ECCouncil 312-39 (Certified SOC Analyst) Practice Test 27

Question 260

An investigation yields a strong new behavioral detector for a rare admin-tool abuse technique. What should be handed to operations?

  1. A blanket rule to block every administrative remote session
  2. A guarantee that the detector catches every future variation of the technique
  3. A tested detection with prerequisites, owner and response guidance
  4. Only the original analyst's private search history

Explanation

Correct Answer

C:

Hunting produces durable value when discoveries become maintainable detections with clear triage actions and known limitations.

Incorrect Answers

A:

Remote access is often legitimate and a universal block ignores the discriminating behavior the hunt uncovered.

B:

Adversaries adapt, telemetry changes, and no single analytic can promise complete future coverage.

D:

Private searches are hard to operate reliably and lack the documentation required for ongoing SOC use.

Question 261

A company discovered during an incident that nobody knew who could authorize isolation of a production database. Which preparation activity most directly prevents recurrence?

  1. Focus exclusively on collecting more vulnerability-scan results
  2. Wait until the next incident to negotiate shutdown ownership
  3. Replace all database access controls with default administrator permissions
  4. Define incident authority, severity gates and emergency approvals

Explanation

Correct Answer

D:

Predetermined responsibility makes high-impact actions faster and safer when the incident team faces time pressure.

Incorrect Answers

A:

Exposure data matter, but they cannot substitute for emergency roles and authority to disrupt a critical service.

B:

Real-time negotiation during a crisis creates delays and conflicting directives for responders.

C:

Broad privilege would increase risk and does not establish approval rights for a security containment decision.

Question 262

A hospital response team plans for ransomware affecting clinical workstations. Which two measures best improve readiness before an attack? Choose TWO.

  1. Assume the existence of backup jobs guarantees successful restoration
  2. Test restoration from protected backups of critical applications and data
  3. Practice downtime and isolation procedures with clinical service owners
  4. Disconnect every hospital workstation permanently from essential systems
  5. Place recovery credentials in an unencrypted shared folder accessible to all staff

Explanation

Correct Answers

B:

Recovery assurance requires proven ability to restore operational systems from copies that attackers cannot readily alter.

C:

Exercises expose patient-safety dependencies and define the conditions under which endpoint containment is authorized.

Incorrect Answers

A:

Scheduled jobs can produce unusable or compromised copies, so recovery requires actual testing.

D:

Universal permanent disconnection prevents necessary care workflows and is not a practical preparedness method.

E:

Exposed credentials invite further compromise and undermine the security of backup and restoration functions.

Question 263

A SIEM flags one rejected port scan, while a separate case shows confirmed unauthorized access to payment records. Which classification principle applies?

  1. Close both cases because neither included a malware hash
  2. Declare both identical confirmed data breaches solely because a sensor generated alerts
  3. Classify using verified impact and evidence, not alert presence alone
  4. Treat the confirmed data access as benign if the login used valid credentials

Explanation

Correct Answer

C:

Incident declaration should be based on assessed consequences and malicious activity rather than assuming every signal has equal status.

Incorrect Answers

A:

Many attacks rely on valid accounts or web requests and can be incidents without a known malicious executable.

B:

A rejected probe lacks evidence of data access and should not automatically be equated with confirmed payment-record exposure.

D:

Authentication success does not establish authorization or eliminate the possibility of insider or stolen-credential misuse.

Question 264

EDR has isolated an infected workstation, but file-server telemetry shows encryption continuing through a compromised network share from other sessions. Which containment gap should responders address first?

  1. Treat the host isolation as complete and start user acceptance testing of the share
  2. Rotate the SIEM ingestion credential without changing share authorization
  3. Reimage the isolated workstation before assessing active file-share writers
  4. Revoke malicious write paths to the share with service-owner approval

Explanation

Correct Answer

D:

Coordinated access containment targets the remaining encryption path instead of relying on isolation of only the first host; business owners should approve necessary exceptions.

Incorrect Answers

A:

A single endpoint can be contained while other authenticated sessions continue writing to shared storage. Reopening access ignores the observed encryption activity.

B:

Collector authentication does not constrain the identities writing encrypted data to the affected file server and will not stop the active file modifications.

C:

Rebuilding one device may aid eradication later, but does not interrupt other sessions still modifying the share during the ongoing incident.

Question 265

A confirmed infected workstation is still communicating with a command server and is not performing safety-critical operations. Which action most directly limits further spread?

  1. Increase the ticket priority without any authorized technical control
  2. Block the single observed command-domain name in corporate DNS but leave the host network-connected
  3. Permanently delete all security agent data on the workstation
  4. Isolate the endpoint from normal network connectivity through approved EDR or network controls

Explanation

Correct Answer

D:

Containment interrupts lateral communication and command channels while preserving the opportunity for controlled forensic collection.

