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Amazon SCS-C03 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Infrastructure Security	18%	- Secure compute and storage resources 1. Encrypt data at rest and in transit 2. Manage access to storage services 3. Harden operating systems and applications - Protect workloads and applications 1. Secure containerized and serverless environments 2. Implement security groups and firewalls - Design and implement secure network architecture 1. Implement network access control and segmentation 2. Protect network traffic and communications 3. Secure VPC design and configuration
Topic 2: Data Protection	18%	- Implement encryption and key management 1. Manage encryption keys using AWS KMS and CloudHSM 2. Encrypt data across all storage and processing layers - Design and implement data protection strategies 1. Classify and categorize data 2. Define data retention and disposal policies - Secure data access and sharing 1. Control access to sensitive data 2. Implement secure data transfer and sharing mechanisms
Topic 3: Identity and Access Management	20%	- Secure authentication and authorization 1. Integrate with external identity providers 2. Manage federated access 3. Implement multi-factor authentication - Design and implement secure access strategies 1. Manage identities and permissions at scale 2. Implement least privilege access models 3. Use IAM policies, roles, and permissions boundaries - Monitor and audit access activity 1. Detect and remediate excessive permissions 2. Review access logs and reports
Topic 4: Security Foundations and Governance	14%	- Secure development and operations 1. Implement security as code 2. Integrate security into CI/CD pipelines - Manage security risk and compliance 1. Implement compliance controls and reporting 2. Perform risk assessments and audits - Establish security frameworks and compliance 1. Align with industry standards and regulations 2. Implement security policies and standards
Topic 5: Detection	16%	- Automate detection and response workflows 1. Implement event-driven security automation 2. Integrate security tools and services - Design and implement threat detection mechanisms 1. Detect anomalies and potential security incidents 2. Use AWS security services for monitoring and alerting 3. Configure and manage log collection and analysis
Topic 6: Incident Response	14%	- Implement post-incident activities 1. Update security controls and processes 2. Document lessons learned - Develop incident response plans and procedures 1. Establish communication and escalation processes 2. Define roles and responsibilities - Investigate and remediate security incidents 1. Contain, eradicate, and recover from incidents 2. Conduct forensic analysis on AWS resources

>> SCS-C03 Fragen&Antworten <<

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Amazon AWS Certified Security - Specialty SCS-C03 Prüfungsfragen mit Lösungen (Q188-Q193):

188. Frage
A company has hundreds of AWS accounts in an organization in AWS Organizations. The company operates out of a single AWS Region. The company has a dedicated security tooling AWS account in the organization.
The security tooling account is configured as the organization ' s delegated administrator for Amazon GuardDuty and AWS Security Hub. The company has configured the environment to automatically enable GuardDuty and Security Hub for existing AWS accounts and new AWS accounts.
The company is performing control tests on specific GuardDuty findings to make sure that the company ' s security team can detect and respond to security events. The security team launched an Amazon EC2 instance and attempted to run DNS requests against a test domain,example.com, to generate a DNS finding. However, the GuardDuty finding was never created in the Security Hub delegated administrator account.
Why was the finding not created in the Security Hub delegated administrator account?

A. Cross-Region aggregation in Security Hub was not configured.
B. The GuardDuty integration with Security Hub was never activated in the AWS account where the finding was generated.
C. VPC flow logs were not turned on for the VPC where the EC2 instance was launched.
D. The VPC where the EC2 instance was launched had the DHCP option configured for a custom OpenDNS resolver.

