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Certified SOC Analyst (312-39) (312-39) — Questions 151202

202 questions total · 3pages · All types, answers revealed

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151
MCQeasy

A SOC analyst is reviewing logs in a SIEM and notices multiple failed login attempts followed by a successful one from an unknown IP. Which specific IoC category does this activity represent?

A.Data exfiltration indicator
B.Unauthorized access attempt
C.Network anomaly signature
D.System resource exhaustion
AnswerB

Failed logins followed by success is a common IoC for unauthorized access.

Why this answer

This behavior is a classic indicator of a brute-force attack or credential stuffing attempt.

152
MCQeasy

Which of the following describes 'Event Correlation' in a SIEM?

A.Linking related events to identify security threats.
B.Compressing logs for storage.
C.Generating reports for management.
D.Updating the SIEM software.
AnswerA

Correlation provides the 'story' behind individual events.

Why this answer

Correlation relates disparate events to identify a security threat.

153
MCQeasy

In the NIST Incident Response lifecycle, which phase involves the identification of the incident type and scope?

A.Preparation
B.Post-Incident Activity
C.Containment, Eradication, and Recovery
D.Detection and Analysis
AnswerD

This phase formally identifies the incident and its characteristics.

Why this answer

The Detection and Analysis phase focuses on identifying, validating, and scoping the incident.

154
MCQmedium

You are reviewing a high-severity alert. Which information is critical to gather during the initial triage?

A.The time taken to generate the alert.
B.The hardware vendor of the firewall.
C.The SIEM software version.
D.Source IP, destination host, and the involved user account.
AnswerD

These are the fundamental entities of any security incident.

Why this answer

Context like the source, destination, and user activity is required to assess risk.

155
Multi-Selecteasy

Which TWO items are part of the 'Lessons Learned' process?

Select 2 answers
A.Firing the employee who made the mistake
B.Changing the building security code
C.Identifying what went well
D.Purchasing new snacks for the SOC
E.Identifying process improvements
AnswersC, E

Core goal of the meeting.

Why this answer

Identifying what went wrong and what went right improves future responses.

156
MCQmedium

You are using an EDR to hunt for persistent scheduled tasks. Which artifact should you analyze to see tasks created within the last 24 hours?

A.Registry 'Run' keys
B.System event logs (Event ID 4698)
C.Application event logs
D.Security event logs (Event ID 4624)
AnswerB

Event ID 4698 captures scheduled task creation.

Why this answer

The Task Scheduler event logs, specifically Event ID 4698, document the creation of scheduled tasks.

157
MCQhard

You are designing a threat hunting hypothesis regarding an adversary using PowerShell for fileless execution. Which source of evidence provides the best visibility into the commands being executed?

A.Disk forensic analysis of the user's browser history
B.Windows Event Log - PowerShell Script Block Logging (Event ID 4104)
C.Windows Security Log - Process Creation (Event ID 4688)
D.Network firewall traffic logs for port 5985
AnswerB

Event ID 4104 records the full content of executed PowerShell blocks, including dynamically generated commands.

Why this answer

Script Block Logging (Event ID 4104) captures the full, de-obfuscated script content, making it the gold standard for PowerShell analysis.

158
MCQmedium

You are investigating a suspicious login. Which attribute in the Azure AD sign-in logs helps determine if the user successfully authenticated using MFA?

A.MFA Result
B.Device ID
C.Risk State
D.Conditional Access Status
AnswerA

This indicates whether MFA was satisfied.

Why this answer

The 'Authentication Requirement' or 'MFA Result' fields in Azure AD logs detail the MFA challenge status.

159
MCQmedium

You are triaging an alert in CrowdStrike Falcon. An endpoint shows a 'Suspicious File' detection. To verify the process tree and identify the parent process, which view do you use?

A.Host Timeline
B.Detection Details
C.Process Tree
D.Network Activity
AnswerC

The Process Tree displays the parent-child relationships of execution.

