タイトル：AWS Certified Security - Specialty試験テストエンジン、SCS-C03予備資料、AWS Certified Security - Specialty模擬試験

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Amazon SCS-C03 認定試験の出題範囲：

トピック	出題範囲
トピック 1	Incident Response: This domain addresses responding to security incidents through automated and manual strategies, containment, forensic analysis, and recovery procedures to minimize impact and restore operations.
トピック 2	Detection: This domain covers identifying and monitoring security events, threats, and vulnerabilities in AWS through logging, monitoring, and alerting mechanisms to detect anomalies and unauthorized access.
トピック 3	Identity and Access Management: This domain deals with controlling authentication and authorization through user identity management, role-based access, federation, and implementing least privilege principles.
トピック 4	Data Protection: This domain centers on protecting data at rest and in transit through encryption, key management, data classification, secure storage, and backup mechanisms.
トピック 5	Security Foundations and Governance: This domain addresses foundational security practices including policies, compliance frameworks, risk management, security automation, and audit procedures for AWS environments.

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100％合格SCS-C03模擬試験サンプルと真実的なSCS-C03日本語的中対策

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Amazon AWS Certified Security - Specialty 認定 SCS-C03 試験問題 (Q242-Q247):

質問 # 242
A company hosts a web application on an Apache web server. The application runs on Amazon EC2 instances that are in an Auto Scaling group. The company configured the EC2 instances to send the Apache web server logs to an Amazon CloudWatch Logs group that the company has configured to expire after 1 year.
Recently, the company discovered in the Apache web server logs that a specific IP address is sending suspicious requests to the web application. A security engineer wants to analyze the past week of Apache web server logs to determine how many requests that the IP address sent and the corresponding URLs that the IP address requested.
What should the security engineer do to meet these requirements with the LEAST effort?

A. Export the CloudWatch Logs group data to Amazon S3. Use Amazon Macie to query the logs for the specific IP address and the requested URLs.
B. Configure a CloudWatch Logs subscription to stream the log group to an Amazon OpenSearch Service cluster. Use OpenSearch Service to analyze the logs for the specific IP address and the requested URLs.
C. Use CloudWatch Logs Insights and a custom query syntax to analyze the CloudWatch logs for the specific IP address and the requested URLs.
D. Export the CloudWatch Logs group data to Amazon S3. Use AWS Glue to crawl the S3 bucket for only the log entries that contain the specific IP address. Use AWS Glue to view the results.

正解：C

解説：
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
CloudWatch Logs Insights is built to interactively search and analyze log data that is already stored in CloudWatch Logs. The Apache logs are already in a CloudWatch log group, so the least-effort solution is to run a Logs Insights query over the previous week, filter for the suspicious IP address, parse or display the requested URL field, and use stats to count requests. Exporting logs to S3, crawling with Glue, or streaming to OpenSearch introduces extra services, delay, and operational overhead. Macie is for sensitive data discovery in S3, not log query analytics. Logs Insights directly supports filtering, parsing, aggregation, and display for this exact investigation use case.

質問 # 243
A company has a single AWS account and uses an Amazon EC2 instance to test application code. The company recently discovered that the instance was compromised and was serving malware. Analysis showed that the instance was compromised 35 days ago. A security engineer must implement a continuous monitoring solution that automatically notifies the security team by email for high severity findings as soon as possible. Which combination of steps should the security engineer take to meet these requirements? (Select THREE.)

A. Create an Amazon Simple Queue Service (Amazon SQS) queue. Subscribe the security team's email distribution list to the queue.
B. Create an Amazon EventBridge rule for Security Hub findings of high severity. Configure the rule to publish a message to the queue.
C. Enable Amazon GuardDuty in the AWS account.
D. Create an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the security team's email distribution list to the topic.
E. Create an Amazon EventBridge rule for GuardDuty findings of high severity. Configure the rule to publish a message to the topic.
F. Enable AWS Security Hub in the AWS account.

正解：C、D、E

質問 # 244
A company's security engineer receives an alert that indicates that an unexpected principal is accessing a company-owned Amazon Simple Queue Service (Amazon SQS) queue. All the company's accounts are within an organization in AWS Organizations. The security engineer must implement a mitigation solution that minimizes compliance violations and investment in tools that are outside of AWS. What should the security engineer do to meet these requirements?

A. In all the VPCs in the organization, adjust the network ACLs to only accept inbound traffic from the CIDR blocks of all the VPCs in the organization. Attach the network ACLs to all the subnets in all the VPCs in the organization.
B. Create interface VPC endpoints for Amazon SQS in all the VPCs in the organization. Set the aws:SourceVpce condition to the VPC endpoint identifier on the SQS policy. Add the aws:PrincipalOrgId condition to the VPC endpoint policy.
C. Create security groups that only accept inbound traffic from the CIDR blocks of all the VPCs in the organization. Attach the security groups to all the SQS queues in all the VPCs in the organization.
D. Use a cloud access security broker (CASB) to maintain a list of managed resources. Configure the CASB to check the API and console access against that list on a web proxy.

