Question 350
The incident is resolved, but its root weakness still requires policy attention: Multiple staff reuse local administrator passwords across laptops infected by a credential stealer. What durable process or monitoring change would make a repeat less likely?
- Use application allowlisting and teach verified software-update paths
- Use unique managed local administrator passwords with least privilege
- Compare local administrator credential reuse and lateral authentication logs
- Rotate affected local passwords and verify no unauthorized sessions remain
Explanation
Correct Answer
B:Non-reusable local secrets contain compromise impact; its effectiveness can be exercised against the warning conditions associated with why one infected device can lead to many endpoint logins.
Incorrect Answers
A:Policy and awareness reduce social engineering that impersonates updates; the relevant condition for that step is why user-driven fake updates bypassed approved channels, which is not shown for why one infected device can lead to many endpoint logins.
C:Shared secrets can turn a single theft into broad access; the goal is recurrence prevention for why one infected device can lead to many endpoint logins. An investigation is not recurrence prevention.
D:Credential renewal removes the reusable access route; case recovery is not future-risk control in the decision about why one infected device can lead to many endpoint logins.
Question 351
Cleanup is not considered complete. The case record describes: A Windows endpoint contains an executable masquerading as a system process in a user-writable folder. Which remediation task is necessary rather than merely suppressing the visible symptom?
- Replace altered components and fix writable library paths
- Quarantine the user-writable binary and isolate related process execution
- Alert on system-like process names executing from writable directories
- Check signer, executable path, hash and parent process rather than display name
- Remove the imposter and investigate how it was launched
Explanation
Correct Answer
E:Startup links or scripts can recreate the fraudulent process; the affected workflow should not be considered trusted until the issue of whether a process name is being spoofed is resolved.
Incorrect Answers
A:Cleaning only the signed executable misses the malicious dependency; that method could help with whether DLL side-loading caused the activity; the trusted restoration decision here involves whether a process name is being spoofed.
B:Action against the real file avoids disrupting the genuine operating-system component; when judging whether a process name is being spoofed, temporary protection does not complete correction; this is instead initial containment or preservation.
C:Path-aware monitoring distinguishes impersonation from normal OS activity; for whether a process name is being spoofed, future hardening is not current-state recovery; trusted restoration remains necessary.
D:A familiar name outside the expected protected directory can mask malware; the requirement concerns whether a process name is being spoofed, so verification is not the corrective step.
Question 352
Following initial stabilization, the team must prove recovery for this case: Following cleanup, responders cannot explain why the same malicious service reappears after a configuration-management run. Which correction must be verified before the affected service or process is restored?
- Repair or reinstall trusted security instrumentation and retest detections
- Pause the offending deployment job and quarantine its source artifacts
- Repair the trusted image or manifest and redeploy only signed verified content
- Protect build systems and require approval for baseline configuration changes
Explanation
Correct Answer
C:Root-cause cleanup must include the software distribution pipeline; the change should be tested before unrestricted operations resume for the event involving whether deployment automation is reintroducing malware.
Incorrect Answers
A:Recovery should restore the ability to observe subsequent malicious activity; the other incident centers on whether recovery validation includes monitoring health, not this trusted restoration question about whether deployment automation is reintroducing malware.
B:Stopping distribution prevents repeated contamination; the goal is trusted restoration for whether deployment automation is reintroducing malware. Temporary protection does not complete correction.
D:Supply-chain integrity is part of malware prevention; the case needs trusted restoration addressing whether deployment automation is reintroducing malware; future hardening is not current-state recovery.
Question 353
To prevent the next similar event, analysts review this case: An application server begins mining cryptocurrency and generating high CPU usage from a newly deployed container image. Which preventive change targets the exact pathway that failed?
- Redeploy from a verified image and rotate exposed workload secrets
- Compare image provenance, running process tree and outbound mining-pool traffic
- Sign and scan images and restrict unapproved registry sources
- Harden Office child-process restrictions and PowerShell telemetry
Explanation
Correct Answer
C:Software supply-chain controls reduce malicious workload deployment; this turns the weakness behind whether a malicious image is responsible for compute abuse into a measurable prevention requirement.
Incorrect Answers
A:A compromised image or credential can persist across simple restarts; the requirement concerns whether a malicious image is responsible for compute abuse, so case recovery is not future-risk control.
B:Container identity and runtime behavior establish whether the workload is compromised; the goal is recurrence prevention for whether a malicious image is responsible for compute abuse. An investigation is not recurrence prevention.
D:Application controls reduce this common execution chain; the activity targets whether a document triggered script-based malware; recurrence prevention here concerns whether a malicious image is responsible for compute abuse.
Question 354
Post-containment analysis identified this issue for correction: A finance workstation still allows unsigned macros from internet-downloaded spreadsheets. Which remediation is supported by the observed root-cause conditions?
- Disable unauthorized macro execution and quarantine the offending attachment
- Rotate affected local passwords and verify no unauthorized sessions remain
- Block internet-origin macros and use signed workflows for approved automation
- Remove persistence, validate the host and recover any modified data
Explanation
Correct Answer
D:Execution prevention does not eliminate effects already present; the resulting state needs verification against the original concern: whether document execution controls are effective.
Incorrect Answers
A:Control prevents additional users from invoking the same script; temporary protection does not complete correction in the decision about whether document execution controls are effective.
B:Credential renewal removes the reusable access route; the relevant condition for that step is why one infected device can lead to many endpoint logins, which is not shown for whether document execution controls are effective.
C:Trusted authoring controls reduce malware entry opportunities; when judging whether document execution controls are effective, future hardening is not current-state recovery; this is instead recurrence prevention.
