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.
Question 371
The response team seeks the relevant control point for this problem: A recovered workstation looks clean but EDR telemetry stops immediately after reintegration. What protection would be proportionate to the observed incident?
- Keep the asset in restricted network access pending sensor restoration
- Keep the rebuilt device out of privileged network segments until identity trust is reset
- Check sensor heartbeat, policy status and event ingestion after network return
- Repair or reinstall trusted security instrumentation and retest detections
Explanation
Correct Answer
A:Limited connectivity prevents a blind return to production; it protects the affected workflow while investigators continue resolving whether recovery validation includes monitoring health.
Incorrect Answers
B:Network gating limits re-entry while identity risk remains; that method could help with whether endpoint trust is safe to restore; the initial containment or preservation decision here involves whether recovery validation includes monitoring health.
C:An endpoint without functioning telemetry cannot be considered fully verified; for whether recovery validation includes monitoring health, investigation alone does not control current conditions; initial containment or preservation remains necessary.
D:Recovery should restore the ability to observe subsequent malicious activity; the requirement concerns whether recovery validation includes monitoring health, so corrective follow-through follows initial protection.
Question 372
The immediate risk must be managed. The response record describes: A trojan uses a compromised service account to read databases after its file is deleted. Which intervention is most effective before full eradication or restoration?
- Revoke active tokens and restrict the account while retaining audit logs
- Disable the offending cron entry and prevent outbound payload retrieval
- Rotate affected secrets and restore least-privilege account permissions
- Inspect service-account tokens, credential use and database audit logs
Explanation
Correct Answer
A:Identity containment stops continued database access; the action limits the impact connected to which access path remains dangerous without assuming the underlying flaw is already gone.
Incorrect Answers
B:Blocking the trigger interrupts periodic reinfection; the activity targets why signature-only cleanup fails; initial containment or preservation here concerns which access path remains dangerous.
C:Changing the credential closes the persistent unauthorized access path; corrective follow-through follows initial protection in the decision about which access path remains dangerous.
D:File deletion does not invalidate previously stolen credentials or sessions; the case needs initial containment or preservation addressing which access path remains dangerous; investigation alone does not control current conditions.
Question 373
Active first response is underway for the following condition: An organization discovers that endpoint alerts are retained for only a day despite frequent weekend outages. What is the most appropriate short-term restriction or first-response decision?
- Test weekend investigation scenarios and evidence retrieval deadlines
- Review EDR event retention, log export and investigation access settings
- Establish adequate retention with access controls and retrieval tests
- Forward critical endpoint events to protected central storage immediately
- Prohibit live execution on production endpoints and quarantine samples
Explanation
Correct Answer
D:Off-host records remain available if an infected endpoint is wiped; it restricts the path implicated in whether malware telemetry will survive delayed discovery; later eradication and restoration remain separate decisions.
Incorrect Answers
A:Preparedness should reflect realistic detection latency; the case needs initial containment or preservation addressing whether malware telemetry will survive delayed discovery; prevention cannot replace immediate action.
B:Insufficient history can hide the initial payload and lateral movement; when judging whether malware telemetry will survive delayed discovery, investigation alone does not control current conditions; this is instead evidence validation.
C:Retention must support actual investigation windows and response obligations; for whether malware telemetry will survive delayed discovery, corrective follow-through follows initial protection; initial containment or preservation remains necessary.
E:The containment boundary prevents analysis from spreading malware; it is meant to address whether malware analysis has appropriate isolation, not initial containment or preservation for whether malware telemetry will survive delayed discovery.
Question 374
The team requires traceable proof for an event described as follows: A malicious browser download installs a local proxy that intercepts user sessions. What should be correlated to determine whether the case finding is justified?
