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Amazon SCS-C03 Exam Syllabus Topics:

Topic	Details
Topic 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.
Topic 2	Infrastructure Security: This domain focuses on securing AWS infrastructure including networks, compute resources, and edge services through secure architectures, protection mechanisms, and hardened configurations.
Topic 3	Security Foundations and Governance: This domain addresses foundational security practices including policies, compliance frameworks, risk management, security automation, and audit procedures for AWS environments.
Topic 4	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.
Topic 5	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.

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Amazon AWS Certified Security - Specialty Sample Questions (Q34-Q39):

NEW QUESTION # 34
A company hosts its public website on Amazon EC2 instances behind an Application Load Balancer (ALB). The website is experiencing a global DDoS attack by a specific IoT device brand that has a unique user agent.
A security engineer is creating an AWS WAF web ACL and will associate the web ACL with the ALB. The security engineer must implement a rule statement as part of the web ACL to block the requests. The rule statement must mitigate the current attack and future attacks from these IoT devices without blocking requests from customers.
Which rule statement will meet these requirements?

A. Use a geographic match rule statement. Configure the statement to block countries that the IoT devices are located in.
B. Use a rate-based rule statement. Set a rate limit that is equal to the number of requests that are coming from the IoT devices.
C. Use an IP set match rule statement that includes the IP address for IoT devices from the user agent.
D. Use a string match rule statement that includes details of the IoT device brand from the user agent.

Answer: D

Explanation:
AWS WAF allows security engineers to create string match rule statements that inspect specific parts of web requests, including HTTP headers such as the User-Agent header. According to the AWS Certified Security - Specialty Study Guide and AWS WAF documentation, string match rules are ideal for blocking requests that contain known malicious identifiers, such as a distinctive user agent associated with a specific bot or IoT device brand.
In this scenario, the attack originates from a specific IoT device brand that uses a unique user agent. A string match rule that inspects the User-Agent header can precisely block malicious requests while allowing legitimate customer traffic to continue uninterrupted. This approach provides targeted mitigation for both current and future attacks originating from the same device signature.

NEW QUESTION # 35
A company is running a containerized application on an Amazon Elastic Container Service (Amazon ECS) cluster that uses AWS Fargate. The application runs as several ECS services.
The ECS services are in individual target groups for an internet-facing Application Load Balancer (ALB). The ALB is the origin for an Amazon CloudFront distribution. An AWS WAF web ACL is associated with the CloudFront distribution.
Web clients access the ECS services through the CloudFront distribution. The company learns that the web clients can bypass the web ACL and can access the ALB directly.
Which solution will prevent the web clients from directly accessing the ALB?

A. Create an AWS PrivateLink endpoint. Specify the existing ALB as the target. Update the CloudFront distribution by setting the PrivateLink endpoint as the origin.
B. Create a new internal ALB. Move all the ECS services to the internal ALB. Delete the internet- facing ALB. Update the CloudFront distribution by setting the internal ALB as the origin.
C. Update the CloudFront distribution by adding an X-Shared-Secret custom header for the origin.Modify the listener rules for the existing ALB to forward only the requests in which the X-Shared- Secret header has the correct value.
D. Modify the listener rules for the existing ALB. Add a condition to forward only the requests that come from IP addresses in the CloudFront origin prefix list.

Answer: C

Explanation:
The correct solution is option D because it effectively prevents direct access to the internet-facing ALB while allowing legitimate traffic that originates from Amazon CloudFront. By configuring CloudFront to include a custom HTTP header (such as X-Shared-Secret) in all origin requests, and then configuring ALB listener rules to only forward requests that contain the expected header value, the ALB will reject any requests that bypass CloudFront.
This approach is a documented AWS best practice when CloudFront is placed in front of an ALB and AWS WAF is associated with the CloudFront distribution. AWS WAF only evaluates traffic that flows through CloudFront; therefore, preventing direct access to the ALB is critical to ensure that all requests are inspected by the web ACL.