Incorrect Answers

A:

Administrative urgency helps coordination but does not by itself interrupt ongoing network communication.

B:

DNS denial may interrupt one name-based path, but malware could use cached addresses, other resolvers, or new destinations; endpoint isolation offers stronger containment.

C:

Agent evidence supports assessment; deletion does not necessarily stop the malicious process or its connectivity.

Question 266

A running server appears infected, but responders need its volatile memory before power-off. Which two actions fit a controlled response? Choose TWO.

  1. Let any employee run an unknown memory capture executable with administrator rights
  2. Perform an immediate hard power-off before considering volatile evidence
  3. Use approved network isolation that limits propagation while considering evidence preservation
  4. Coordinate a time-sensitive memory acquisition with an authorized responder
  5. Allow unrestricted outbound traffic indefinitely solely to preserve network packets

Explanation

Correct Answers

C:

Containment can constrain attacker communications without immediately destroying volatile state, depending on available controls.

D:

Memory can contain active processes, sessions, and decrypted material that may be lost when the system powers off.

Incorrect Answers

A:

Unapproved acquisition utilities can alter evidence and create new security exposure.

B:

Power loss can remove RAM artifacts and complicate reconstruction of active malware or sessions.

E:

Ongoing attacker communication can cause further harm; evidence collection must be balanced with containment urgency.

Question 267

Three endpoints show the same malware behavior but one domain controller has only a weak reputational indicator. What approach is most defensible?

  1. Isolate confirmed hosts and separately validate the DC alert
  2. Shut down every domain controller because it is more important than a workstation
  3. Delete all domain controller logs to reduce triage confusion
  4. Leave the three infected endpoints online until the controller is proven compromised

Explanation

Correct Answer

A:

Response scope should follow evidence and business impact; high-value systems need urgent review but not automatic shutdown on weak signals.

Incorrect Answers

B:

Importance increases potential consequence, but an unsupported shutdown may create enterprise-wide authentication outages.

C:

Discarding logs harms evidence preservation and cannot resolve ambiguity in the reputational indicator.

D:

Confirmed infected systems remain active risks and should not be ignored while another alert is investigated.

Question 268

During a cloud incident, a responder receives a chat message from the incident commander requesting immediate deletion of production evidence. The commander’s messaging account may be compromised. What is the safest next step?

  1. Accept the instruction if the chat avatar and display name match the commander
  2. Confirm the request through a trusted channel before acting
  3. Wait for the same account to repeat the request in the chat channel
  4. Copy the message into the incident ticket and delete the evidence immediately

Explanation

Correct Answer

B:

Out-of-band identity confirmation is necessary when the primary channel may be controlled by an attacker, especially for irreversible, high-impact actions.

Incorrect Answers

A:

Account takeover can preserve familiar account attributes. Deleting evidence without trusted validation could destroy the investigation record.

C:

Repeated instructions through a suspected compromised channel provide no independent confirmation of authority or legitimacy.

D:

An audit note documents the message but does not establish that its sender is trustworthy or that the requested destruction is authorized.

Question 269

During response, analysts must collect logs from an employee laptop containing private documents unrelated to the case. What handling practice is appropriate?

  1. Avoid keeping any acquisition notes because the investigation is internal
  2. Edit the original records until they support the suspected hypothesis
  3. Copy every private file to a publicly accessible collaboration folder
  4. Preserve only authorized, relevant material with recorded access

Explanation

Correct Answer

D:

Targeted acquisition and privacy-aware controls support investigation without unnecessary exposure of unrelated personal information.

Incorrect Answers

A:

Internal investigations still need provenance and handling records for reliable conclusions and accountability.

B:

Changing original evidence undermines integrity and makes later independent validation impossible.

C:

Broad disclosure increases privacy and confidentiality risk and is unrelated to defensible evidence handling.

Question 270

A confirmed incident affects customer personal data, and the notification deadline depends on jurisdiction and breach criteria. Who should determine external notification obligations?

  1. Any SOC analyst based solely on the first raw alert
  2. Legal and privacy teams assess jurisdictional notification duties
  3. The third-party SIEM vendor according to a universal deadline
  4. Only the affected end user without considering the incident organization

Explanation

Correct Answer

B:

Reporting duties vary by law, contract, data type, and event assessment, so notifications need authorized legal review.

Incorrect Answers

A:

Early telemetry may not establish personal-data exposure or statutory conditions and is a poor basis for public statements.

C:

A tool provider does not define every organization's legal obligations, which depend on applicable law and contracts.

D:

External obligations are organizational and may require designated breach-response governance and counsel.

Certified SOC Analyst (312-39) Practice Tests