Question 390
The coordinator needs corrective action rather than another alert. The event was: A domain controller records privileged authentication from a compromised workstation followed by remote service creation. Which follow-through step verifies the weakness was removed?
- Disable the implicated privileged sessions and isolate both source and target
- Rotate affected credentials and remove unauthorized services after forensic collection
- Remove unauthorized remote-access persistence and reset impacted credentials
- Use tiered administration and remote-service creation monitoring
Explanation
Correct Answer
B:Restoration requires removal of both access and persistence; the affected workflow should not be considered trusted until the issue of whether stolen credentials enabled lateral movement is resolved.
Incorrect Answers
A:Containing identities and endpoints stops further remote execution paths; the goal is trusted restoration for whether stolen credentials enabled lateral movement. Temporary protection does not complete correction.
C:Cleanup should follow the actor's access mechanism, not simply delete OS utilities; the relevant condition for that step is whether living-off-the-land execution masks malicious behavior, which is not shown for whether stolen credentials enabled lateral movement.
D:Separation of privileged use limits credential theft blast radius; when judging whether stolen credentials enabled lateral movement, future hardening is not current-state recovery; this is instead recurrence prevention.
Question 391
Post-containment analysis identified this issue for correction: An engineering team disables antivirus exclusions review because build tools occasionally create false positives. Which remediation is supported by the observed root-cause conditions?
- Tune specific false positives and verify legitimate build tasks still work
- Require expiration, owner and justification for every exclusion
- Remove persistence, validate the host and recover any modified data
- Narrow or revoke unsafe exclusions after testing legitimate workloads
Explanation
Correct Answer
A:Precise policies improve both protection and availability; this goes beyond temporary protection and addresses the failure identified through whether broad exclusions hide malware execution.
Incorrect Answers
B:Governed exceptions limit long-term exposure; the case needs trusted restoration addressing whether broad exclusions hide malware execution; future hardening is not current-state recovery.
C:Execution prevention does not eliminate effects already present; this serves whether document execution controls are effective, whereas the requested result is trusted restoration involving whether broad exclusions hide malware execution.
D:Restoring visibility reduces malware concealment without needlessly blocking builds; for whether broad exclusions hide malware execution, temporary protection does not complete correction; trusted restoration remains necessary.
Question 392
Cleanup is not considered complete. The case record describes: A threat actor modifies an application's startup service to download a payload after every reboot. Which remediation task is necessary rather than merely suppressing the visible symptom?
- Disable the malicious startup entry and block its known distribution endpoint
- Restore service configuration from trusted baselines and inspect related startup entries
- Remove malicious proxy components and distrust injected certificates
- Restrict service creation and monitor changes to boot-time execution paths
Explanation
Correct Answer
B:Completeness matters because multiple persistence mechanisms can coexist; technical closure should demonstrate that the control gap behind whether startup configuration will reinfect the system is actually corrected.
Incorrect Answers
A:Both trigger and destination must be addressed to interrupt re-execution; the case needs trusted restoration addressing whether startup configuration will reinfect the system; temporary protection does not complete correction.
C:Recovering safe transport requires reversing configuration and trust changes; this serves whether a configuration-based interception remains active, whereas the requested result is trusted restoration involving whether startup configuration will reinfect the system.
D:Baseline enforcement exposes stealthy persistence modifications; the requirement concerns whether startup configuration will reinfect the system, so future hardening is not current-state recovery.
Question 393
The recurrence-prevention decision is based on this report: The team deletes ransomware notes but does not test recovered database transactions. What measure strengthens readiness against the observed event?
- Run application consistency and transaction reconciliation against known-good data
- Restore the database from a verified clean recovery point and reconcile business transactions
- Hold external transaction processing until integrity checks pass
- Protect build systems and require approval for baseline configuration changes
- Include functional restoration tests in ransomware recovery exercises
Explanation
Correct Answer
E:Service success requires more than malware absence; its effectiveness can be exercised against the warning conditions associated with whether business service recovery is complete.
Incorrect Answers
A:Removal of a visible note does not prove database integrity; the case needs recurrence prevention addressing whether business service recovery is complete; an investigation is not recurrence prevention.