- Compare system proxy settings, installed certificates and process listeners
- Compare firewall and EDR isolation changes against automation run histories
- Limit local proxy changes and monitor certificate trust-store modifications
- Disable the unauthorized proxy and isolate the endpoint for credential assessment
Explanation
Correct Answer
A:Local proxy changes can redirect traffic even after the original installer exits; it makes the determination of whether a configuration-based interception remains active defensible and reviewable by the incident owner.
Incorrect Answers
B:Control-plane conflict can reopen communication after responders block it; it is meant to address why malware containment does not persist, not evidence validation for whether a configuration-based interception remains active.
C:Configuration integrity blocks a less visible malware persistence route; the case needs evidence validation addressing whether a configuration-based interception remains active; prevention is not incident verification.
D:Stopping interception prevents additional session capture; when judging whether a configuration-based interception remains active, immediate protection does not substantiate findings; this is instead initial containment or preservation.
Question 375
To distinguish suspicion from confirmed impact, the SOC examines this case: A rebuilt endpoint is immediately rejoined to an identity domain where its machine credentials are suspected stolen. Which review would give the incident owner the strongest case-specific evidence?
- Tie reimaging playbooks to credential and certificate reissuance checks
- Review machine-account activity and authentication anomalies during compromise
- Check sensor heartbeat, policy status and event ingestion after network return
- Keep the rebuilt device out of privileged network segments until identity trust is reset
Explanation
Correct Answer
B:A clean disk does not automatically repair exposed identity secrets; it connects the question of whether endpoint trust is safe to restore to an observable record and a reproducible check.
Incorrect Answers
A:Integrated recovery prevents old credentials from surviving the rebuild; prevention is not incident verification in the decision about whether endpoint trust is safe to restore.
C:An endpoint without functioning telemetry cannot be considered fully verified; that method could help with whether recovery validation includes monitoring health; the evidence validation decision here involves whether endpoint trust is safe to restore.
D:Network gating limits re-entry while identity risk remains; for whether endpoint trust is safe to restore, immediate protection does not substantiate findings; evidence validation remains necessary.
Question 376
The initial scene or threat protection decision concerns the following: A compromised Windows host shows legitimate system tools executing encoded commands from a remote management channel. How should responders limit the damage while retaining the investigation trail?
- Decode and correlate command-line telemetry with parent process and remote session source
- Disable the implicated privileged sessions and isolate both source and target
- Revoke the unauthorized remote session and isolate its affected host
- Remove unauthorized remote-access persistence and reset impacted credentials
Explanation
Correct Answer
C:Containing the access channel disrupts abuse even when binaries are legitimate; the action limits the impact connected to whether living-off-the-land execution masks malicious behavior without assuming the underlying flaw is already gone.
Incorrect Answers
A:Signed utilities can still run attacker instructions that reveal intent; investigation alone does not control current conditions in the decision about whether living-off-the-land execution masks malicious behavior.
B:Containing identities and endpoints stops further remote execution paths; the other incident centers on whether stolen credentials enabled lateral movement, not this initial containment or preservation question about whether living-off-the-land execution masks malicious behavior.
D:Cleanup should follow the actor's access mechanism, not simply delete OS utilities; for whether living-off-the-land execution masks malicious behavior, corrective follow-through follows initial protection; initial containment or preservation remains necessary.
Question 377
Active first response is underway for the following condition: Several endpoints report unusual SMB connections and the same malicious process shortly after one laptop was infected. What is the most appropriate short-term restriction or first-response decision?
- Correlate east-west SMB flow records with common payload hashes and process starts
- Clean or rebuild infected systems and remediate the exploited SMB exposure
- Segment infected hosts and restrict unnecessary SMB access between workstations
- Stop the offending container and restrict its egress while preserving metadata
Explanation
Correct Answer
C:Blocking lateral channels reduces the outbreak rate; the immediate response addresses whether a worm propagated laterally while the team preserves relevant case records.
Incorrect Answers
A:Shared artifacts and spread timing distinguish propagation from independent alerts; the case needs initial containment or preservation addressing whether a worm propagated laterally; investigation alone does not control current conditions.
