ECCouncil 212-89 (EC-Council Certified Incident Handler) Practice Test 46

Question 450

A case advances from immediate protection to root-cause correction after: After a phishing incident, the mailbox is reopened without checking whether outbound messages were sent to internal contacts. Which verified recovery step is appropriate after initial containment?

  1. Search sent-item logs, message trace and recipient reports for compromise-period mail
  2. Notify and remediate recipients of identified attacker-sent messages
  3. Assess exposed recipients and data categories with privacy and legal owners
  4. Hold risky outbound activity while checking related campaigns
  5. Monitor unusual outbound patterns after reinstating compromised mailboxes

Explanation

Correct Answer

B:

Recovery should include downstream mailboxes, not just the original account; the recovery decision is tied to whether the mailbox propagated the attack, not merely to reduced alert volume.

Incorrect Answers

A:

An attacker may have used a trusted mailbox to reach secondary victims; verification is not the corrective step in the decision about whether the mailbox propagated the attack.

C:

Impact analysis drives proportionate notification and customer response; the relevant condition for that step is what scope of information exposure remains, which is not shown for whether the mailbox propagated the attack.

D:

Temporary restrictions avoid further trusted-origin spread; for whether the mailbox propagated the attack, temporary protection does not complete correction; trusted restoration remains necessary.

E:

Post-recovery observation catches residual misuse; the requirement concerns whether the mailbox propagated the attack, so future hardening is not current-state recovery.

Question 451

Following initial stabilization, the team must prove recovery for this case: A company has SPF but no DKIM signing on a third-party campaign platform, causing legitimate mail to fail aligned checks. Which correction must be verified before the affected service or process is restored?

  1. Pause enforcement escalation until the legitimate flow is correctly configured
  2. Maintain a sender inventory before tightening DMARC policy
  3. Move approved automation to signed and managed document sources
  4. Configure aligned DKIM signing and validate third-party sending paths

Explanation

Correct Answer

D:

Authenticated alignment improves deliverability and spoof resistance; the resulting state needs verification against the original concern: why authentication policy rejects approved senders.

Incorrect Answers

A:

A rushed reject policy may disrupt authorized business messages; the case needs trusted restoration addressing why authentication policy rejects approved senders; temporary protection does not complete correction.

B:

Change control prevents accidental rejection of sanctioned services; when judging why authentication policy rejects approved senders, future hardening is not current-state recovery; this is instead recurrence prevention.

C:

Controlled trust avoids dependence on untrusted internet attachments; the other incident centers on whether attachment policy is too broad, not this trusted restoration question about why authentication policy rejects approved senders.

Question 452

While full remediation remains pending, the commander receives this incident report: A restored executive mailbox continues to show attacker-created calendar invitations containing fraudulent video meeting URLs. The current decision requires two different outcomes: evidence-based verification AND initial protection, without treating cleanup as complete. Which TWO measures provide those outcomes? (Choose TWO.)

  1. Cancel suspect events through approved workflow and warn invitees
  2. Inspect calendar event creation, organizer and invite URLs during compromise
  3. Notify and remediate recipients of identified attacker-sent messages
  4. Monitor abnormal calendar invitations after account compromise
  5. Clean untrusted calendar artifacts and review affected attendee accounts

Explanation

Correct Answers

A:

Removing scheduled lures limits delayed victim interactions; within the combined response for whether non-email mailbox artifacts remain malicious, this supplies initial containment or preservation: the protective decision should be recorded and its effect tested against whether non-email mailbox artifacts remain malicious.

B:

Account misuse can extend to calendar items and meeting invitations; within the combined response for whether non-email mailbox artifacts remain malicious, this supplies evidence validation: that evidence directly tests the concern about whether non-email mailbox artifacts remain malicious, rather than relying on a single unverified indicator.

Incorrect Answers

C:

Recovery should include downstream mailboxes, not just the original account; this serves whether the mailbox propagated the attack, whereas the requested result is initial containment or preservation involving whether non-email mailbox artifacts remain malicious.