Why this answer

The Process Tree in CrowdStrike Falcon visualizes the genealogy of the process that triggered the detection.

160
MCQhard

You are configuring a SIEM alert and need to ensure it only triggers during business hours. Where is this configuration typically applied?

A.In the user permission settings.
B.In the log ingestion configuration.
C.In the alert's schedule or suppression settings.
D.In the dashboard settings.
AnswerC

Scheduling restricts when the rule evaluates data.

Why this answer

Time-based scheduling is a core feature for managing alert relevance in SIEMs.

161
MCQhard

You are configuring a SIEM to integrate with an EDR tool. Which data field is most important for cross-platform correlation when tracking a single user's activity across the network?

A.Timestamp
B.Device Name
C.Source IP
D.UPN
AnswerD

UPN is a unique identity anchor.

Why this answer

The UPN (User Principal Name) or SID provides the unique identifier needed for correlating activity across multiple disparate systems.

162
Multi-Selecthard

Which THREE of the following are common challenges in SIEM correlation rule development?

Select 3 answers
A.High rates of false positives.
B.The SIEM is too colorful.
C.The SIEM is too small to fit in a rack.
D.Poor log data quality.
E.Difficulty in finding skilled SIEM engineers.
AnswersA, D, E

Noise is the biggest challenge in SIEM.

Why this answer

Noise, data quality, and skill requirements are major challenges.

163
MCQhard

During a suspected lateral movement incident, you observe successful SMB sessions between two workstations. Which tool in Windows can be used to view these active sessions?

A.wmic
B.Get-SmbSession
C.tasklist
D.ipconfig
AnswerB

This command lists current SMB sessions.

Why this answer

The 'net sessions' or 'net file' command provides info on local sessions, but 'Get-SmbSession' is the modern PowerShell equivalent for this analysis.

164
Multi-Selectmedium

Which TWO actions should be taken when you find a rogue VM in your GCP environment?

Select 2 answers
A.Upgrade the VM's OS image
B.Snapshot the persistent disk for forensics
C.Restrict network ingress/egress rules
D.Increase the VM's CPU quota
E.Delete the VM immediately
AnswersB, C

Crucial for capturing the state before investigation proceeds.

Why this answer

Isolating the VM (network restrictions) and taking a disk snapshot for forensic analysis are the mandatory first steps in response.

165
MCQeasy

Which document should you reference first to determine the communication path during a high-severity security incident?

A.Incident Response Plan
B.Employee Handbook
C.Network Topology Diagram
D.Disaster Recovery Plan
AnswerA

IRP provides the necessary communication structure.

Why this answer

The Incident Response Plan (IRP) specifically defines the roles, responsibilities, and communication channels for incidents.

166
MCQmedium

You are reviewing a SIEM alert for a 'Brute Force Attack'. You notice the source IP is from a cloud provider. How should you classify this during triage?

A.Check threat intelligence feeds to see if the IP is flagged as malicious.
B.Escalate to the ISP immediately.
C.Disable the rule for all cloud traffic.
D.Ignore the alert as cloud IPs are always false positives.
AnswerA

Context from threat intel is vital for triage.

Why this answer

Cloud-based IPs are often legitimate proxies or malicious botnets; context is key.

167
Multi-Selecthard

An analyst is investigating a compromised system. Which THREE of the following artifacts are commonly checked for indicators of persistence?

Select 3 answers
A.Windows Scheduled Tasks
B.System memory dumps
C.Registry 'Run' keys
D.Startup folders
E.Event log files
AnswersA, C, D

Frequently used by malware to run at specific intervals or boot.

Why this answer

Persistence mechanisms ensure malware survives reboots or user logoffs; common locations include scheduled tasks, registry keys, and startup folders.

168
MCQmedium

When parsing unstructured logs into a structured format (JSON), which technique is most effective for mapping log fields to SIEM taxonomy?