正解：B

解説：
Amazon SQS is an AWS-managed service and does not operate within customer VPCs.
Therefore, security groups and network ACLs cannot be used to control access to SQS, making options A and B invalid. According to AWS Certified Security - Specialty documentation, the recommended approach to securely access AWS services from within a VPC is through interface VPC endpoints (AWS PrivateLink).
By creating interface VPC endpoints for Amazon SQS, the company ensures that traffic to SQS stays within the AWS network and does not traverse the public internet. Adding an SQS resource policy with the aws:SourceVpce condition restricts access so that only requests originating from the specified VPC endpoint are allowed. Additionally, using the aws:PrincipalOrgId condition ensures that only principals belonging to the same AWS Organization can access the queue.
Option D introduces an external tool, increasing cost and compliance complexity, which directly violates the requirement to minimize investment outside AWS.
AWS documentation clearly identifies VPC endpoints combined with IAM condition keys as a best practice for securing service access in multi-account environments.

質問 # 245
A company needs to build a code-signing solution using an AWS KMS asymmetric key and must store immutable evidence of key creation and usage for compliance and audit purposes. Which solution meets these requirements?

A. Log application events to Amazon CloudWatch Logs and export them.
B. Track KMS usage with CloudWatch metrics and dashboards.
C. Capture KMS API calls using EventBridge and store them in DynamoDB.
D. Create an Amazon S3 bucket with S3 Object Lock enabled. Create an AWS CloudTrail trail with log file validation enabled for KMS events. Store logs in the bucket and grant auditors access.

正解：D

解説：
AWS CloudTrail provides authoritative records of KMS key creation, origin, and usage. Enabling log file validation ensures tamper detection. S3 Object Lock in compliance mode enforces immutability, which is a core audit requirement cited in AWS Certified Security - Specialty materials.
CloudWatch and DynamoDB do not provide immutable storage guarantees suitable for compliance evidence.

質問 # 246
A company's security engineer is designing an isolation procedure for Amazon EC2 instances as part of an incident response plan. The security engineer needs to isolate a target instance to block any traffic to and from the target instance, except for traffic from the company's forensics team. Each of the company's EC2 instances has its own dedicated security group. The EC2 instances are deployed in subnets of a VPC. A subnet can contain multiple instances.
The security engineer is testing the procedure for EC2 isolation and opens an SSH session to the target instance. The procedure starts to simulate access to the target instance by an attacker. The security engineer removes the existing security group rules and adds security group rules to give the forensics team access to the target instance on port 22.
After these changes, the security engineer notices that the SSH connection is still active and usable. When the security engineer runs a ping command to the public IP address of the target instance, the ping command is blocked.
What should the security engineer do to isolate the target instance?

A. Create an AWS Systems Manager document that adds a host-level firewall rule to block all inbound traffic and outbound traffic. Run the document on the target instance.
B. Add an inbound rule to the security group to allow traffic from 0.0.0.0/0 for all ports. Add an outbound rule to the security group to allow traffic to 0.0.0.0/0 for all ports. Then immediately delete these rules.
C. Create a network ACL that is associated with the target instance's subnet. Add a rule at the top of the inbound rule set to deny all traffic from 0.0.0.0/0. Add a rule at the top of the outbound rule set to deny all traffic to 0.0.0.0/0.
D. Remove the port 22 security group rule. Attach an instance role policy that allows AWS Systems Manager Session Manager connections so that the forensics team can access the target instance.

正解：C

解説：
Amazon EC2 security groups arestateful, meaning that once a connection is established, return traffic is automatically allowed, even if the inbound rule that originally permitted the connection is later removed.
According to the AWS Certified Security - Specialty Official Study Guide and Amazon EC2 security documentation,existing connections are not terminated when security group rules change. This explains why the SSH session remains active even after the security group rules were modified, while new traffic such as ICMP ping is blocked.
To immediately and fully isolate an EC2 instance during an incident response scenario, AWS recommends usingstateless network controls. Amazon VPC network ACLs (NACLs) arestateless, which means that every packet is evaluated against the ACL rules regardless of whether the traffic is part of an existing connection. When a deny rule is added,all traffic is immediately blocked, including active sessions.
By creating a network ACL and associating it with the subnet that contains the target instance, and by adding explicit deny rules with the lowest rule numbers for both inbound and outbound traffic, the security engineer ensures thatall network communication to and from the instance is immediately interrupted. This approach satisfies the requirement to isolate the instance while preserving its runtime state and memory for forensic analysis.
Other options fail to meet the requirement because security group modifications do not terminate existing sessions, Systems Manager does not enforce network isolation, and host-level firewall changes require instance-level access and do not provide immediate, network-enforced isolation.
* AWS Certified Security - Specialty Official Study Guide
* Amazon EC2 Security Groups Documentation
* Amazon VPC Network ACL Documentation
* AWS Incident Response Best Practices

質問 # 247
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