B:Removing payloads without closing the propagation route invites reinfection; when judging whether a worm propagated laterally, corrective follow-through follows initial protection; this is instead trusted restoration.
D:Containment stops resource theft without necessarily destroying the image evidence; this serves whether a malicious image is responsible for compute abuse, whereas the requested result is initial containment or preservation involving whether a worm propagated laterally.
Question 378
While full remediation remains pending, the commander receives this incident report: A server repeatedly creates an unfamiliar scheduled task that launches a remote script at midnight. Which first protective measure directly limits the situation without assuming cleanup is finished?
- Remove the malicious task and validate other startup mechanisms
- Quarantine the tampered application directory and block execution of the sidecar module
- Inspect scheduled-task definitions, creation events and task action paths
- Disable the suspect task and block its remote script endpoint
Explanation
Correct Answer
D:Stopping both trigger and delivery path limits execution; this reduces current exposure associated with which persistence artifact causes recurring execution and permits later corrective work.
Incorrect Answers
A:Cleanup should ensure the attacker did not create a second trigger; the requirement concerns which persistence artifact causes recurring execution, so corrective follow-through follows initial protection.
B:Containing the loading path prevents repeated execution without blaming the signer alone; the activity targets whether DLL side-loading caused the activity; initial containment or preservation here concerns which persistence artifact causes recurring execution.
C:These records identify the launch target and the identity establishing persistence; investigation alone does not control current conditions in the decision about which persistence artifact causes recurring execution.
Question 379
The affected workflow needs an integrity and access check following this event: An endpoint shows a new kernel driver shortly before security agents begin failing. What case-specific cleanup or recovery step establishes a trusted state?
- Remove the extension and audit any credentials or data it may have collected
- Rebuild from trusted media and verify firmware and driver integrity as warranted
- Enforce driver-signing policies and restrict driver installation privileges
- Disconnect the endpoint using an external network control if host sensors are untrusted
Explanation
Correct Answer
B:Deep compromise may leave artifacts beyond an ordinary file quarantine; this goes beyond temporary protection and addresses the failure identified through whether low-level tampering explains sensor loss.
Incorrect Answers
A:Deleting the add-on alone does not reverse possible disclosure; this serves whether the extension update introduced malicious behavior, whereas the requested result is trusted restoration involving whether low-level tampering explains sensor loss.
C:Preventive controls limit unauthorized kernel code execution; the requirement concerns whether low-level tampering explains sensor loss, so future hardening is not current-state recovery.
D:Out-of-band isolation avoids reliance on a potentially disabled agent; the goal is trusted restoration for whether low-level tampering explains sensor loss. Temporary protection does not complete correction.
Question 380
After technical restoration, responders document the weakness exposed by: A compromised Linux server runs a malicious cron job as root while the executing file has changed hashes repeatedly. Which long-term control would reduce exposure to this specific pattern?
- Restrict service creation and monitor changes to boot-time execution paths
- Rebuild the trusted scheduled-job baseline and check root access paths
- Audit privileged cron modifications and restrict write access to job directories
- Review cron entries, file histories and spawned command lines
Explanation
Correct Answer
C:Change monitoring targets persistence rather than static hashes; the assurance measure is designed around why signature-only cleanup fails, rather than hiding the reported activity.
Incorrect Answers
A:Baseline enforcement exposes stealthy persistence modifications; this serves whether startup configuration will reinfect the system, whereas the requested result is recurrence prevention involving why signature-only cleanup fails.
B:Cleaning mutable files without fixing scheduler or privileges is insufficient; the case needs recurrence prevention addressing why signature-only cleanup fails; case recovery is not future-risk control.
D:The scheduled execution pattern remains stable even when payload bytes rotate; for why signature-only cleanup fails, an investigation is not recurrence prevention; recurrence prevention remains necessary.