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Cisco 350-201 Practice Test 83

Question 820

For an original CBRCOR educational scenario, consider: A test program changes its network endpoint each run while retaining consistent persistence and process behavior. Select TWO complementary steps: the targeted correction and its strongest prechange validation.

  1. Change: Correlate suspicious behavioral chains and distinguish authorized automation from adversary tradecraft using actor and timing evidence.
  2. Check: Align endpoint, DNS, proxy and SIEM timestamps and compare candidate events to an approved workload baseline.
  3. Check: Compare repeated sandbox runs, host artifacts, DNS requests and source-event timestamps under controlled isolation.
  4. Publish only the first sandbox IP as a permanent universal indicator and omit supporting host evidence.
  5. Change: Capture multiple corroborated sandbox indicators with confidence and classify which are stable enough for detection engineering.

Explanation

Correct Answer

C:

Combining network, file and persistence observations supports richer defensive detections than a brittle single-address blocklist. Acceptance: Detection content identifies the behavioral pattern without confusing transient infrastructure with immutable identity.

E:

Combining network, file and persistence observations supports richer defensive detections than a brittle single-address blocklist. Evidence: Compare repeated sandbox runs, host artifacts, DNS requests and source-event timestamps under controlled isolation.

Incorrect Answers

A:

Change: Correlate suspicious behavioral chains and distinguish authorized automation from adversary tradecraft using actor and timing evidence. Combining network, file and persistence observations supports richer defensive detections than a brittle single-address blocklist.

B:

Check: Align endpoint, DNS, proxy and SIEM timestamps and compare candidate events to an approved workload baseline. Combining network, file and persistence observations supports richer defensive detections than a brittle single-address blocklist.

D:

Combining network, file and persistence observations supports richer defensive detections than a brittle single-address blocklist. Use this instead: Capture multiple corroborated sandbox indicators with confidence and classify which are stable enough for detection engineering.

Question 821

A SOC analyst is examining this cybersecurity operations situation: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names. A proposed shortcut is: Promote any unreviewed wildcard extracted from malware into a global block rule with no false-positive testing. What should the SOC analyst recommend as the narrowly scoped correction? Select ONE best answer.

  1. Promote any unreviewed wildcard extracted from malware into a global block rule with no false-positive testing.
  2. Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context.
  3. Identify valuable data and entry points, draw trust boundaries and map potential abuse paths before selecting controls.
  4. Reconstruct a timestamped attack hypothesis from network and identity events and validate model output against packet or flow evidence.

Explanation

Correct Answer

B:

This targeted action addresses the observed security or operational control gap without discarding necessary controls. Applied case: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names.

Incorrect Answers

A:

For this best change assessment, the shortcut changes or bypasses the necessary correctness, governance or operational boundary rather than correcting it. Applied case: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names.

C:

Identify valuable data and entry points, draw trust boundaries and map potential abuse paths before selecting controls. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

D:

Reconstruct a timestamped attack hypothesis from network and identity events and validate model output against packet or flow evidence. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 822

A Cisco cybersecurity incident response review finds: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names. The team proposes: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context. Which engineering principle most strongly supports the recommended response? Select ONE best answer.

  1. Data loss can arise from application authorization flaws or database misuse even when no suspicious executable is detected.
  2. Effective mitigation addresses exploitability at its exposed path while preserving necessary business functions and documenting residual uncertainty.
  3. Phishing investigation requires both delivery context and downstream identity behavior because removing the message does not invalidate stolen tokens.
  4. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Explanation

Correct Answer

D:

Relevant validation before approval: Replay representative benign installer traces and malicious test artifacts and compare true and false matches. Applied case: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names.

Incorrect Answers

A:

Data loss can arise from application authorization flaws or database misuse even when no suspicious executable is detected. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

B:

Effective mitigation addresses exploitability at its exposed path while preserving necessary business functions and documenting residual uncertainty. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

Phishing investigation requires both delivery context and downstream identity behavior because removing the message does not invalidate stolen tokens. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 823

The SOC team has not yet approved changes. Current evidence indicates: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names. Which evidence best tests the technical diagnosis before approving a disruptive change? Select ONE best answer.

  1. Compare function structure, persistence behavior, network patterns and independently sourced campaign reporting.
  2. Replay representative benign installer traces and malicious test artifacts and compare true and false matches.
  3. Compare import symbols, section entropy, readable references and trusted metadata under a nonexecuting analysis tool.
  4. Compare switch-port location, device identity, traffic patterns, firmware version and documented maintenance window.

