ECCouncil 212-89 (EC-Council Certified Incident Handler) Practice Test 63

Question 620

An improvement plan must address recurrence after this case: An employee uses a corporate proxy to upload classified engineering files to an unauthorized personal cloud account. What should the owner add to the normal control review to reduce recurrence?

  1. Join proxy upload metadata with data classification and employee identity
  2. Block the unapproved upload channel and preserve evidence for HR and security review
  3. Use egress controls and workload accounting alerts on shared compute systems
  4. Assess transferred information and revoke unsanctioned sharing links where possible
  5. Enforce data loss prevention policies based on classification and destination

Explanation

Correct Answer

E:

Content-aware controls limit improper transfers; the ongoing control is targeted at whether network policy misuse caused data leakage, rather than a one-time emergency fix.

Incorrect Answers

A:

Approved browser access does not authorize transfers of restricted information; an investigation is not recurrence prevention in the decision about whether network policy misuse caused data leakage.

B:

Response should stop further disclosure while respecting due process; the case needs recurrence prevention addressing whether network policy misuse caused data leakage; one-time protection is not durable prevention.

C:

Visibility reduces hidden misuse; this serves whether resource consumption is policy abuse or sanctioned computation, whereas the requested result is recurrence prevention involving whether network policy misuse caused data leakage.

D:

Recovery addresses data exposure rather than only browsing access; for whether network policy misuse caused data leakage, case recovery is not future-risk control; recurrence prevention remains necessary.

Question 621

While full remediation remains pending, the commander receives this incident report: Employees report a wireless network with the company name but a different certificate prompt near reception. Which first protective measure directly limits the situation without assuming cleanup is finished?

  1. Enforce validated enterprise WLAN certificates and managed network profiles
  2. Compare BSSID, radio location, authentication certificate and approved AP inventory
  3. Locate and remove the rogue device and assess exposed credentials
  4. Disable the unsafe network profile and isolate exposed scanner sessions
  5. Warn users and coordinate wireless containment under authorized procedures

Explanation

Correct Answer

E:

Avoid indiscriminate jamming while protecting clients from the fake network; the action limits the impact connected to whether an evil twin access point is impersonating the SSID without assuming the underlying flaw is already gone.

Incorrect Answers

A:

Client authentication helps prevent evil-twin connections; the case needs initial containment or preservation addressing whether an evil twin access point is impersonating the SSID; prevention cannot replace immediate action.

B:

A familiar SSID can be broadcast by a rogue access point; when judging whether an evil twin access point is impersonating the SSID, investigation alone does not control current conditions; this is instead evidence validation.

C:

A spoofed WLAN can lead to stolen authentication data; for whether an evil twin access point is impersonating the SSID, corrective follow-through follows initial protection; initial containment or preservation remains necessary.

D:

Configuration containment stops continued transmission over the wrong path; the relevant condition for that step is whether client misassociation caused insecure traffic, which is not shown for whether an evil twin access point is impersonating the SSID.

Question 622

To distinguish suspicion from confirmed impact, the SOC examines this case: An IDS flags SQL injection signatures in encrypted traffic but the only visible artifact is TLS metadata. Which review would give the incident owner the strongest case-specific evidence?

  1. Check sensor decryption capabilities and available HTTP transaction logs
  2. Inspect HTTP host/path and application upload events where legally available
  3. Place appropriate application-layer telemetry where decryption is authorized
  4. Request authorized application-layer logs before taking destructive action

Explanation

Correct Answer

A:

Encrypted packets alone do not reveal plaintext request parameters to a passive sensor; that evidence directly tests the concern about whether the alert was based on decrypted application content, rather than relying on a single unverified indicator.

Incorrect Answers

B:

Shared infrastructure reputation cannot distinguish malicious paths without request context; the relevant condition for that step is whether trusted hosting masks unauthorized upload, which is not shown for whether the alert was based on decrypted application content.

C:

Visibility supports more defensible web-attack analysis; the goal is evidence validation for whether the alert was based on decrypted application content. Prevention is not incident verification.

D:

Additional evidence validates the claimed payload and its effect; immediate protection does not substantiate findings in the decision about whether the alert was based on decrypted application content.

Question 623

A tabletop exercise is being updated using the following real-world failure: DNS monitoring reports many TXT lookups containing unusually long random strings from a single host. Which improvement should be tracked through the next control-assurance cycle?

  1. Baseline approved destinations and alert on unexplained bulk transfers
  2. Limit the suspect host's DNS egress to approved resolvers and isolate as needed
  3. Alert on abnormal DNS volume, entropy and uncommon query patterns
  4. Find the initiating process and remove the tunnel mechanism and persistence
  5. Inspect query lengths, label entropy, resolver logs and initiating process

Explanation

Correct Answer

C:

Behavioral controls identify tunneling variants; the control owner can test whether this reduces repeat conditions affecting whether DNS tunneling may carry encoded data.