A.Regular Expressions (Regex)
B.Manual data entry
C.Disabling field mapping
D.Using a fixed-width parser
AnswerA

Regex allows for precise extraction of fields from log lines.

Why this answer

Regular Expressions (Regex) are the industry standard for extracting specific patterns from unstructured string data.

169
MCQhard

In Azure, you suspect a compromised VM is being used for cryptocurrency mining. You want to see process-level execution details on that VM. Which tool should you use?

A.Microsoft Defender for Servers
B.Azure Advisor
C.Azure Network Watcher
D.Azure Resource Graph
AnswerA

Defender for Servers provides EDR capabilities to monitor processes on virtual machines.

Why this answer

Microsoft Defender for Cloud (specifically the Endpoint protection or integrated EDR) provides process-level visibility and alerts for suspicious activity on VMs.

170
MCQeasy

Which log management component is responsible for receiving log data from various network nodes and normalizing the format before storage?

A.End-user Workstation
B.Log Source
C.Database Engine
D.Log Aggregator
AnswerD

The aggregator is the central hub for receiving and parsing.

Why this answer

The Log Aggregator (or collector) receives data, normalizes it, and routes it to storage.

171
MCQmedium

Which SIEM feature is used to group related events into a single incident?

A.Log rotation.
B.Event correlation logic.
C.Dashboard visualization.
D.Data ingestion.
AnswerB

Correlation links disparate events into meaningful incidents.

Why this answer

Correlation engines or incident management modules group events based on shared attributes.

172
MCQmedium

An analyst is reviewing logs in Splunk to investigate a potential exfiltration event. Which field should the analyst focus on to identify the volume of data sent to an external IP?

A.session_duration
B.source_port
C.packets_received
D.bytes_sent
AnswerD

This field tracks data egress volume.

Why this answer

In common flow logs like NetFlow or firewall logs, 'bytes_sent' or 'bytes_out' indicates the amount of data transferred.

173
MCQhard

You are using a SIEM and notice that logs from a critical Windows server are missing. You verify the agent is running and the network is clear. What is the next step?

A.Reinstall the OS on the server.
B.Increase the server CPU.
C.Check the SIEM ingestion error logs for agent authentication issues.
D.Delete the server from the SIEM asset list.
AnswerC

Errors in logs will point to the root cause (e.g., certificate expiry).

Why this answer

Checking the SIEM ingestion logs or agent logs is the logical step to identify why the data is not reaching the SIEM.

174
Multi-Selectmedium

Which TWO metrics are essential for measuring the efficiency of an incident response team?

Select 2 answers
A.Number of emails sent to stakeholders
B.Mean Time to Respond (MTTR)
C.Average salary of analysts
D.Building security badge access logs
E.Incident volume per analyst
AnswersB, E

Direct measure of response speed.

Why this answer

MTTR and total number of incidents handled are standard metrics for operational efficiency.

175
MCQhard

During an investigation, you need to perform a live acquisition of a suspect's system memory using FTK Imager. What is the correct order of operations to maintain integrity?

A.Reboot, then memory dump
B.Disk image, then memory dump
C.Suspend, then disk image
D.Memory dump, then disk image
AnswerD

Memory is volatile and must be captured before disk.

Why this answer

Always capture volatile memory first, then disk, as memory changes constantly.

176
MCQhard

You are examining a suspicious file and suspect it is packed (obfuscated). Which technique or tool helps identify if a file is likely packed?

A.Process Hacker
B.Wireshark
C.Detect It Easy (DIE)
D.HashCalc
AnswerC

DIE is the standard tool for identifying if an executable is packed or protected.

Why this answer

Detect It Easy (DIE) is a tool that identifies file types and packers based on entropy and signature analysis.

177
MCQhard

While analyzing an incident involving a malicious domain, you need to determine when the domain was registered. Which database should you query?

A.DNSSEC database
B.IP Reputation database
C.WHOIS database
D.Passive DNS database
AnswerC

WHOIS contains registration history and dates.