B:Transaction-level reconciliation and a trustworthy recovery point address integrity failures beyond ransomware-note removal; when judging whether business service recovery is complete, case recovery is not future-risk control; this is instead trusted restoration.
C:Restricting writes prevents corrupt data from propagating; for whether business service recovery is complete, one-time protection is not durable prevention; recurrence prevention remains necessary.
D:Supply-chain integrity is part of malware prevention; the other incident centers on whether deployment automation is reintroducing malware, not this recurrence prevention question about whether business service recovery is complete.
Question 394
A long-term control assessment uses this recent event: A malware outbreak spreads by portable media in a manufacturing facility with limited network connectivity. Which change provides measurable prevention rather than an emergency workaround?
- Use controlled media transfer stations and removable-device policies
- Use least-privilege share access and immutable backup protection
- Scan and rebuild affected endpoints and sanitize or retire contaminated media
- Correlate USB insertion logs with first execution time on each affected station
Explanation
Correct Answer
A:Air-gapped operations still require ingress controls; it closes a repeatable gap revealed by whether removable media caused repeated reinfections without removing useful monitoring.
Incorrect Answers
B:Reduced write permissions and protected copies limit future losses; it is meant to address which containment step stops ongoing encryption, not recurrence prevention for whether removable media caused repeated reinfections.
C:Cleanup must cover both endpoints and the transport vehicle; the requirement concerns whether removable media caused repeated reinfections, so case recovery is not future-risk control.
D:Device-use chronology can link a shared medium to infection; the goal is recurrence prevention for whether removable media caused repeated reinfections. An investigation is not recurrence prevention.
Question 395
For the next control cycle, the responder supplies this incident history: A Windows endpoint contains an executable masquerading as a system process in a user-writable folder. Which ongoing safeguard should be implemented and tested?
- Check signer, executable path, hash and parent process rather than display name
- Control executable search paths and monitor unsigned modules in sensitive applications
- Remove the imposter and investigate how it was launched
- Alert on system-like process names executing from writable directories
Explanation
Correct Answer
D:Path-aware monitoring distinguishes impersonation from normal OS activity; it makes the lesson about whether a process name is being spoofed part of normal operations.
Incorrect Answers
A:A familiar name outside the expected protected directory can mask malware; the goal is recurrence prevention for whether a process name is being spoofed. An investigation is not recurrence prevention.
B:Reducing side-loading opportunities makes abuse harder; it is meant to address whether DLL side-loading caused the activity, not recurrence prevention for whether a process name is being spoofed.
C:Startup links or scripts can recreate the fraudulent process; the case needs recurrence prevention addressing whether a process name is being spoofed; case recovery is not future-risk control.
Question 396
An evidence-led review starts with the following report: Security monitoring sees an unsigned PowerShell process spawning from a downloaded Office document. What investigation should establish the disputed activity and its timeline?
- Harden Office child-process restrictions and PowerShell telemetry
- Correlate Office process ancestry with PowerShell command-line and script block logs
- Compare image provenance, running process tree and outbound mining-pool traffic
- Suspend the malicious process tree and isolate the endpoint for collection
- Remove the malicious document and persistence and check secondary payloads
Explanation
Correct Answer
B:Parent-child and script evidence connect the document action to execution; the objective is to establish whether a document triggered script-based malware; the result can then guide the later protective decision.
Incorrect Answers
A:Application controls reduce this common execution chain; the goal is evidence validation for whether a document triggered script-based malware. Prevention is not incident verification.
C:Container identity and runtime behavior establish whether the workload is compromised; that method could help with whether a malicious image is responsible for compute abuse; the evidence validation decision here involves whether a document triggered script-based malware.
D:Targeted interruption limits payload activity while retaining execution history; when judging whether a document triggered script-based malware, immediate protection does not substantiate findings; this is instead initial containment or preservation.
E:The first script may only download or launch further components; for whether a document triggered script-based malware, recovery is not factual verification; evidence validation remains necessary.
Question 397
A tabletop exercise is being updated using the following real-world failure: The security team has no means to retrieve a reported email from every recipient mailbox. Which improvement should be tracked through the next control-assurance cycle?