D:

Expanded audit coverage catches follow-on phishing channels; the goal is initial containment or preservation for whether non-email mailbox artifacts remain malicious. Prevention cannot replace immediate action.

E:

Recovery includes collaboration objects created by the attacker; corrective follow-through follows initial protection in the decision about whether non-email mailbox artifacts remain malicious.

Question 453

The response team seeks the relevant control point for this problem: A former contractor's compromised shared-mailbox permission remains active after the primary mailbox owner's password reset. Investigators need both a defensible factual finding and a limited immediate safeguard. Which TWO actions jointly satisfy those requirements? (Choose TWO.)

  1. Revoke the contractor's unauthorized access and active sessions
  2. Review shared-mailbox member grants and contractor account sign-ins
  3. Audit shared-mailbox activity and restore only approved membership
  4. Alert on unexpected mailbox delegation and access-grant changes
  5. Review contractor offboarding and shared-mailbox membership regularly
  6. Rotate credentials and revalidate approved client access requirements

Explanation

Correct Answers

A:

Access control changes must target the actual delegated identity; within the combined response for whether shared-mailbox membership leaves an access route, this supplies initial containment or preservation: this is a first-response safeguard for whether shared-mailbox membership leaves an access route, not a substitute for full root-cause analysis.

B:

Permissions delegated to a separate identity are not removed by resetting another user's password; within the combined response for whether shared-mailbox membership leaves an access route, this supplies evidence validation: it makes the determination of whether shared-mailbox membership leaves an access route defensible and reviewable by the incident owner.

Incorrect Answers

C:

Cleanup closes lingering permissions while retaining required collaboration; the case needs initial containment or preservation addressing whether shared-mailbox membership leaves an access route; corrective follow-through follows initial protection.

D:

Privilege-change monitoring catches stealthy persistence; that method could help with which delegation entry permits continued access; the initial containment or preservation decision here involves whether shared-mailbox membership leaves an access route.

E:

Lifecycle governance reduces dormant access abuse; for whether shared-mailbox membership leaves an access route, prevention cannot replace immediate action; initial containment or preservation remains necessary.

F:

Restoration should eliminate unmonitored authentication paths; it is meant to address whether legacy authentication remains usable, not initial containment or preservation for whether shared-mailbox membership leaves an access route.

Question 454

The incident owner requests a defensible factual determination after hearing: A phishing email links to a lookalike login site that asks for a one-time code immediately after the password. What fact-checking activity tests the observed failure most directly?

  1. Correlate the phishing URL, sign-in sequence and unexpected session/token activity
  2. Revoke active identity sessions and block the phishing destination
  3. Decode the QR target safely and inspect URL and identity sign-in telemetry
  4. Use phishing-resistant authentication and conditional access protections

Explanation

Correct Answer

A:

Captured credentials and session artifacts may permit access beyond password knowledge; this evidence is scoped to whether an adversary-in-the-middle login capture occurred, not a generic system-health reading.

Incorrect Answers

B:

Token revocation helps terminate access that password reset alone might not stop; the case needs evidence validation addressing whether an adversary-in-the-middle login capture occurred; immediate protection does not substantiate findings.

C:

The visible invitation may not reveal where the code redirects a mobile browser; the relevant condition for that step is whether the QR destination is a phishing site, which is not shown for whether an adversary-in-the-middle login capture occurred.

D:

Strong origin-bound factors reduce session-theft opportunities; for whether an adversary-in-the-middle login capture occurred, prevention is not incident verification; evidence validation remains necessary.

Question 455

Responders are preparing to reinstate operations after this situation: An attacker places a malicious QR code in an emailed meeting invitation and employees scan it on personal phones. What should be corrected before technical closure of the incident?