Explanation

Correct Answer

B:

This check tests the actual security, identity or operational boundary before an operationally risky response. Applied case: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names.

Incorrect Answers

A:

Compare function structure, persistence behavior, network patterns and independently sourced campaign reporting. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

Compare import symbols, section entropy, readable references and trusted metadata under a nonexecuting analysis tool. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

D:

Compare switch-port location, device identity, traffic patterns, firmware version and documented maintenance window. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 824

A candidate correction has been tested and the platform team requires a post-change acceptance check. Original problem: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names. The response owner needs positive and negative results and evidence that legitimate security and business workflows still function. Which acceptance result demonstrates correct security operations behavior without disrupting authorized workflows? Select ONE best answer.

  1. The exposure report identifies confirmed unauthorized access, bounded data scope and validated control fixes.
  2. Investigators can reproduce findings from an untampered original while analysis copies remain isolated.
  3. The case identifies confirmed malicious actions and coverage gaps while necessary evidence is retained.
  4. The published indicator preserves measured coverage without overwhelming legitimate workstation activity.

Explanation

Correct Answer

D:

The approved implementation step was: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context. Applied case: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names.

Incorrect Answers

A:

The exposure report identifies confirmed unauthorized access, bounded data scope and validated control fixes. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

B:

Investigators can reproduce findings from an untampered original while analysis copies remain isolated. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

The case identifies confirmed malicious actions and coverage gaps while necessary evidence is retained. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 825

An implementation sign-off request identifies the following problem: A sandbox extraction tool produces a domain pattern that also matches common legitimate corporate DNS names. Which paired technical change and validation should close the implementation review? Select ONE best answer.

  1. Change: Use permitted disassembly or decompilation to inspect code paths and annotate observed routines before attributing runtime behavior. Verify: Match call graphs and code references to observed sandbox traces without altering the original captured file.
  2. Change: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context. Verify: Replay representative benign installer traces and malicious test artifacts and compare true and false matches.
  3. Change: Combine concrete compromise artifacts with behavior-based attack indicators and context, separating match strength from proof of intrusion. Verify: Compare hash, DNS, process behavior, privileged changes and threat intelligence freshness against known benign conditions.
  4. Change: Validate the transfer destination, identity, data classification and approved business purpose before deciding containment and impact. Verify: Join proxy, DLP, cloud object, user and change-ticket events for the relevant upload and compare authorized baselines.

Explanation

Correct Answer

B:

The change is successful only when: The published indicator preserves measured coverage without overwhelming legitimate workstation activity.

Incorrect Answers

A:

Change: Use permitted disassembly or decompilation to inspect code paths and annotate observed routines before attributing runtime behavior. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

Change: Combine concrete compromise artifacts with behavior-based attack indicators and context, separating match strength from proof of intrusion. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

D:

Change: Validate the transfer destination, identity, data classification and approved business purpose before deciding containment and impact. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 826

A SOC analyst is examining this cybersecurity operations situation: An EDR rule built from a sample's temporary directory name alerts on every approved software installer and overwhelms triage. A proposed shortcut is: Promote any unreviewed wildcard extracted from malware into a global block rule with no false-positive testing. What should the SOC analyst recommend as the narrowly scoped correction? Select ONE best answer.

  1. Use a risk-based combination of vendor fixes, exposure restrictions, compensating controls and verification until the vulnerable path is eliminated.
  2. Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context.
  3. Promote any unreviewed wildcard extracted from malware into a global block rule with no false-positive testing.
  4. Challenge trust assumptions with realistic attacker access and validate claimed controls at actual enforcement points.

Explanation

Correct Answer

B:

This targeted action addresses the observed security or operational control gap without discarding necessary controls. Validate the premise using: Replay representative benign installer traces and malicious test artifacts and compare true and false matches.

Incorrect Answers

A:

Use a risk-based combination of vendor fixes, exposure restrictions, compensating controls and verification until the vulnerable path is eliminated. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

For this best change assessment, the shortcut changes or bypasses the necessary correctness, governance or operational boundary rather than correcting it. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

D:

Challenge trust assumptions with realistic attacker access and validate claimed controls at actual enforcement points. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 827

A Cisco cybersecurity incident response review finds: An EDR rule built from a sample's temporary directory name alerts on every approved software installer and overwhelms triage. The team proposes: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context. Which engineering principle most strongly supports the recommended response? Select ONE best answer.

