Question 360
A containment decision is required for this incident: A ransomware affiliate disables volume shadow copies just before encrypting departmental data. What action constrains the incident at the affected point of control?
- Correlate backup-management commands with file-encryption onset
- Rebuild affected systems and recover from protected backups verified clean
- Terminate the offending execution and secure isolated recovery repositories
- Disconnect the infected client and revoke its write access to the share
Explanation
Correct Answer
C:Protecting remaining copies is crucial before broader restoration; this is a first-response safeguard for whether backup-suppression activity is part of the attack, not a substitute for full root-cause analysis.
Incorrect Answers
A:Destructive backup commands help establish intent and attack chronology; for whether backup-suppression activity is part of the attack, investigation alone does not control current conditions; initial containment or preservation remains necessary.
B:Local shadow copies may be unavailable or untrustworthy; the requirement concerns whether backup-suppression activity is part of the attack, so corrective follow-through follows initial protection.
D:Stopping the active writer limits damage while preserving clean snapshots; it is meant to address which containment step stops ongoing encryption, not initial containment or preservation for whether backup-suppression activity is part of the attack.
Question 361
A long-term control assessment uses this recent event: A rebuilt endpoint is immediately rejoined to an identity domain where its machine credentials are suspected stolen. Which change provides measurable prevention rather than an emergency workaround?
- Rotate machine credentials and validate domain enrollment under approved procedure
- Tie reimaging playbooks to credential and certificate reissuance checks
- Record infection timelines and periodically test restore-point integrity
- Review machine-account activity and authentication anomalies during compromise
Explanation
Correct Answer
B:Integrated recovery prevents old credentials from surviving the rebuild; the assurance measure is designed around whether endpoint trust is safe to restore, rather than hiding the reported activity.
Incorrect Answers
A:Trust restoration must address the identity plane as well as local files; when judging whether endpoint trust is safe to restore, case recovery is not future-risk control; this is instead trusted restoration.
C:Backup selection improves when detection history is available; the relevant condition for that step is whether a backup predates attacker persistence, which is not shown for whether endpoint trust is safe to restore.
D:A clean disk does not automatically repair exposed identity secrets; the goal is recurrence prevention for whether endpoint trust is safe to restore. An investigation is not recurrence prevention.
Question 362
The recovery owner is reviewing the underlying failure in this report: A malware outbreak spreads by portable media in a manufacturing facility with limited network connectivity. What action most directly repairs the affected access, evidence or system state?
- Scan and rebuild affected endpoints and sanitize or retire contaminated media
- Quarantine suspect removable drives and restrict new removable-media mounts
- Rebuild affected systems and recover from protected backups verified clean
- Use controlled media transfer stations and removable-device policies
Explanation
Correct Answer
A:Cleanup must cover both endpoints and the transport vehicle; the owner can validate the correction against the evidence bearing on whether removable media caused repeated reinfections.
Incorrect Answers
B:Physical medium control prevents another host from receiving the payload; the goal is trusted restoration for whether removable media caused repeated reinfections. Temporary protection does not complete correction.
C:Local shadow copies may be unavailable or untrustworthy; the activity targets whether backup-suppression activity is part of the attack; trusted restoration here concerns whether removable media caused repeated reinfections.
D:Air-gapped operations still require ingress controls; the case needs trusted restoration addressing whether removable media caused repeated reinfections; future hardening is not current-state recovery.
Question 363
A responder is tasked with limiting immediate impact after this report: A domain controller records privileged authentication from a compromised workstation followed by remote service creation. Which immediate safeguard protects the case while later remediation is planned?
- Segment infected hosts and restrict unnecessary SMB access between workstations
- Rotate affected credentials and remove unauthorized services after forensic collection
- Disable the implicated privileged sessions and isolate both source and target
- Join authentication events with remote service installation and source-host timing
Explanation
Correct Answer
C:Containing identities and endpoints stops further remote execution paths; the protective decision should be recorded and its effect tested against whether stolen credentials enabled lateral movement.
Incorrect Answers
A:Blocking lateral channels reduces the outbreak rate; the activity targets whether a worm propagated laterally; initial containment or preservation here concerns whether stolen credentials enabled lateral movement.
B:Restoration requires removal of both access and persistence; for whether stolen credentials enabled lateral movement, corrective follow-through follows initial protection; initial containment or preservation remains necessary.