  1. Decode the QR target safely and inspect URL and identity sign-in telemetry
  2. Review affected account logins and revoke compromised sessions
  3. Block the destination and notify recipients through a trusted channel
  4. Remove matching messages from recipient mailboxes after evidence capture
  5. Teach QR verification and inspect embedded destinations in mail security analysis

Explanation

Correct Answer

B:

Mobile-origin authentication may still expose corporate identities; the owner can validate the correction against the evidence bearing on whether the QR destination is a phishing site.

Incorrect Answers

A:

The visible invitation may not reveal where the code redirects a mobile browser; for whether the QR destination is a phishing site, verification is not the corrective step; trusted restoration remains necessary.

C:

Recipients need warning before scanning the embedded link; the goal is trusted restoration for whether the QR destination is a phishing site. Temporary protection does not complete correction.

D:

Fleet-wide remediation prevents another recipient from following the lure; it is meant to address whether a message impersonates the support sender, not trusted restoration for whether the QR destination is a phishing site.

E:

QR links deserve the same scrutiny as visible hyperlinks; the case needs trusted restoration addressing whether the QR destination is a phishing site; future hardening is not current-state recovery.

Question 456

Before destructive cleanup is authorized, the team faces this situation: An attacker sends internal-looking phishing messages from a genuinely compromised employee mailbox. The current decision requires two different outcomes: evidence-based verification AND initial protection, without treating cleanup as complete. Which TWO measures provide those outcomes? (Choose TWO.)

  1. Remove unauthorized rules and rotate affected identity credentials
  2. Correlate mailbox send events with unusual sign-ins, device and geography
  3. Detect unusual internal sending volumes and risky session behavior
  4. Suspend suspicious sessions and contain the compromised mailbox's outbound sending
  5. Investigate delegation, rules and sent-item anomalies before restoring access

Explanation

Correct Answers

B:

Authenticated internal mail can still originate from a hijacked session; within the combined response for whether sender authentication masks an account takeover, this supplies evidence validation: that evidence directly tests the concern about whether sender authentication masks an account takeover, rather than relying on a single unverified indicator.

D:

This interrupts further trusted-origin phishing; within the combined response for whether sender authentication masks an account takeover, this supplies initial containment or preservation: the protective decision should be recorded and its effect tested against whether sender authentication masks an account takeover.

Incorrect Answers

A:

Account cleanup closes the exfiltration path and entry route; that method could help with which mailbox setting explains data leakage; the initial containment or preservation decision here involves whether sender authentication masks an account takeover.

C:

Account-centric analytics cover threats that pass domain authentication; prevention cannot replace immediate action in the decision about whether sender authentication masks an account takeover.

E:

Compromised accounts may conceal persistent forwarding or delegates; when judging whether sender authentication masks an account takeover, corrective follow-through follows initial protection; this is instead post-containment assessment.

Question 457

The incident is resolved, but its root weakness still requires policy attention: A malicious email includes a macro-enabled document archived in a password-protected ZIP file. What durable process or monitoring change would make a repeat less likely?

  1. Enforce DMARC policies on organizational domains with validated senders
  2. Restrict risky attachment types and use endpoint application controls
  3. Review attachment archive properties, message body password and sandbox outcomes
  4. Analyze the sample safely and investigate any endpoint executions

Explanation

Correct Answer

B:

Defense must cover payloads hidden from upstream scanning; it makes the lesson about whether scanning controls can inspect the payload part of normal operations.

Incorrect Answers

A:

Alignment controls reduce direct domain spoofing; this serves whether envelope and header identities are aligned, whereas the requested result is recurrence prevention involving whether scanning controls can inspect the payload.

C:

Encrypted archives can prevent gateway content inspection; when judging whether scanning controls can inspect the payload, an investigation is not recurrence prevention; this is instead evidence validation.

D:

A protected archive requires controlled extraction for analysis; for whether scanning controls can inspect the payload, case recovery is not future-risk control; recurrence prevention remains necessary.

Question 458

After technical restoration, responders document the weakness exposed by: A finance clerk receives an email from a familiar supplier requesting a bank account change without the usual contract reference. Which long-term control would reduce exposure to this specific pattern?