Antwort: D

Begründung:
GuardDuty's DNS-related detections depend on GuardDuty being able to observeDNS query behaviorthrough AWS-provided DNS resolution paths in the VPC. If a VPC is configured to use acustom DNS resolvervia DHCP options (for example, an OpenDNS resolver) instead of the AmazonProvidedDNS resolver, DNS queries may bypass the visibility path GuardDuty relies on for DNS analysis and pattern detection. In that case, the test traffic (queries to example.com) might not be evaluated by GuardDuty's DNS finding logic, so no DNS finding is generated-and therefore nothing is forwarded into Security Hub.
Option A is incorrect because VPC flow logs are not a prerequisite for GuardDuty to produce DNS findings; GuardDuty uses native telemetry sources and does not require customer-managed flow logs to be enabled.
Option D is irrelevant because the company operates in a single Region, and cross-Region aggregation would not be required for the delegated administrator to see findings from the same Region. Option C is less likely given the setup explicitly states GuardDuty and Security Hub are automatically enabled across accounts; also, even if enabled, the specific lack of a DNS finding points to DNS visibility/configuration rather than a downstream integration toggle.

189. Frage
A security engineer needs to implement a solution to create and control the keys that a company uses for cryptographic operations. The security engineer must create symmetric keys in which the key material is generated and used within a custom key store that is backed by an AWS CloudHSM cluster. The security engineer will use symmetric and asymmetric data key pairs for local use within applications. The security engineer also must audit the use of the keys.
How can the security engineer meet these requirements?

A. To create the keys, use AWS Key Management Service (AWS KMS) and the custom key stores with the CloudHSM cluster. For auditing, use Amazon GuardDuty.
B. To create the keys, use Amazon S3 and the custom key stores with the CloudHSM cluster. For auditing, use AWS CloudTrail.
C. To create the keys, use AWS Key Management Service (AWS KMS) and the custom key stores with the CloudHSM cluster. For auditing, use Amazon Athena.
D. To create the keys, use AWS Key Management Service (AWS KMS) and the custom key stores with the CloudHSM cluster. For auditing, use AWS CloudTrail.

Antwort: D

Begründung:
The requirement is to havekey material generated and used inside a custom key store backed by an AWS CloudHSM cluster. This is exactly whatAWS KMS Custom Key Storesprovide: KMS manages the keys and policies, but the cryptographic operations for those KMS keys occur in the associatedCloudHSMcluster, keeping the key material within HSM boundaries. For applications that needlocal-use data keys(both symmetric data keys and asymmetric data key pairs), KMS supports generating data keys and data key pairs that applications can use for envelope encryption and local cryptographic operations, while the master key protections remain within KMS (and within CloudHSM when using a custom key store).
For auditing, AWS best practice isAWS CloudTrail, which records KMS API calls (such as CreateKey, GenerateDataKey, GenerateDataKeyPair, Encrypt/Decrypt, etc.) and provides an immutable event history for compliance and investigation. Athena can query logs, but it is not the primary audit record source; GuardDuty is for threat detection, not authoritative key-usage auditing. Therefore, the correct combination isKMS with a CloudHSM-backed custom key storeplusCloudTrailfor auditability.

190. Frage
A security engineer recently rotated the host keys for an Amazon EC2 instance. The security engineer is trying to access the EC2 instance by using the EC2 Instance Connect feature.
However, the security engineer receives an error for failed host key validation. Before the rotation of the host keys, EC2 Instance Connect worked correctly with this EC2 instance.
What should the security engineer do to resolve this error?

A. Manually upload the new host key to the AWS trusted host keys database.
B. Import the key material into AWS Key Management Service (AWS KMS).
C. Ensure that the AmazonSSMManagedInstanceCore policy is attached to the EC2 instance profile.
D. Create a new SSH key pair for the EC2 instance.

Antwort: A

Begründung:
EC2 Instance Connect can performserver/host authenticity checksby validating the instance's SSHhost keyagainst atrusted host keyssource. When you rotate the instance's host keys, the host presents anewfingerprint. If the trusted host keys source still contains theoldhost key, connections that enforce host key verification will fail with ahost key validationerror. The fix is to update the trusted host key record so the new host key fingerprint is recognized as valid.
Therefore, the correct action is toupload the new host keyto the trusted host keys database used for EC2 Instance Connect host key verification.

