ECCouncil 312-39 (Certified SOC Analyst) Practice Test 39

Question 380

After a disk image is acquired, an analyst needs to search it for a malware hash. How should the original evidence be protected?

  1. Replace the original image with a list of matching hashes only
  2. Use the original evidence drive as a sandbox execution disk
  3. Analyze verified copies, leaving original evidence read-only
  4. Allow every analyst to modify the original image to annotate findings

Explanation

Correct Answer

C:

Working copies permit repeatable searches and tool experiments without risking alteration of the preserved source artifact.

Incorrect Answers

A:

A hash-hit summary omits other artifacts and cannot support independent investigation of alternative hypotheses.

B:

Running malware can change files and compromise the examination environment, defeating preservation goals.

D:

Writable shared originals undermine integrity and make it hard to distinguish discovered data from analyst changes.

Question 381

An SOC has deployed Microsoft Sentinel, but a firewall feed is not appearing in the expected table. What is the most useful first validation?

  1. Broaden the scheduled analytic rule time window to look for the missing firewall records
  2. Increase Log Analytics retention from 30 to 90 days before checking the connector
  3. Check the relevant data connector, collection pathway, workspace, and ingestion status
  4. Increase the firewall alert severity threshold in Sentinel without testing data delivery

Explanation

Correct Answer

C:

A connected-looking data source may still lack agent forwarding, correct workspace routing, or successful ingestion; verify the entire chain before changing rules.

Incorrect Answers

A:

A larger query window helps only when the events were ingested. Rule scope is downstream from the collector, connector, and workspace routing that the analyst must diagnose first.

B:

Retention governs how long collected events remain searchable; extending it does not cause an agent or integration to begin forwarding missing current firewall records.

D:

Changing alert severity or filtering adjusts incident presentation, not whether source events reached the intended Log Analytics table. The ingestion pathway still requires validation.

Question 382

A Sentinel data connector is healthy, but repeated suspicious sign-ins do not produce an incident. Which configuration should the analyst inspect?

  1. Extend the Log Analytics data retention period for the sign-in event table
  2. Increase the refresh frequency of a Sentinel workbook tracking the sign-in alerts
  3. Change the data connector to send sign-in records to an unrelated workspace
  4. Check the rule query, entity mapping, thresholds and incident settings

Explanation

Correct Answer

D:

Healthy ingestion establishes only that records exist; an analytics rule must match the events and generate alerts or incidents as configured.

Incorrect Answers

A:

Keeping records for longer supports historical hunting, but a detection that fails to match recent events will not start firing solely because retention increased.

B:

A workbook displays and explores data but does not itself create incidents. Scheduled analytics query logic and incident-generation settings must be investigated directly.

C:

Sending records to a different destination may make matters worse by separating the analytics rule from its source table; it does not diagnose a healthy connector and broken detection.

Question 383

A cloud administrator unexpectedly removes a production network security group rule. Which Azure telemetry most directly describes that management-plane change?

  1. Microsoft Entra sign-in events that describe user authentication outcomes
  2. The Azure Activity Log for subscription and resource control-plane operations
  3. Network flow telemetry generated by the network security group traffic rules
  4. The current network security group configuration read from Azure Resource Graph

Explanation

Correct Answer

B:

The Activity Log records management operations on Azure resources, which helps identify who modified the security group rule and when.

Incorrect Answers

A:

Entra sign-in logs support user authentication investigations, but an Azure network security group change is a subscription or resource management action recorded in the Activity Log.

C:

Flow telemetry describes traffic allowed or denied by networking controls. It generally cannot attribute the control-plane API request that edited a security group rule.

D:

A configuration snapshot can show the resulting rules, but without the relevant change audit it does not establish the original actor and management-operation time.

Question 384

A Sentinel alert identifies repeated denied cloud sign-ins followed by a successful sign-in from a new country. Which source should be correlated first?

  1. Azure Activity Log entries for resource deployment and control-plane updates
  2. Defender for Cloud security recommendations regarding account-related posture
  3. Microsoft Entra directory audit logs for application and role configuration changes
  4. Microsoft Entra sign-in records and associated risk context

Explanation

Correct Answer

D:

Identity sign-in records can establish the authentication sequence and help determine whether the successful event warrants account containment.

Incorrect Answers

A:

Azure Activity Log tracks resource operations at management scopes, not the per-attempt authentication results required to reconstruct the user sign-in sequence.

B:

Posture findings can help with risk context but do not replace the underlying Entra sign-in record details needed to attribute denied and successful authentication.

C:

Directory audit logs are important for identity configuration events; sign-in logs are the direct evidence for successive authentication attempts, outcomes, addresses, and applications.

Question 385

A Sentinel investigation reveals that a newly created service principal has tenant-wide permissions. What is the best next step?

  1. Audit the principal creation, grants, consents and subsequent use
  2. Check only the service principal display name and application registration description
  3. Delete the service principal immediately without recording its permissions or activity
  4. Review only interactive human sign-ins while excluding application-authentication records

Explanation

Correct Answer

A:

Privilege assignment and consent evidence can distinguish an authorized deployment from attacker-created persistence across the cloud tenant.

Incorrect Answers

B:

App names and descriptions are attacker-editable context, not authorization evidence. Creation audit, permission grants, tenant roles, and token usage must be examined together.

