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Google Cloud Certified - Professional Security Operations Engineer (PSOE) Exam 認定 Security-Operations-Engineer 試験問題 (Q47-Q52):

質問 # 47
Your Google Security Operations (SecOps) case queue contains a case with IP address entities. You need to determine whether the entities are internal or external assets and ensure that internal IP address entities are marked accordingly upon ingestion into Google SecOps SOAR. What should you do?

A. Create a custom action to ping the IP address entity from your Remote Agent. If successful, the custom action designates the IP address entity as internal.
B. Indicate your organization's known internal CIDR ranges in the Environment Networks list in the settings.
C. Configure a feed to ingest enrichment data about the networks, and include these fields into your detection outcome.
D. Modify the connector logic to perform a secondary lookup against your CMDB and flag incoming entities as internal or external.

正解：B

質問 # 48
You use Google Security Operations (SecOps) curated detections and YARA-L rules to detect suspicious activity on Windows endpoints. Your source telemetry uses EDR and Windows Events logs. Your rules match on the principal.user.userid UDM field. You need to ingest an additional log source for this field to match all possible log entries from your EDR and Windows Event logs. What should you do?

A. Ingest logs from Windows Sysmon.
B. Ingest logs from Microsoft Entra ID.
C. Ingest logs from Windows PowerShell.
D. Ingest logs from Windows Procmon.

正解：B

解説：
Comprehensive and Detailed Explanation
The correct answer is Option A. This question is about entity context enrichment and aliasing.
Endpoint telemetry from EDR and Windows Event Logs (like 4624) identifies users by their Windows Security Identifier (SID) (e.g., S-1-5-21-12345...). However, detection rules are more effective when they match on a human-readable and consistent identifier, like an email address or username, which is stored in principal.user.userid.
To "connect the dots" between the SID found in endpoint events and the userid, Google SecOps must ingest an authoritative user context data source. In a modern Windows environment, this source is Microsoft Entra ID (formerly Azure AD) or on-premises Active Directory.
Ingesting Entra ID logs as a USER_CONTEXT feed populates the SecOps entity graph. This allows the platform to automatically alias the SID from an endpoint log to the corresponding userid (e.g., jsmith@company.com) at ingestion time. This ensures the principal.user.userid field is correctly populated, allowing the detection rules to match.
Options B, C, and D are all additional event sources (like EDR) and would provide more SIDs, but they do not provide the central directory data needed to perform the aliasing.
Exact Extract from Google Security Operations Documents:
UDM enrichment and aliasing overview: Google Security Operations (SecOps) supports aliasing and enrichment for assets and users. Aliasing enables enrichment. For example, using aliasing, you can find the job title and employment status associated with a user ID.
How aliasing works: User aliasing uses the USER_CONTEXT event type for aliasing. This contextual data is stored as entities in the Entity Graph. When new Unified Data Model (UDM) events are ingested, enrichment uses this aliasing data to add context to the UDM event. For example, an EDR log might contain a principal.windows_sid. The enrichment process queries the entity graph (populated by your Active Directory or Entra ID feed) and populates the principal.user.userid and other fields in the principal.user noun.
References:
Google Cloud Documentation: Google Security Operations > Documentation > Event processing > UDM enrichment and aliasing overview Google Cloud Documentation: Google Security Operations > Documentation > Ingestion > Collect Microsoft Entra ID logs

質問 # 49
You are an incident responder at your organization using Google Security Operations (SecOps) for monitoring and investigation. You discover that a critical production server, which handles financial transactions, shows signs of unauthorized file changes and network scanning from a suspicious IP address.
You suspect that persistence mechanisms may have been installed. You need to use Google SecOps to immediately contain the threat while ensuring that forensic data remains available for investigation. What should you do first?

A. Deploy emergency patches, and reboot the server to remove malicious persistence.
B. Use the EDR integration to quarantine the compromised asset.
C. Use VirusTotal to enrich the IP address and retrieve the domain. Add the domain to the proxy block list.
D. Use the firewall integration to submit the IP address to a network block list to inhibit internet access from that machine.

正解：B

解説：
Comprehensive and Detailed Explanation
The correct answer is Option C. The prompt specifies two critical, simultaneous requirements: immediate containment and preservation of forensic data.
* Immediate Containment: The server is actively scanning the network, so it must be taken offline to prevent lateral movement and further compromise.
* Forensic Preservation: The suspicion of persistence mechanisms means a full investigation is required. This investigation relies on volatile data (running processes, memory, active network connections) that must not be destroyed.
Option C is the only action that satisfies both requirements. Using a Google SecOps SOAR playbook to trigger the EDR integration's "quarantine" action instructs the EDR agent on the server to block all its network connections. This immediately contains the threat. However, the server itself remains running, which preserves all volatile forensic data for the investigation.
Option B (reboot) is incorrect because it is an eradication step that would destroy all volatile forensic evidence. Options A and D are incomplete containment or investigation steps that do not fully isolate the compromised host.
Exact Extract from Google Security Operations Documents:
Incident Response and Containment: When a critical asset is compromised, the first priority is containment.
Google SecOps SOAR playbooks integrate with Endpoint Detection and Response (EDR) tools to automate this step.
EDR Integration Actions: The most common containment action is "Quarantine Host" or "Isolate Asset." This action instructs the EDR agent on the endpoint to block all network communications, effectively isolating it from the rest of the network. This step immediately stops the threat from spreading or communicating with a C2 server. A key benefit of this approach, as opposed to a shutdown or reboot, is that the host remains powered on, which preserves volatile memory and process data for forensic investigation.
References:
Google Cloud Documentation: Google Security Operations > Documentation > SOAR > Playbooks > Playbook Actions Google Cloud Documentation: Google Security Operations > Documentation > SOAR > Marketplace integrations > (e.g., CrowdStrike, SentinelOne, Microsoft Defender)

質問 # 50
Your organization uses the curated detection rule set in Google Security Operations (SecOps) for high priority network indicators. You are finding a vast number of false positives coming from your on-premises proxy servers. You need to reduce the number of alerts. What should you do?