Why this answer

WHOIS databases provide registration details for domain names.

178
MCQmedium

You want to implement log integrity monitoring to ensure that logs are not tampered with after they are written. Which method is most robust?

A.Storing logs on a local partition
B.Generating cryptographic hashes for log files
C.Clearing the logs daily
D.Setting file permissions to read-only
AnswerB

Hashing allows you to detect unauthorized changes.

Why this answer

Cryptographic hashing of log files at intervals provides an verifiable proof of log integrity.

179
MCQhard

During a suspected breach, you identify a rogue process running on a Linux server. Which command identifies the network socket associated with this process?

A.top
B.netstat -tulnp
C.ps aux
D.lsmod
AnswerB

The -p flag shows the PID associated with the socket.

Why this answer

The 'netstat -tulnp' or 'ss -tulnp' command shows the process ID alongside the listening socket.

180
MCQeasy

Which role is responsible for the ongoing tuning of correlation rules and maintaining the SIEM health in a mature SOC?

A.Security Content Engineer
B.Incident Responder
C.Compliance Officer
D.SOC Manager
AnswerA

This role focuses on SIEM rules and tuning.

Why this answer

The SOC Engineer manages the underlying SIEM infrastructure and rule efficacy.

181
Multi-Selecthard

Which THREE actions are appropriate during the eradication phase of a malware incident?

Select 3 answers
A.Patching the underlying vulnerability
B.Scanning the network for other infected hosts
C.Adding the attacker on social media
D.Removing malicious binaries
E.Deleting the entire server
AnswersA, B, D

Prevents re-infection.

Why this answer

Cleaning the malware, patching the vulnerability, and scanning the environment are core eradication steps.

182
MCQhard

You notice that your SIEM is not receiving logs from a Windows domain controller. After verifying network connectivity, you check the Windows Event Forwarding (WEF) subscription status. Which command is used to check the status of active subscriptions on the local machine?

A.wmic eventlog
B.winrm get config
C.gpresult /r
D.wecutil es
AnswerD

wecutil es displays the status of event subscriptions.

Why this answer

wecutil es (enum-subscriptions) is the standard utility for managing and checking WEF subscriptions.

183
MCQhard

An organization is migrating to a cloud-native logging architecture using AWS CloudWatch. You need to forward logs from an on-premises server to CloudWatch. Which agent is the correct choice to facilitate this stream?

A.Simple Queue Service (SQS)
B.Kinesis Firehose
C.CloudWatch Unified Agent
D.AWS Config
AnswerC

The Unified Agent is specifically designed for cross-environment collection.

Why this answer

The Unified CloudWatch Agent is designed to collect logs and metrics from both EC2 and on-premises servers.

184
MCQeasy

What is the primary function of a SIEM collector?

A.Gather and forward logs to the SIEM processing engine.
B.Analyze logs for malware.
C.Encrypt stored logs.
D.Block malicious traffic.
AnswerA

Collectors act as the ingestion point for the SIEM.

Why this answer

Collectors gather data from various sources and forward it to the main processing engine.

185
MCQmedium

You need to verify if an executable is malicious. Which site is most effective for checking the hash against multiple antivirus engines?

A.VirusTotal
B.Google Search
C.Microsoft Update
D.WHOIS
AnswerA

VirusTotal checks hashes against a massive engine database.

Why this answer

VirusTotal aggregates results from multiple AV vendors, providing a comprehensive report on a file hash.

186
Multi-Selecthard

You are conducting a threat hunt for persistence. Which THREE locations in the Windows Registry should you include in your hunt as common targets for persistence?

Select 3 answers
A.HKLM\System\CurrentControlSet\Control\Nls\Language
B.HKCU\Software\Classes\CLSID
C.HKLM\System\CurrentControlSet\Services
D.HKLM\Software\Microsoft\Windows NT\CurrentVersion\FontSubstitutes
E.HKLM\Software\Microsoft\Windows\CurrentVersion\Run
AnswersB, C, E

COM hijacking is a sophisticated method used for persistence.