191. Frage
A security engineer is troubleshooting an AWS Lambda function that is namedMyLambdaFunction. The function is encountering an error when the function attempts to read the objects in an Amazon S3 bucket that is namedDOC-EXAMPLE-BUCKET. The S3 bucket has the following bucket policy:
{
" Effect " : " Allow " ,
" Principal " : { " Service " : " lambda.amazonaws.com " },
" Action " : " s3:GetObject " ,
" Resource " : " arn:aws:s3:::DOC-EXAMPLE-BUCKET " ,
" Condition " : {
" ArnLike " : {
" aws:SourceArn " : " arn:aws:lambda:::function:MyLambdaFunction "
}
}
}
Which change should the security engineer make to the policy to ensure that the Lambda function can read the bucket objects?

A. Change the Action element to the following:[ " s3:GetObject* " , " s3:GetBucket* " ]
B. Remove the Condition element. Change the Principal element to the following:{ " AWS " : " arn:aws:
lambda:::function:MyLambdaFunction " }
C. Change the Resource element to " arn:aws:lambda:::function:MyLambdaFunction " . Change the Principal element to the following:{ " Service " : " s3.amazonaws.com " }
D. Change the Resource element to " arn:aws:s3:::DOC-EXAMPLE-BUCKET/* " .

Antwort: D

Begründung:
The policy currently grants s3:GetObject but targets thebucket ARN(arn:aws:s3:::DOC-EXAMPLE- BUCKET). For Amazon S3, object-level actions such asGetObjectmust referenceobject ARNs, not the bucket ARN. The correct resource pattern is the bucket ARNwith /*appended (for example, arn:aws:s3:::DOC- EXAMPLE-BUCKET/*) so the permission applies to objects within the bucket. Without this, S3 evaluates the request against a resource that does not match the requested object, resulting in an access denial even though the action appears correct.
The other options do not address the root cause. Expanding actions (Option B) is unnecessary and overly permissive, and it still would not fix the incorrect resource ARN for object reads. Changing principals or removing conditions (Option A) is not required just to allow reads-Lambda typically accesses S3 using the function'sexecution role, and bucket policies are commonly used for cross-account or service-based access control, but the immediate failure here is the mismatch between s3:GetObject and the bucket-only resource.
Option D is invalid because it inverts principal/service usage and sets an incorrect resource type for S3 authorization.

192. Frage
A company manages multiple AWS accounts through an organization in AWS Organizations. The company enables all features in the organization.
A security team must implement a solution to centrally manage VPC security groups across the accounts. The company uses an existing reference security group with the required configuration.
The solution must detect if security group rules have been modified to deviate from the reference security group. The solution must automatically restore any noncompliant security groups to match the reference security group. The security team needs to select a solution that does not require custom development or scripting.
Which solution will meet these requirements?

A. Create an AWS Systems Manager Automation runbook to identify and align noncompliant security groups with the reference security group.
B. Use AWS Firewall Manager to manage security group rules through security group policy rules.
C. Use a custom AWS Config rule with auto remediation. Compare to the reference security group for compliance.
D. Manage security groups through AWS CloudFormation StackSets. Use the reference security group for the initial rules.

Antwort: B

Begründung:
AWS Firewall Manager is the correct no-code centralized service for managing security groups across AWS Organizations. Firewall Manager security group policies can apply centrally controlled security group policies, audit rules, identify noncompliant security groups, and remediate deviations. AWS documentation states that Firewall Manager continuously maintains policies and applies them to accounts and resources as they are added or updated across the organization. It also supports common security group policies that replicate primary security groups and keep replicas synchronized with the primary. Systems Manager Automation or custom AWS Config remediation would require custom logic. CloudFormation StackSets can deploy initial security groups, but it does not continuously detect and automatically restore out-of- band rule changes in the required governance model.

193. Frage
......

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