- Deploy reviewed search-and-removal workflows with audit logging
- Exercise malicious-mail recall and purge using test messages
- Review message trace, tenant search and centralized purge permissions
- Practice executive-mailbox investigations with access-governance safeguards
Explanation
Correct Answer
B:Preparedness reduces delay during a widespread phishing campaign; the control owner can test whether this reduces repeat conditions affecting whether mail incident tooling supports coordinated response.
Incorrect Answers
A:Repeatable purge operations are safer than manual per-user deletion; the goal is recurrence prevention for whether mail incident tooling supports coordinated response. Case recovery is not future-risk control.
C:Limited search access delays discovery of a campaign's full recipient set; the case needs recurrence prevention addressing whether mail incident tooling supports coordinated response; an investigation is not recurrence prevention.
D:Role readiness prevents crisis-time overprivileging; the relevant condition for that step is whether emergency mailbox investigation authority is established, which is not shown for whether mail incident tooling supports coordinated response.
Question 398
An improvement plan must address recurrence after this case: Hundreds of recipients get a malicious link, but only six clicked and two submitted passwords. What should the owner add to the normal control review to reduce recurrence?
- Join mail delivery, URL click events and identity sign-in telemetry
- Enable time-of-click URL inspection and delayed campaign rescanning
- Reset affected credentials and review anomalous mailbox access
- Correlate message campaigns with click and authentication outcomes
Explanation
Correct Answer
D:Joined telemetry produces actionable phishing severity; the ongoing control is targeted at which recipients actually reached a credential form, rather than a one-time emergency fix.
Incorrect Answers
A:Delivery alone does not establish interaction or credential compromise; an investigation is not recurrence prevention in the decision about which recipients actually reached a credential form.
B:Dynamic link evaluation catches post-delivery weaponization; the relevant condition for that step is whether delayed URL weaponization bypassed initial inspection, which is not shown for which recipients actually reached a credential form.
C:Containment of the URL does not repair account takeover; when judging which recipients actually reached a credential form, case recovery is not future-risk control; this is instead trusted restoration.
Question 399
A post-incident audit examines the following failure mode: A helpdesk receives a user-reported phish but mail logs show the same URL in hundreds of already delivered messages. What recurring check or restriction would best address the weakness?
- Automate phishing-report enrichment with campaign correlation
- Confirm removal results and assess previously interacting recipients
- Search current mailbox inventory using normalized URLs and delivery times
- Retain normalized mail telemetry for cross-gateway hunting
Explanation
Correct Answer
A:Early pattern recognition shortens organization-wide response; this turns the weakness behind whether a campaign remains active across mailboxes into a measurable prevention requirement.
Incorrect Answers
B:Completion requires both mailbox and identity review; the requirement concerns whether a campaign remains active across mailboxes, so case recovery is not future-risk control.
C:A single report can represent a much broader delivery incident; the goal is recurrence prevention for whether a campaign remains active across mailboxes. An investigation is not recurrence prevention.
D:Consistent indicators enable multi-region correlation; the relevant condition for that step is how to identify all related campaign copies, which is not shown for whether a campaign remains active across mailboxes.
Question 400
The team needs temporary protection and must retain evidence. The observed event is: The email security team lacks approved access to investigate a suspected executive mailbox compromise. What narrowly scoped action would best control the immediate risk?
- Use the preapproved emergency authorization path for least-privilege mailbox review
- Preserve one representative message and activate authorized tenant-wide search
- Inspect role assignments and incident access approvals in the mail platform
- Document authorized searches, findings and all mailbox changes
Explanation
Correct Answer
A:Controlled access avoids sharing executive passwords with responders; the immediate response addresses whether emergency mailbox investigation authority is established while the team preserves relevant case records.
Incorrect Answers
B:Central collection establishes scope before mailbox remediation; the activity targets whether mail incident tooling supports coordinated response; initial containment or preservation here concerns whether emergency mailbox investigation authority is established.
C:Without scoped permission, analysts may be unable to review audit events or remediate; when judging whether emergency mailbox investigation authority is established, investigation alone does not control current conditions; this is instead evidence validation.
D:Audit trails protect both privacy and evidence reliability; for whether emergency mailbox investigation authority is established, corrective follow-through follows initial protection; initial containment or preservation remains necessary.