher. What should the analyst interpret from this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The file may be malicious or legitimate; further analysis is needed
A valid digital signature confirms the file has not been tampered with since signing, but it does not guarantee the publisher is trustworthy. An untrusted publisher means the signing certificate is not in the system's trusted root store or has been flagged by a security policy, so the file could be either legitimate (e.g., from a new or self-signed publisher) or malicious (e.g., signed with a stolen certificate). Therefore, further analysis—such as checking the file's reputation, behavior, or origin—is required to determine its safety.
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 file is definitely malicious because the publisher is untrusted
Why it's wrong here
Signature integrity is valid; untrusted means not in trusted store, but could be legitimate software from a new vendor.
✗
The file's signature was revoked
Why it's wrong here
Not necessarily; it says valid but untrusted, not revoked.
✓
The file may be malicious or legitimate; further analysis is needed
Why this is correct
The signature chain is technically valid, but the publisher is not trusted by default. Requires contextual analysis.
Related concept
Read the scenario before looking for a memorised answer.
✗
The file is definitely safe because the signature is valid
Why it's wrong here
A valid signature does not guarantee safety; malware can be signed.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between signature validity (cryptographic integrity) and publisher trust (certificate chain trust), leading candidates to mistakenly equate a valid signature with safety or an untrusted publisher with guaranteed malice.
Detailed technical explanation
How to think about this question
Digital signatures rely on a chain of trust: the signing certificate must chain to a trusted root CA in the system's certificate store. If the root is not trusted (e.g., removed or not installed), the signature is still cryptographically valid but the publisher is considered untrusted. In Windows, this is indicated by a 'Unknown Publisher' warning in file properties, and tools like Sigcheck can show the certificate chain and trust status. Real-world scenarios include malware signed with stolen code-signing certificates from legitimate but compromised publishers, where the signature is valid but the publisher should not be trusted.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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.
Host-Based Analysis — This question tests Host-Based Analysis — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The file may be malicious or legitimate; further analysis is needed — A valid digital signature confirms the file has not been tampered with since signing, but it does not guarantee the publisher is trustworthy. An untrusted publisher means the signing certificate is not in the system's trusted root store or has been flagged by a security policy, so the file could be either legitimate (e.g., from a new or self-signed publisher) or malicious (e.g., signed with a stolen certificate). Therefore, further analysis—such as checking the file's reputation, behavior, or origin—is required to determine its safety.
What should I do if I get this 200-201 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.
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Question Discussion
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