  1. Correct the payment instructions and investigate any payment already sent
  2. Require dual approval and independent confirmation for vendor bank changes
  3. Implement domain-similarity monitoring and verified supplier contacts
  4. Compare message headers, historical conversation context and verified supplier contacts

Explanation

Correct Answer

B:

Process controls block payment redirection even if email is compromised; the assurance measure is designed around whether a payment diversion request is authentic, rather than hiding the reported activity.

Incorrect Answers

A:

Financial recovery requires coordination with treasury and banking partners; for whether a payment diversion request is authentic, case recovery is not future-risk control; recurrence prevention remains necessary.

C:

Detection plus callback addresses visual domain impersonation; this serves whether domain homographs cause sender confusion, whereas the requested result is recurrence prevention involving whether a payment diversion request is authentic.

D:

A plausible sender name cannot establish authorization for revised payment instructions; an investigation is not recurrence prevention in the decision about whether a payment diversion request is authentic.

Question 459

Forensic review begins with this reported event: A helpdesk receives a user-reported phish but mail logs show the same URL in hundreds of already delivered messages. Which evidence-based task answers the primary uncertainty?

  1. Confirm removal results and assess previously interacting recipients
  2. Compare URL reputation at delivery time with subsequent redirect and click logs
  3. Search current mailbox inventory using normalized URLs and delivery times
  4. Execute an authorized tenant-wide quarantine or purge and block the link
  5. Cluster sender infrastructure, URL patterns, attachment hashes and sending times
  6. Automate phishing-report enrichment with campaign correlation

Explanation

Correct Answer

C:

A single report can represent a much broader delivery incident; that evidence directly tests the concern about whether a campaign remains active across mailboxes, rather than relying on a single unverified indicator.

Incorrect Answers

A:

Completion requires both mailbox and identity review; for whether a campaign remains active across mailboxes, recovery is not factual verification; evidence validation remains necessary.

B:

A benign initial landing page may later redirect to a malicious payload; that method could help with whether delayed URL weaponization bypassed initial inspection; the evidence validation decision here involves whether a campaign remains active across mailboxes.

D:

Removing all identified copies limits future clicks; immediate protection does not substantiate findings in the decision about whether a campaign remains active across mailboxes.

E:

Matching by a single Message-ID can miss related messages; this serves how to identify all related campaign copies, whereas the requested result is evidence validation involving whether a campaign remains active across mailboxes.

F:

Early pattern recognition shortens organization-wide response; when judging whether a campaign remains active across mailboxes, prevention is not incident verification; this is instead recurrence prevention.

Question 460

A long-term control assessment uses this recent event: DMARC reports are collected by a marketing vendor but never reviewed after a brand-spoofing wave. Which change provides measurable prevention rather than an emergency workaround?

  1. Analyze aggregate authentication outcomes and unauthorized sending sources
  2. Correct SPF/DKIM alignment and address legitimate sender inventory gaps
  3. Make raw-message collection automatic in user-reporting workflows
  4. Assign ownership for DMARC reporting and a phased enforcement plan

Explanation

Correct Answer

D:

Continuous analysis turns unused reports into actionable defense; it closes a repeatable gap revealed by whether domain authentication telemetry is operationally used without removing useful monitoring.

Incorrect Answers

A:

Reports can expose failed alignment and legitimate senders needing configuration; the goal is recurrence prevention for whether domain authentication telemetry is operationally used. An investigation is not recurrence prevention.

B:

Policy enforcement should not accidentally reject authorized mail flows; case recovery is not future-risk control in the decision about whether domain authentication telemetry is operationally used.

C:

Evidence automation improves investigation consistency; the other incident centers on which artifact makes campaign correlation reproducible, not this recurrence prevention question about whether domain authentication telemetry is operationally used.

EC-Council Certified Incident Handler (212-89) Practice Tests