D:The sequence ties credential use to code execution on another machine; the goal is initial containment or preservation for whether stolen credentials enabled lateral movement. Investigation alone does not control current conditions.
Question 364
During lessons learned, the security owner reviews this completed incident: Following cleanup, responders cannot explain why the same malicious service reappears after a configuration-management run. Which repeatable safeguard best prevents this failure mode in the future?
- Protect build systems and require approval for baseline configuration changes
- Repair the trusted image or manifest and redeploy only signed verified content
- Make EDR-health checks a formal exit criterion for quarantine
- Tie reimaging playbooks to credential and certificate reissuance checks
- Pause the offending deployment job and quarantine its source artifacts
- Compare management manifests and agent execution times with service recreation
Explanation
Correct Answer
A:Supply-chain integrity is part of malware prevention; this turns the weakness behind whether deployment automation is reintroducing malware into a measurable prevention requirement.
Incorrect Answers
B:Root-cause cleanup must include the software distribution pipeline; the goal is recurrence prevention for whether deployment automation is reintroducing malware. Case recovery is not future-risk control.
C:Monitoring continuity reduces silent reinfection; it is meant to address whether recovery validation includes monitoring health, not recurrence prevention for whether deployment automation is reintroducing malware.
D:Integrated recovery prevents old credentials from surviving the rebuild; the other incident centers on whether endpoint trust is safe to restore, not this recurrence prevention question about whether deployment automation is reintroducing malware.
E:Stopping distribution prevents repeated contamination; when judging whether deployment automation is reintroducing malware, one-time protection is not durable prevention; this is instead initial containment or preservation.
F:A compromised image or script can reinstall artifacts on clean endpoints; for whether deployment automation is reintroducing malware, an investigation is not recurrence prevention; recurrence prevention remains necessary.
Question 365
A triage analyst needs to test a report involving these details: Memory scanning reveals injected code in a legitimate browser process although no malicious file exists on disk. Which evidence collection or correlation is most relevant to this claim?
- Inspect extension IDs, permission changes, update provenance and browser events
- Isolate the host and suspend suspicious injected activity under forensic procedures
- Monitor remote thread creation and anomalous process-memory access
- Investigate the injector and persistence mechanism before rebuilding the endpoint
- Capture process memory, memory maps and injection-related events
Explanation
Correct Answer
E:Runtime evidence can reveal payloads invisible to file-only scanning; for this investigation, the relevant uncertainty is whether in-memory execution explains the alert, so independent confirmation matters.
Incorrect Answers
A:New host permissions and update history can explain unexpected data access; the activity targets whether the extension update introduced malicious behavior; evidence validation here concerns whether in-memory execution explains the alert.
B:The active process may still communicate even with a clean disk scan; for whether in-memory execution explains the alert, immediate protection does not substantiate findings; evidence validation remains necessary.
C:Behavioral telemetry can detect fileless injection; the requirement concerns whether in-memory execution explains the alert, so prevention is not incident verification.
D:A clean browser executable does not exclude compromise in the process tree; the goal is evidence validation for whether in-memory execution explains the alert. Recovery is not factual verification.
Question 366
A post-incident audit examines the following failure mode: A finance workstation still allows unsigned macros from internet-downloaded spreadsheets. What recurring check or restriction would best address the weakness?
- Remove persistence, validate the host and recover any modified data
- Require expiration, owner and justification for every exclusion
- Block internet-origin macros and use signed workflows for approved automation
- Inspect Office macro trust state, file origin markings and process ancestry
Explanation
Correct Answer
C:Trusted authoring controls reduce malware entry opportunities; it closes a repeatable gap revealed by whether document execution controls are effective without removing useful monitoring.
Incorrect Answers
A:Execution prevention does not eliminate effects already present; case recovery is not future-risk control in the decision about whether document execution controls are effective.
B:Governed exceptions limit long-term exposure; the other incident centers on whether broad exclusions hide malware execution, not this recurrence prevention question about whether document execution controls are effective.
D:Internet-origin macros provide an avoidable initial execution surface; for whether document execution controls are effective, an investigation is not recurrence prevention; recurrence prevention remains necessary.
Question 367
For the next control cycle, the responder supplies this incident history: A workstation repeatedly contacts algorithmically generated domains after an unexplained process starts at login. Which ongoing safeguard should be implemented and tested?