  1. Behavior-based detection can recognize attack progress even when exact files and addresses are unknown.
  2. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.
  3. Hash identity is exact-file evidence while family similarity and actor attribution require corroborated, discriminating indicators.
  4. Security design assurances must account for reachable adversary paths and observable implementation, not idealized topology labels.

Explanation

Correct Answer

B:

Relevant validation before approval: Replay representative benign installer traces and malicious test artifacts and compare true and false matches. Demonstrable success requires: The published indicator preserves measured coverage without overwhelming legitimate workstation activity.

Incorrect Answers

A:

Behavior-based detection can recognize attack progress even when exact files and addresses are unknown. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

Hash identity is exact-file evidence while family similarity and actor attribution require corroborated, discriminating indicators. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

D:

Security design assurances must account for reachable adversary paths and observable implementation, not idealized topology labels. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 828

The SOC team has not yet approved changes. Current evidence indicates: An EDR rule built from a sample's temporary directory name alerts on every approved software installer and overwhelms triage. Which evidence best tests the technical diagnosis before approving a disruptive change? Select ONE best answer.

  1. Correlate parent-child processes, script content, EDR tampering, login timeline and known authorized tasks.
  2. Review token validation, authorization decisions and service account grants for negative identity and permission tests.
  3. Reconcile query audit, request principals, application logs, file hashes and destination transfers across a consistent timeline.
  4. Replay representative benign installer traces and malicious test artifacts and compare true and false matches.

Explanation

Correct Answer

D:

This check tests the actual security, identity or operational boundary before an operationally risky response. Confirm afterward that: The published indicator preserves measured coverage without overwhelming legitimate workstation activity.

Incorrect Answers

A:

Correlate parent-child processes, script content, EDR tampering, login timeline and known authorized tasks. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

B:

Review token validation, authorization decisions and service account grants for negative identity and permission tests. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

Reconcile query audit, request principals, application logs, file hashes and destination transfers across a consistent timeline. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 829

A candidate correction has been tested and the platform team requires a post-change acceptance check. Original problem: An EDR rule built from a sample's temporary directory name alerts on every approved software installer and overwhelms triage. The response owner needs positive and negative results and evidence that legitimate security and business workflows still function. Which acceptance result demonstrates correct security operations behavior without disrupting authorized workflows? Select ONE best answer.

  1. The highest-impact reachable abuse paths receive prioritized, tracked and retested control changes.
  2. The published indicator preserves measured coverage without overwhelming legitimate workstation activity.
  3. The case identifies confirmed malicious actions and coverage gaps while necessary evidence is retained.
  4. The case states supported similarity with confidence levels and avoids unsupported named-actor attribution.

Explanation

Correct Answer

B:

The approved implementation step was: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context. The result must be validated using the documented device, service or access context.

Incorrect Answers

A:

The highest-impact reachable abuse paths receive prioritized, tracked and retested control changes. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

The case identifies confirmed malicious actions and coverage gaps while necessary evidence is retained. An EDR rule built from a sample's temporary directory name alerts on every approved software installer and overwhelms triage.

D:

The case states supported similarity with confidence levels and avoids unsupported named-actor attribution. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Question 830

For an original CBRCOR educational scenario, consider: An EDR rule built from a sample's temporary directory name alerts on every approved software installer and overwhelms triage. Select TWO complementary steps: the targeted correction and its strongest prechange validation.

  1. Check: Replay representative benign installer traces and malicious test artifacts and compare true and false matches.
  2. Check: Compare scan findings, actual versions, ticket due dates, firewall test results and exception approval records.
  3. Promote any unreviewed wildcard extracted from malware into a global block rule with no false-positive testing.
  4. Change: Compare service health, source distribution, protocol anomalies and traffic baseline before classifying and escalating availability events.
  5. Change: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context.

Explanation

Correct Answer

A:

Required intervention: Validate complex indicators against benign reference telemetry and scope them with specific process, path or network context.

E:

Evidence: Replay representative benign installer traces and malicious test artifacts and compare true and false matches.

Incorrect Answers

B:

Check: Compare scan findings, actual versions, ticket due dates, firewall test results and exception approval records. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

C:

For this select two assessment, the shortcut changes or bypasses the necessary correctness, governance or operational boundary rather than correcting it. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

D:

Change: Compare service health, source distribution, protocol anomalies and traffic baseline before classifying and escalating availability events. Complex signatures need both malicious coverage and false-positive evaluation before production deployment.

Performing Cybersecurity Using Cisco Security Technologies (CBRCOR) (350-201) Practice Tests