Why this answer

Run keys, Services, and COM hijack locations are classic persistence vectors.

187
MCQhard

When configuring log ingestion for a cloud service in a SIEM, you notice high latency in alert generation. What is the most likely cause?

A.The SIEM storage is full.
B.The polling interval for the API is set too high.
C.The cloud provider is down.
D.The SIEM license limit is reached.
AnswerB

Frequent polling is required for near-real-time alerts.

Why this answer

API polling intervals are the most common source of latency in cloud log ingestion.

188
MCQhard

During incident lifecycle management, your team needs to transition from 'Detection' to 'Containment'. What is the most critical action to perform first within your SOAR platform's playbook?

A.Reset all user passwords
B.Perform full forensic imaging
C.Run host isolation playbook
D.Update the firewall rule base
AnswerC

Isolation is the primary containment step.

Why this answer

Isolating the affected asset prevents lateral movement before moving to eradication.

189
Multi-Selectmedium

A SOC analyst is auditing the environment for unauthorized lateral movement. Which TWO log sources are most critical for detecting remote access techniques like RDP or SMB exploitation?

Select 2 answers
A.Network traffic logs showing SMB/RDP connections between workstations
B.System clock synchronization logs
C.Application logs for Microsoft Word
D.Browser cache logs
E.Windows Security Log - Event ID 4624 (Logon events)
AnswersA, E

Direct workstation-to-workstation connections on administrative ports are highly suspicious.

Why this answer

Success/Failure logs and network connection logs are essential for detecting lateral movement attempts.

190
Multi-Selectmedium

Which TWO of the following are primary components of a cloud-native incident response plan?

Select 2 answers
A.Resource Provisioning
B.Budget Optimization
C.Hardware Refresh
D.Containment
E.Eradication
AnswersD, E

Containment is necessary to stop the spread of the incident.

Why this answer

Containment and Eradication are essential phases in the standard NIST IR lifecycle as applied to cloud environments.

191
Multi-Selectmedium

When integrating threat intelligence into your SIEM, which THREE activities should be performed to ensure the data is actionable?

Select 3 answers
A.Automate the expiration of indicators based on the intelligence aging policy
B.Store all raw intelligence feeds in an unindexed archive
C.Normalize data formats into the SIEM's schema
D.Filter indicators to remove those irrelevant to the current technology stack
E.Increase the TTL for all IP-based indicators to 'infinite'
AnswersA, C, D

Stale intelligence leads to false positives and inefficient alerting.

Why this answer

Actionable intelligence must be context-rich, relevant to the infrastructure, and integrated into existing workflows.

192
MCQeasy

What is the primary benefit of 'Threat Intelligence' integration in a SIEM?

A.Increases the log ingestion rate.
B.Provides real-time context to alerts.
C.Replaces the need for a SOC team.
D.Automates all incident response.
AnswerB

Context allows analysts to make informed decisions.

Why this answer

Threat intelligence provides context (IP reputation, malware hashes) to events.

193
MCQmedium

Which of the following describes the 'Reconnaissance' phase in the Cyber Kill Chain?

A.Deploying a remote access trojan
B.Exploiting a software vulnerability
C.Scanning for open ports and services
D.Encrypting data for ransom
AnswerC

Scanning is a primary recon activity to map the attack surface.

Why this answer

Reconnaissance involves gathering information to identify vulnerabilities before launching an attack.

194
MCQmedium

You are managing security for GCP. You need to detect if a service account has been created with excessive permissions. Which Google Cloud tool provides this insight?

A.Cloud Trace
B.Security Command Center
C.Deployment Manager
D.Cloud Billing
AnswerB

SCC monitors IAM policies and detects misconfigurations.

Why this answer

Security Command Center (SCC) provides a dashboard of findings, including misconfigurations and overly permissive IAM roles.