Incorrect Answers

A:

Context-aware egress detection reduces false alarms; this serves whether unusual egress is approved backup or exfiltration, whereas the requested result is recurrence prevention involving whether DNS tunneling may carry encoded data.

B:

Routing control interrupts covert outbound channels; one-time protection is not durable prevention in the decision about whether DNS tunneling may carry encoded data.

D:

Blocking one domain does not fix a compromised host; when judging whether DNS tunneling may carry encoded data, case recovery is not future-risk control; this is instead trusted restoration.

E:

Encoded payloads often manifest as repetitive atypical labels and record usage; for whether DNS tunneling may carry encoded data, an investigation is not recurrence prevention; recurrence prevention remains necessary.

Question 624

Responders are preparing to reinstate operations after this situation: A corporate Wi-Fi client associates to an unknown access point through a weak pre-shared key reused at a partner site. What should be corrected before technical closure of the incident?

  1. Rotate the exposed key and remove the unapproved device from coverage
  2. Prefer per-user or per-device enterprise authentication over shared PSKs
  3. Reprovision the scanner onto the approved secured SSID and rotate affected credentials
  4. Re-enroll legitimate clients onto a controlled WLAN configuration

Explanation

Correct Answer

D:

A safe migration restores secure connectivity; this goes beyond temporary protection and addresses the failure identified through whether PSK exposure allows unauthorized association.

Incorrect Answers

A:

Containment blocks continued access using the reused secret; for whether PSK exposure allows unauthorized association, temporary protection does not complete correction; trusted restoration remains necessary.

B:

Unique credentials enable revocation and accountability; the requirement concerns whether PSK exposure allows unauthorized association, so future hardening is not current-state recovery.

C:

Restoring intended association must address secrets possibly exposed; the other incident centers on whether client misassociation caused insecure traffic, not this trusted restoration question about whether PSK exposure allows unauthorized association.

Question 625

A technical closure review begins after this incident: An attacker spoofs a victim address in UDP queries to exposed reflection services, causing amplified replies to the victim. After the immediate situation is stabilized, what addresses the enabling failure?

  1. Filter reflected traffic upstream and coordinate with providers
  2. Inspect reply traffic patterns, protocol types and reflection source distribution
  3. Test legitimate workflows and adjust burst handling after the attack
  4. Harden UDP services against reflection and use source-address anti-spoofing
  5. Restore routing and investigate exposed reflection services in the environment

Explanation

Correct Answer

E:

Reducing local amplifiers helps prevent participation in future attacks; the recovery decision is tied to whether amplification rather than direct requests caused the flood, not merely to reduced alert volume.

Incorrect Answers

A:

Network-scale mitigation is required when amplifiers are distributed; temporary protection does not complete correction in the decision about whether amplification rather than direct requests caused the flood.

B:

Many replies from unrelated servers toward one victim suggest reflection abuse; the case needs trusted restoration addressing whether amplification rather than direct requests caused the flood; verification is not the corrective step.

C:

Recovery must validate end-user functionality as well as traffic volume; the activity targets whether mitigation is blocking legitimate clients; trusted restoration here concerns whether amplification rather than direct requests caused the flood.

D:

Ingress and egress validation reduce spoofed-packet abuse; for whether amplification rather than direct requests caused the flood, future hardening is not current-state recovery; trusted restoration remains necessary.

Question 626

The recovery owner is reviewing the underlying failure in this report: A router configuration backup exists only on the router that may have been modified by an intruder. What action most directly repairs the affected access, evidence or system state?

  1. Restrict administrative changes and preserve current configuration evidence
  2. Maintain immutable off-device network configuration backups
  3. Restore a verified approved configuration and rotate device administration secrets
  4. Deploy appropriate east-west sensors and verify collection accuracy

Explanation

Correct Answer

C:

A known-good baseline addresses configuration and credential compromise; the resulting state needs verification against the original concern: whether trusted baseline configurations are available.

Incorrect Answers

A:

Containment should prevent additional tampering before correction; the case needs trusted restoration addressing whether trusted baseline configurations are available; temporary protection does not complete correction.

B:

Independent baselines support dependable incident recovery; when judging whether trusted baseline configurations are available, future hardening is not current-state recovery; this is instead recurrence prevention.

D:

Persistent coverage should include high-value internal paths; the relevant condition for that step is whether network monitoring sees suspected east-west movement, which is not shown for whether trusted baseline configurations are available.

