20+ practice questions focused on Security Operations — one of the most tested topics on the CompTIA CySA+ CS0-004 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Security Operations PracticeDuring a memory analysis of a compromised host, an analyst finds that 'svchost.exe' is running from 'C:\Users\Public\svchost.exe' instead of 'C:\Windows\System32\svchost.exe'. The process has injected code into a legitimate 'explorer.exe' process. What technique is being observed?
Explanation: The observation shows a legitimate process (explorer.exe) carrying injected malicious code from a non-standard svchost.exe path. DLL injection is the technique where an attacker forces a legitimate process to load a malicious DLL, often by writing the DLL path into the target process's memory and invoking LoadLibrary. Here, the injected code into explorer.exe is the hallmark of DLL injection, not process hollowing or side-loading.
An analyst is reviewing logs from multiple sources and sees that a user logged into a workstation at 8:00 AM, then the same user logged into a server in a different building at 8:01 AM. The authentication logs show the same source IP for both logins. What should the analyst suspect?
Explanation: It's physically impossible to travel between buildings in one minute. The same source IP suggests a possible pass-the-hash or credential relay attack from the workstation to the server.
During a network traffic analysis, a security analyst observes repeated connections from an internal host to an external IP address on TCP port 53. The traffic volume is low but consistent. What type of anomaly is most likely indicated?
Explanation: DNS tunneling often uses port 53 to exfiltrate data by encoding it in DNS queries. The consistent low-volume traffic to a single external IP suggests covert communication.
A security analyst is tuning a SIEM rule that generates alerts for any failed login attempt. The rule produces too many alerts, overwhelming the team. Which TWO actions would most effectively reduce false positives while maintaining detection of actual brute-force attacks?
Explanation: Option E is correct because replacing a per-event alert with a threshold-based correlation (5 failures from the same source IP within a 10-minute window) is the standard way to suppress isolated, benign failed logins while still firing on the repeated-failure pattern that characterizes brute-force attacks. Option A is correct because known service accounts (e.g., scheduled tasks, backup jobs, monitoring agents) frequently generate failed logins due to stale cached credentials or misconfigured services, so excluding them removes a large, predictable source of false positives without hiding attacker activity against interactive user accounts. Option B is wrong because disabling the rule eliminates detection of real brute-force attacks entirely, which violates the requirement to maintain detection. Option C is wrong because raising severity to critical for every failed login does nothing to reduce alert volume and actually increases the operational burden. Option D is wrong because a correlation rule on success-after-multiple-failures detects successful compromise rather than the brute-force attempt itself, so it would not preserve detection of ongoing brute-force attacks.
A threat hunter notices that a legitimate Windows binary 'rundll32.exe' is executing with network connections to an external IP address. The parent process is 'winword.exe'. Which LOLBin technique is most likely being used?
Explanation: Rundll32.exe is a known LOLBin that can be used to execute DLLs. When spawned from winword.exe, it often indicates a macro-based attack loading a remote payload.
+15 more Security Operations questions available
Practice all Security Operations questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Security Operations. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Security Operations questions on the CS0-004 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Security Operations is tested as part of the CompTIA CySA+ CS0-004 blueprint. Practicing with targeted Security Operations questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Security Operations is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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