This CS0-003 practice question tests your understanding of security operations. 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 user opens an invoice document and shortly afterward the endpoint runs wscript.exe from the user's profile. Which detection logic is most relevant?
Office document spawning a script interpreter from a user context
Office-to-script process chains are common initial execution patterns for phishing payloads.
A password expiry warning
Why wrong: Password warnings are unrelated to script execution.
High CPU usage on the print server
Why wrong: Print server CPU does not explain the user's suspicious process chain.
Successful DHCP renewal
Why wrong: DHCP renewal is normal network operation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Office document spawning a script interpreter from a user context
The correct detection logic is 'Office document spawning a script interpreter from a user context' because the scenario describes a classic phishing attack where a malicious macro or embedded script in an invoice document launches wscript.exe (a Windows Script Host interpreter) from the user's profile directory. This behavior is a strong indicator of script-based malware execution, as legitimate Office documents rarely spawn script interpreters directly from user-writable paths. The detection logic specifically targets the parent-child process relationship between an Office application (e.g., WINWORD.EXE, EXCEL.EXE) and wscript.exe, which is a common technique used by attackers to bypass application whitelisting and execute arbitrary code.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Office document spawning a script interpreter from a user context
Why this is correct
Office-to-script process chains are common initial execution patterns for phishing payloads.
Related concept
Read the scenario before looking for a memorised answer.
A password expiry warning
Why it's wrong here
Password warnings are unrelated to script execution.
High CPU usage on the print server
Why it's wrong here
Print server CPU does not explain the user's suspicious process chain.
Successful DHCP renewal
Why it's wrong here
DHCP renewal is normal network operation.
Common exam traps
Cisco often tests the distinction between process execution anomalies and unrelated system events, so the trap here is that candidates may confuse a script interpreter launch with generic system performance issues or authentication events, missing the critical parent-child process chain that defines the attack vector.
Detailed technical explanation
Under the hood, this attack leverages the Windows Script Host (WSH) engine, where wscript.exe executes VBScript or JScript code embedded in the Office document via macros or OLE objects. A subtle behavior is that wscript.exe may be launched with command-line arguments pointing to a script file in the user's %TEMP% or %APPDATA% directory, which is often obfuscated to evade signature-based detection. In real-world scenarios, this technique is used in Emotet or Dridex campaigns, where the script downloads additional payloads from remote servers, and detection relies on Sysmon Event ID 1 (Process Creation) with specific parent-child process relationships.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
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FAQ
Security Operations — This question tests Security Operations — Read the scenario before looking for a memorised answer..
The correct answer is: Office document spawning a script interpreter from a user context — The correct detection logic is 'Office document spawning a script interpreter from a user context' because the scenario describes a classic phishing attack where a malicious macro or embedded script in an invoice document launches wscript.exe (a Windows Script Host interpreter) from the user's profile directory. This behavior is a strong indicator of script-based malware execution, as legitimate Office documents rarely spawn script interpreters directly from user-writable paths. The detection logic specifically targets the parent-child process relationship between an Office application (e.g., WINWORD.EXE, EXCEL.EXE) and wscript.exe, which is a common technique used by attackers to bypass application whitelisting and execute arbitrary code.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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