A. Configure a rule exclusion for the network.asset.ip field.
B. Configure a rule exclusion for the target.ip field.
C. Configure a rule exclusion for the principal.ip field.
D. Configure a rule exclusion for the target.domain field.

正解：C

解説：
Comprehensive and Detailed Explanation
The correct solution is Option B. This is a common false positive tuning scenario.
The "high priority network indicators" rule set triggers when it sees a connection to or from a known- malicious IP or domain. The problem states the false positives are coming from the on-premises proxy servers.
This implies that the proxy server itself is initiating traffic that matches these indicators. This is often benign, legitimate behavior, such as:
* Resolving a user-requested malicious domain via DNS to check its category.
* Performing an HTTP HEAD request to a malicious URL to scan it.
* Fetching its own threat intelligence or filter updates.
In all these cases, the source of the network connection is the proxy server. In the Unified Data Model (UDM), the source IP of an event is stored in the principal.ip field.
To eliminate these false positives, you must create a rule exclusion (or add a not condition to the rule) that tells the detection engine to ignore any events where the principal.ip is the IP address of your trusted proxy servers. This will not affect the rule's ability to catch a workstation behind the proxy (whose IP would be the principal.ip) connecting through the proxy to a malicious target.ip.
Exact Extract from Google Security Operations Documents:
Curated detection exclusions: Curated detections can be tuned by creating exclusions to reduce false positives from known-benign activity. You can create exclusions based on any UDM field.
Tuning Network Detections: A common source of false positives for network indicator rules is trusted network infrastructure, such as proxies or DNS servers. This equipment may generate traffic to malicious domains or IPs as part of its normal operation (e.g., DNS resolution, content filtering lookups). In this scenario, the traffic originates from the infrastructure device itself. To filter this noise, create an exclusion where the principal.ip field matches the IP address (or IP range) of the trusted proxy server. This prevents the rule from firing on the proxy's administrative traffic while preserving its ability to detect threats from end-user systems.
References:
Google Cloud Documentation: Google Security Operations > Documentation > Detections > Curated detections > Tune curated detections with exclusions Google Cloud Documentation: Google Security Operations > Documentation > Detections > Overview of the YARA-L 2.0 language

質問 # 51
You are developing a playbook to respond to phishing reports from users at your company. You configured a UDM query action to identify all users who have connected to a malicious domain. You need to extract the users from the UDM query and add them as entities in an alert so the playbook can reset the password for those users. You want to minimize the effort required by the SOC analyst. What should you do?

A. Create a case for each identified user with the user designated as the entity.
B. Use the Create Entity action from the Siemplify integration. Use the Expression Builder to create a placeholder with the usernames in the Entities Identifier parameter.
C. Implement an Instruction action from the Flow integration that instructs the analyst to add the entities in the Google SecOps user interface.
D. Configure a manual Create Entity action from the Siemplify integration that instructs the analyst to input the Entities Identifier parameter based on the results of the action.

正解：B

解説：
Comprehensive and Detailed 150 to 250 words of Explanation From Exact Extract Google Security Operations Engineer documents:
The key requirement is to *automate* the extraction of data to *minimize analyst effort*. This is a core function of Google Security Operations SOAR (formerly Siemplify). The **Siemplify integration** provides the foundational playbook actions for case management and entity manipulation.
The **`Create Entity`** action is designed to programmatically add new entities (like users, IPs, or domains) to the active case. To make this action automatic, the playbook developer must use the **Expression Builder**. The Expression Builder is the tool used to parse the JSON output from a previous action (the UDM query) and dynamically map the results (the list of usernames) into the parameters of a subsequent action.
By using the Expression Builder to configure the `Entities Identifier` parameter of the `Create Entity` action, the playbook automatically extracts all `principal.user.userid` fields from the UDM query results and adds them to the case. These new entities can then be automatically passed to the next playbook step, such as
"Reset Password."
Options A and C are incorrect because they are **manual** actions. They require an analyst to intervene, which does *not* minimize effort. Option D is incorrect as it creates multiple, unnecessary cases, flooding the queue instead of enriching the single, original phishing case.
*(Reference: Google Cloud documentation, "Google SecOps SOAR Playbooks overview"; "Using the Expression Builder"; "Marketplace and Integrations")*
***

質問 # 52
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Security-Operations-Engineer試験問題は正式に認定されています。私たちGoogleの目標は、効率的な学習スタイルで、Google Cloud Certified - Professional Security Operations Engineer (PSOE) Exam関連するSecurity-Operations-Engineer試験に合格できるようにすることです。 Security-Operations-Engineerトレーニング資料の品質と手頃な価格により、当社の競争力は常に世界のリーダーです。 Security-Operations-Engineer学習教材は、他のトレーニング教材よりも高い合格率を持っているため、完全な結果を得ることができると確信しています。 Security-Operations-Engineer試験問題を使用すると、JPNTest成功が保証されます。

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Created: 06/11/2025 04:28:36

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