Question 627

The initial scene or threat protection decision concerns the following: A user operates an unapproved remote desktop relay over HTTPS, bypassing the organization's remote access gateway. How should responders limit the damage while retaining the investigation trail?

  1. Revoke the relay's access and restrict unauthorized remote-control clients
  2. Remove rogue client persistence and review accessed resources and credentials
  3. Inspect proxy destinations, executable signatures and active remote sessions
  4. Block the unapproved upload channel and preserve evidence for HR and security review

Explanation

Correct Answer

A:

Containment restores the sanctioned management boundary; the protective decision should be recorded and its effect tested against whether tunneled remote administration violates access policy.

Incorrect Answers

B:

Cleanup must account for what remote operators may have done; the requirement concerns whether tunneled remote administration violates access policy, so corrective follow-through follows initial protection.

C:

Ordinary TLS does not imply the session followed approved remote management controls; the goal is initial containment or preservation for whether tunneled remote administration violates access policy. Investigation alone does not control current conditions.

D:

Response should stop further disclosure while respecting due process; the other incident centers on whether network policy misuse caused data leakage, not this initial containment or preservation question about whether tunneled remote administration violates access policy.

Question 628

The responder must establish the timeline from this observation: A service remains unavailable after malicious traffic stops because a gateway's session table is still exhausted. Which analysis step best addresses the missing confirmation?

  1. Monitor connection state exhaustion and test recovery procedures
  2. Expire abusive state entries through approved controls without dropping all production sessions
  3. Correlate recursion queue, response latency and requester distribution
  4. Measure current session-table usage and compare with live traffic volume

Explanation

Correct Answer

D:

Residual device state can sustain an outage after the attack source subsides; the review should retain source and timing information relevant to whether stale state prevents recovery.

Incorrect Answers

A:

Capacity alarms provide earlier warning during floods; the case needs evidence validation addressing whether stale state prevents recovery; prevention is not incident verification.

B:

Selective cleanup can recover capacity while limiting disruption; when judging whether stale state prevents recovery, immediate protection does not substantiate findings; this is instead initial containment or preservation.

C:

Large recursion work can degrade DNS even if interface bandwidth is not full; it is meant to address whether resolver resource exhaustion is the outage cause, not evidence validation for whether stale state prevents recovery.

Question 629

The first task is to corroborate an alert. The case notes state: An employee routes corporate traffic through an unauthorized consumer VPN service to evade approved content restrictions. What should the investigator examine to distinguish a substantiated finding from an assumption?

  1. Enforce managed egress gateways and approved VPN clients
  2. Inspect process, destination and TLS session telemetry against allowed VPN inventory
  3. Join proxy upload metadata with data classification and employee identity
  4. Block unapproved tunnel clients through application-aware controls

Explanation

Correct Answer

B:

Encrypted traffic may hide unauthorized routing without proving the underlying payload; this evidence is scoped to whether unsanctioned tunneling bypasses inspection, not a generic system-health reading.

Incorrect Answers

A:

Controlled routes make misuse easier to detect; the requirement concerns whether unsanctioned tunneling bypasses inspection, so prevention is not incident verification.

C:

Approved browser access does not authorize transfers of restricted information; that method could help with whether network policy misuse caused data leakage; the evidence validation decision here involves whether unsanctioned tunneling bypasses inspection.

D:

Containment restores monitored egress paths while preserving logs; the case needs evidence validation addressing whether unsanctioned tunneling bypasses inspection; immediate protection does not substantiate findings.

Question 630

To distinguish suspicion from confirmed impact, the SOC examines this case: An API service fails under a small number of computationally expensive authenticated search requests. Which review would give the incident owner the strongest case-specific evidence?

  1. Correlate endpoint latency, query cost, authenticated caller and request frequency
  2. Correlate 429 rates, client identity and completed legitimate transactions
  3. Use per-client quotas, query budgets and abuse analytics
  4. Apply endpoint-specific rate limits and cost caps to abusive clients

Explanation

Correct Answer

A:

Low-volume requests can exhaust CPU or database resources without a volumetric flood; that evidence directly tests the concern about whether application-layer resource exhaustion is responsible, rather than relying on a single unverified indicator.

Incorrect Answers

B:

Excessive throttling can become a self-inflicted availability issue; the activity targets whether mitigation is blocking legitimate clients; evidence validation here concerns whether application-layer resource exhaustion is responsible.

C:

Business-aware controls limit layer-seven denial of service; the goal is evidence validation for whether application-layer resource exhaustion is responsible. Prevention is not incident verification.

D:

Application-aware throttling targets expensive requests; immediate protection does not substantiate findings in the decision about whether application-layer resource exhaustion is responsible.

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