NEW QUESTION # 36
A company needs to log object-level activity in its Amazon S3 buckets. The company also needs to validate the integrity of the log file by using a digital signature. Which solution will meet these requirements?

A. Create a new S3 bucket for S3 server access logs with log file validation enabled. Enable data events. Specify Amazon S3 as the data event type.
B. Create a new S3 bucket for S3 server access logs. Configure the existing S3 buckets to send their S3 server access logs to the new S3 bucket.
C. Create an Amazon CloudWatch Logs log group. Configure the existing S3 buckets to send their S3 server access logs to the log group.
D. Create an AWS CloudTrail trail with log file validation enabled. Enable data events. Specify Amazon S3 as the data event type.

Answer: D

Explanation:
Enabling AWS CloudTrail with log file validation and data events for Amazon S3 provides object- level logging for S3 buckets and ensures log file integrity through digital signatures. CloudTrail data events capture detailed records of object-level activity, such as read and write operations, in S3 buckets. By enabling log file validation, CloudTrail adds a digital signature to each log file, allowing you to verify its integrity.

NEW QUESTION # 37
A company is building a secure solution that relies on an AWS Key Management Service (AWS KMS) customer managed key. The company wants to allow AWS Lambda to use the KMS key.
However, the company wants to prevent Amazon EC2 from using the key. Which solution will meet these requirements?

A. Use IAM explicit deny for EC2 instance profiles and allow for Lambda roles.
B. Use an SCP to deny EC2 and allow Lambda.
C. Use aws:SourceIp and aws:AuthorizedService condition keys in the KMS key policy.
D. Use a KMS key policy with kms:ViaService conditions to allow Lambda usage and deny EC2 usage.

Answer: D

Explanation:
AWS KMS access control is primarily enforced through key policies (and optionally grants), and AWS recommends using key policy condition keys to restrict how keys can be used. The kms:ViaService condition key is specifically designed to restrict KMS API usage to requests that come through a particular AWS service endpoint in a specific Region. This is the most robust way to ensure a key can be used only via AWS Lambda (for example, lambda.<region>.amazonaws.com) and not via Amazon EC2 (ec2.<region>.amazonaws.com), even if IAM permissions exist elsewhere. By writing a key policy that uses the Lambda execution role as the principal and conditions on kms:ViaService, the company can tightly bind key usage to Lambda-originated cryptographic operations while preventing use through EC2 service paths.
Option A is weaker because EC2 is not the only way an IAM principal might use KMS, and relying on attaching explicit deny policies broadly is harder to manage and can miss principals. Option C is incorrect because aws:AuthorizedService is not the typical mechanism for KMS service restriction, and SourceIp is unreliable for service-to-service calls. Option D is not ideal because SCPs do not provide fine-grained service-path restrictions for KMS usage and cannot "allow" beyond IAM; key policy controls still apply.

NEW QUESTION # 38
A company has a large fleet of Amazon Linux 2 Amazon EC2 instances that run an application processing sensitive data. Compliance requirements include no exposed management ports, full session logging, and authentication through AWS IAM Identity Center. DevOps engineers occasionally need access for troubleshooting. hich solution will provide remote access while meeting these requirements?

A. Grant access to the EC2 serial console and allow IAM role access.
B. Use Systems Manager Automation to temporarily open remote access ports.
C. Enable EC2 Instance Connect and configure security groups accordingly.
D. Assign an EC2 instance role that allows access to AWS Systems Manager. Create an IAM policy that grants access to Systems Manager Session Manager and assign it to an IAM Identity Center role.

Answer: D

Explanation:
AWS Systems Manager Session Manager provides secure, auditable shell access to EC2 instances without opening inbound ports. According to AWS Certified Security - Specialty guidance, Session Manager records all session activity to CloudWatch Logs or Amazon S3 and integrates with IAM Identity Center for centralized authentication.
This solution meets all requirements: no exposed ports, full audit logging, and identity-based access control. EC2 Instance Connect and serial console access do not integrate with Identity Center and may expose management paths.

NEW QUESTION # 39
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