- Detect unusual command-line patterns and restrict remote administration exposure
- Correlate DNS query sequences with process creation and network connections
- Remove the associated persistence and examine credentials used by the process
- Detect unusual NXDOMAIN bursts and rare-domain patterns
Explanation
Correct Answer
D:Behavioral rules can catch domain rotation without static block lists; the ongoing control is targeted at whether the host exhibits domain-generation command traffic, rather than a one-time emergency fix.
Incorrect Answers
A:Context-aware behavioral policies distinguish abuse from valid operations; the activity targets whether living-off-the-land execution masks malicious behavior; recurrence prevention here concerns whether the host exhibits domain-generation command traffic.
B:High-volume pseudo-random lookups tied to one process support a DGA hypothesis; an investigation is not recurrence prevention in the decision about whether the host exhibits domain-generation command traffic.
C:Eradication must address how the unwanted process restarts or maintains access; the case needs recurrence prevention addressing whether the host exhibits domain-generation command traffic; case recovery is not future-risk control.
Question 368
The initial scene or threat protection decision concerns the following: A user reports a browser extension silently reading sensitive form fields after a recent update. How should responders limit the damage while retaining the investigation trail?
- Quarantine the user-writable binary and isolate related process execution
- Remove the extension and audit any credentials or data it may have collected
- Disable the suspicious extension through managed browser policy
- Inspect extension IDs, permission changes, update provenance and browser events
- Allowlist reviewed extensions and monitor new sensitive permissions
Explanation
Correct Answer
C:Central disablement stops its access across affected browsers; the action limits the impact connected to whether the extension update introduced malicious behavior without assuming the underlying flaw is already gone.
Incorrect Answers
A:Action against the real file avoids disrupting the genuine operating-system component; the other incident centers on whether a process name is being spoofed, not this initial containment or preservation question about whether the extension update introduced malicious behavior.
B:Deleting the add-on alone does not reverse possible disclosure; the case needs initial containment or preservation addressing whether the extension update introduced malicious behavior; corrective follow-through follows initial protection.
D:New host permissions and update history can explain unexpected data access; for whether the extension update introduced malicious behavior, investigation alone does not control current conditions; initial containment or preservation remains necessary.
E:Governed extensions limit this endpoint attack surface; the requirement concerns whether the extension update introduced malicious behavior, so prevention cannot replace immediate action.
Question 369
Following initial stabilization, the team must prove recovery for this case: A response team cannot safely analyze unknown executables because analysts run them on production desktops. Which correction must be verified before the affected service or process is restored?
- Run samples in a controlled sandbox and preserve observations and hashes
- Use disposable analysis environments with network controls and reset procedures
- Prohibit live execution on production endpoints and quarantine samples
- Establish adequate retention with access controls and retrieval tests
Explanation
Correct Answer
A:An isolated test enables behavioral analysis without risking corporate workloads; the resulting state needs verification against the original concern: whether malware analysis has appropriate isolation.
Incorrect Answers
B:Safe laboratory processes support repeatable malware investigation; the goal is trusted restoration for whether malware analysis has appropriate isolation. Future hardening is not current-state recovery.
C:The containment boundary prevents analysis from spreading malware; temporary protection does not complete correction in the decision about whether malware analysis has appropriate isolation.
D:Retention must support actual investigation windows and response obligations; the other incident centers on whether malware telemetry will survive delayed discovery, not this trusted restoration question about whether malware analysis has appropriate isolation.
Question 370
The first task is to corroborate an alert. The case notes state: Multiple staff reuse local administrator passwords across laptops infected by a credential stealer. What should the investigator examine to distinguish a substantiated finding from an assumption?
- Restrict exposed administrative access and isolate endpoints using the same credentials
- Compare local administrator credential reuse and lateral authentication logs
- Use unique managed local administrator passwords with least privilege
- Inspect endpoint policy scope and detections in excluded directories
Explanation
Correct Answer
B:Shared secrets can turn a single theft into broad access; this permits a traceable finding about why one infected device can lead to many endpoint logins before the team makes a disruptive change.
Incorrect Answers
A:The attacker should not retain easy access to parallel machines; the case needs evidence validation addressing why one infected device can lead to many endpoint logins; immediate protection does not substantiate findings.
C:Non-reusable local secrets contain compromise impact; for why one infected device can lead to many endpoint logins, prevention is not incident verification; evidence validation remains necessary.
D:Unbounded exceptions can make attacker-controlled paths invisible; the relevant condition for that step is whether broad exclusions hide malware execution, which is not shown for why one infected device can lead to many endpoint logins.