C:

Premature deletion can disrupt workloads and destroy evidence of persistence. Investigators should preserve audit context and coordinate proportionate containment under authorization.

D:

Service principals often authenticate noninteractively, so restricting the investigation to human sign-ins can overlook the very credentials and activity under scrutiny.

Question 386

A SOC wants a single investigation to combine cloud security recommendations with suspicious endpoint and sign-in events. Which design is most suitable?

  1. Rely exclusively on Defender for Cloud posture recommendations and stop collecting endpoint events
  2. Route each product to separate analyst-only workspaces with no shared correlation fields
  3. Correlate Defender for Cloud signals in Sentinel
  4. Assume Defender for Cloud recommendations and Sentinel incidents are interchangeable data types

Explanation

Correct Answer

C:

Posture and protection findings can be investigated alongside sign-in, endpoint, and resource records when their connectors and entity mapping are configured.

Incorrect Answers

A:

Configuration findings do not reconstruct malicious process execution, credential theft, or lateral movement on virtual machines; endpoint evidence remains necessary for incident scope.

B:

Siloed data reduces the ability to connect resource exposure, account behavior, and endpoint execution. The integration design should maintain scoped access and common entities.

D:

Posture recommendations and incident detections serve different purposes and require context before an analyst treats a risk as an active compromise.

Question 387

An AWS IAM access key is suspected of creating a new privileged role. What evidence is most useful to identify the API caller and the sequence of actions?

  1. CloudTrail management events identifying the API actor and action
  2. VPC Flow Logs for the subnet where the alleged IAM API caller ran
  3. AWS Config resource history without confirming the API caller in CloudTrail
  4. AWS IAM Access Analyzer findings without the underlying CloudTrail management events

Explanation

Correct Answer

A:

CloudTrail management events provide API audit context for IAM role changes and can connect access keys or assumed roles to specific actions.

Incorrect Answers

B:

Flow logs show packet and connection metadata, not which AWS API operation created a role or the identity attached to that management request.

C:

Resource configuration history may show changes to supported resources, but CloudTrail management events provide the direct API operation, caller, and request context.

D:

Access Analyzer can identify external or unintended access paths, but its findings are not a comprehensive action-by-action API audit for attributing IAM role creation.

Question 388

AWS GuardDuty reports that an EC2 instance is communicating with infrastructure associated with a known command-and-control network. What should the analyst do?

  1. Label the GuardDuty finding as confirmed data exfiltration based on destination reputation alone
  2. Apply a VPC-wide network ACL deny rule before validating affected instance scope
  3. Validate the finding and respond to the affected instance
  4. Automatically close the GuardDuty finding after blocking one destination address

Explanation

Correct Answer

C:

GuardDuty findings are detection signals that need investigation; instance identity, flow context, and approved isolation procedures guide a defensible response.

Incorrect Answers

A:

A suspicious remote endpoint is evidence of concern, not direct proof of what was transmitted. Bytes, processes, object access, and packet context need corroboration.

B:

A broad network action may interrupt healthy workloads and still miss other attack paths. Scoping the finding and obtaining response authorization are safer first steps.

D:

A single blocked IP may limit one communication path, but it cannot establish the infection mechanism, other destinations, or whether compromised credentials remain active.

Question 389

An AWS organization needs a central place to review security findings from multiple AWS security services. Which capability is most relevant?

  1. CloudTrail alone as a replacement for all security findings and alert workflows
  2. Amazon Macie classification findings as the sole cross-service detection queue
  3. AWS Security Hub for consolidated integrated security findings
  4. AWS Config compliance snapshots as a complete replacement for threat detections

Explanation

Correct Answer

C:

Security Hub provides a consolidated security-operations view and workflows for findings from supported AWS and third-party sources.

Incorrect Answers

A:

CloudTrail supplies API activity evidence but does not by itself implement a comprehensive findings aggregation and prioritization service.

B:

Macie specializes in sensitive-data discovery and certain S3-related findings; it does not replace general aggregation of GuardDuty, Inspector, and other supported findings.

D:

Configuration assessments surface drift and posture issues but are not a substitute for the threat findings and operational workflows that a security hub can consolidate.

Question 390

A security analyst must detect and prioritize publicly accessible storage and noncompliant AWS configuration controls. Which complementary AWS capability is most directly aligned?

  1. Amazon GuardDuty threat findings without configuration posture control assessments
  2. An AWS Config recorder enabled with no suitable rule evaluations or findings workflow
  3. CloudTrail Lake queries limited to cloud API history instead of posture-control evaluations
  4. AWS Security Hub CSPM security standards and posture-control findings

Explanation

Correct Answer

D:

The cloud security posture management capability evaluates configured security controls and exposes misconfiguration or compliance-oriented findings.

Incorrect Answers

A:

GuardDuty detects signs of malicious activity and compromised resources. Misconfiguration and standards-based posture checks require a complementary control-evaluation mechanism.

B:

Recording configuration state creates useful evidence, but it does not automatically deliver prioritized standards-oriented posture findings unless the evaluations and workflow are configured.

C:

CloudTrail Lake helps analyze recorded AWS activity, but API history alone does not compute every configuration-control compliance finding across in-scope resources.

Certified SOC Analyst (312-39) Practice Tests