195
MCQhard

During an investigation of an incident, an analyst identifies a beaconing pattern in network logs. Which statistical analysis method is the most reliable for distinguishing this beaconing from normal, high-volume user traffic?

A.Check the destination IP against a reputation database
B.Compare the total volume of data sent to the IP against a global average
C.Analyze the variance in the time delta between consecutive connections to the destination IP
D.Perform a DNS lookup on the destination IP address
AnswerC

C2 beacons exhibit low variance in time intervals, unlike human-generated traffic.

Why this answer

Calculating the time delta between connections is the standard method for identifying the consistent heartbeat of C2 beacons.

196
MCQmedium

You are designing a correlation rule in Microsoft Sentinel to detect lateral movement. You decide to use KQL to join 'SecurityEvent' and 'SigninLogs'. What is the primary benefit of using a join over a union in this scenario?

A.Unions only support structured data.
B.Joins allow matching records between two datasets based on a common field.
C.Joins consume less memory than unions.
D.Unions cannot be used in detection rules.
AnswerB

Joins are essential for correlating disparate data sources.

Why this answer

Joins allow for the association of different data types based on common entities like IP addresses or hostnames.

197
Multi-Selecthard

Which THREE elements are essential in an incident notification email to senior management?

Select 3 answers
A.Business impact assessment
B.The personal phone number of the attacker
C.High-level summary of the incident
D.The full raw packet dump
E.Expected next steps/timeline
AnswersA, C, E

Management cares about the bottom line.

Why this answer

Management needs to know the impact, current status, and next steps.

198
Multi-Selectmedium

Which TWO of the following are considered indicators of a 'Data Exfiltration' attempt?

Select 2 answers
A.Multiple failed login attempts
B.System clock synchronization errors
C.Installation of new system drivers
D.Increased DNS request volume (DNS Tunneling)
E.High volume of outbound traffic to a foreign IP
AnswersD, E

DNS tunneling uses small, frequent requests to move data.

Why this answer

Exfiltration is characterized by large, anomalous outbound transfers and the use of unusual protocols.

199
MCQeasy

Which AWS service is specifically designed to act as a centralized dashboard for finding security-related misconfigurations across your entire organization?

A.AWS Artifact
B.AWS Security Hub
C.AWS Shield
D.AWS Trusted Advisor
AnswerB

Security Hub is the central console for AWS security findings.

Why this answer

AWS Security Hub aggregates findings from various AWS security services like GuardDuty, Inspector, and Config into a single view.

200
Multi-Selectmedium

Which TWO of the following are considered best practices when configuring SIEM alerts to minimize false positives?

Select 2 answers
A.Implementing Risk-Based Alerting (RBA).
B.Disabling all alerts during off-hours.
C.Using wildcard searches for all rules.
D.Setting thresholds based on baselined activity.
E.Increasing log retention to 10 years.
AnswersA, D

RBA aggregates risk, reducing individual alert noise.

Why this answer

Tuning thresholds and using risk-based alerting are key strategies.

201
MCQhard

In Azure, you have detected a suspicious VM login. You need to investigate the sign-in patterns, including geographic location and device risk level. Where in the Azure portal should you look?

A.Azure Policy Compliance dashboard
B.Azure Monitor Metrics
C.Microsoft Entra ID Sign-in logs
D.Azure Service Health
AnswerC

Sign-in logs are the primary source for identity-based access investigation.

Why this answer

Azure AD (Microsoft Entra ID) Sign-in logs provide detailed information about user authentication attempts, including risk flags and location data.

202
MCQeasy

When performing alert triage in a SIEM, which metric is most important for prioritizing incidents based on the potential business impact?

A.Alert frequency.
B.Log source vendor.
C.Asset Criticality.
D.Number of alerts per user.
AnswerC

High-value assets require immediate attention regardless of the attack type.

Why this answer

Asset criticality helps determine the priority of an incident in a real-world SOC environment.

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