Question 355
The incident owner requests a defensible factual determination after hearing: A trojan uses a compromised service account to read databases after its file is deleted. What fact-checking activity tests the observed failure most directly?
- Inspect service-account tokens, credential use and database audit logs
- Revoke active tokens and restrict the account while retaining audit logs
- Compare system proxy settings, installed certificates and process listeners
- Use managed identities where possible and monitor anomalous service-account use
Explanation
Correct Answer
A:File deletion does not invalidate previously stolen credentials or sessions; it makes the determination of which access path remains dangerous defensible and reviewable by the incident owner.
Incorrect Answers
B:Identity containment stops continued database access; the requirement concerns which access path remains dangerous, so immediate protection does not substantiate findings.
C:Local proxy changes can redirect traffic even after the original installer exits; the other incident centers on whether a configuration-based interception remains active, not this evidence validation question about which access path remains dangerous.
D:Reducing reusable secrets lowers credential replay risk; prevention is not incident verification in the decision about which access path remains dangerous.
Question 356
Active first response is underway for the following condition: An endpoint shows a new kernel driver shortly before security agents begin failing. What is the most appropriate short-term restriction or first-response decision?
- Isolate the host and suspend suspicious injected activity under forensic procedures
- Inspect driver-load events, signature status and kernel integrity indicators
- Disconnect the endpoint using an external network control if host sensors are untrusted
- Rebuild from trusted media and verify firmware and driver integrity as warranted
Explanation
Correct Answer
C:Out-of-band isolation avoids reliance on a potentially disabled agent; it protects the affected workflow while investigators continue resolving whether low-level tampering explains sensor loss.
Incorrect Answers
A:The active process may still communicate even with a clean disk scan; that method could help with whether in-memory execution explains the alert; the initial containment or preservation decision here involves whether low-level tampering explains sensor loss.
B:A suspicious driver can interfere with EDR visibility and operating-system protections; when judging whether low-level tampering explains sensor loss, investigation alone does not control current conditions; this is instead evidence validation.
D:Deep compromise may leave artifacts beyond an ordinary file quarantine; the requirement concerns whether low-level tampering explains sensor loss, so corrective follow-through follows initial protection.
Question 357
The team requires traceable proof for an event described as follows: An organization discovers that endpoint alerts are retained for only a day despite frequent weekend outages. What should be correlated to determine whether the case finding is justified?
- Review EDR event retention, log export and investigation access settings
- Test weekend investigation scenarios and evidence retrieval deadlines
- Forward critical endpoint events to protected central storage immediately
- Test authorized access to recovery material with the server disconnected
- Establish adequate retention with access controls and retrieval tests
Explanation
Correct Answer
A:Insufficient history can hide the initial payload and lateral movement; this evidence is scoped to whether malware telemetry will survive delayed discovery, not a generic system-health reading.
Incorrect Answers
B:Preparedness should reflect realistic detection latency; prevention is not incident verification in the decision about whether malware telemetry will survive delayed discovery.
C:Off-host records remain available if an infected endpoint is wiped; the case needs evidence validation addressing whether malware telemetry will survive delayed discovery; immediate protection does not substantiate findings.
D:A credential trapped on compromised infrastructure is not a usable emergency recovery asset; this serves whether recovery keys remain accessible during host isolation, whereas the requested result is evidence validation involving whether malware telemetry will survive delayed discovery.
E:Retention must support actual investigation windows and response obligations; for whether malware telemetry will survive delayed discovery, recovery is not factual verification; evidence validation remains necessary.
Question 358
The team needs temporary protection and must retain evidence. The observed event is: A response team cannot safely analyze unknown executables because analysts run them on production desktops. What narrowly scoped action would best control the immediate risk?
- Run samples in a controlled sandbox and preserve observations and hashes
- Forward critical endpoint events to protected central storage immediately
- Prohibit live execution on production endpoints and quarantine samples
- Inventory isolated sandbox capacity and access to safe forensic tooling
Explanation
Correct Answer
C:The containment boundary prevents analysis from spreading malware; it restricts the path implicated in whether malware analysis has appropriate isolation; later eradication and restoration remain separate decisions.
Incorrect Answers
A:An isolated test enables behavioral analysis without risking corporate workloads; for whether malware analysis has appropriate isolation, corrective follow-through follows initial protection; initial containment or preservation remains necessary.
B:Off-host records remain available if an infected endpoint is wiped; that method could help with whether malware telemetry will survive delayed discovery; the initial containment or preservation decision here involves whether malware analysis has appropriate isolation.
D:Untrusted code should be examined in a controlled environment that cannot reach business systems; investigation alone does not control current conditions in the decision about whether malware analysis has appropriate isolation.
Question 359
After technical restoration, responders document the weakness exposed by: Security monitoring sees an unsigned PowerShell process spawning from a downloaded Office document. Which long-term control would reduce exposure to this specific pattern?
- Remove the malicious document and persistence and check secondary payloads
- Sign and scan images and restrict unapproved registry sources
- Harden Office child-process restrictions and PowerShell telemetry
- Correlate Office process ancestry with PowerShell command-line and script block logs
Explanation
Correct Answer
C:Application controls reduce this common execution chain; it closes a repeatable gap revealed by whether a document triggered script-based malware without removing useful monitoring.
Incorrect Answers
A:The first script may only download or launch further components; case recovery is not future-risk control in the decision about whether a document triggered script-based malware.
B:Software supply-chain controls reduce malicious workload deployment; that method could help with whether a malicious image is responsible for compute abuse; the recurrence prevention decision here involves whether a document triggered script-based malware.
D:Parent-child and script evidence connect the document action to execution; for whether a document triggered script-based malware, an investigation is not recurrence prevention; recurrence prevention remains necessary.
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.