Pass the Amazon Web Services AWS Certified Specialty SCS-C02 Questions and answers with Dumpstech

The correct answer is C. The GuardDuty integration with Security Hub was never activated in the AWS account where the finding was generated.

The reason is that Security Hub does not automatically receive findings from GuardDuty unless the integration is activated in each AWS account.According to the AWS documentation1, “The Amazon GuardDuty integration with Security Hub enables you to send findings from GuardDuty to Security Hub. Security Hub can then include those findings in its analysis of your security posture.” However, this integration is not enabled by default and requires manual activation in each AWS account.The documentation1also states that “You must activate the integration in each AWS account that you want to send findings from GuardDuty to Security Hub.”

Therefore, even though the company has configured the security tooling account as the delegated administrator for GuardDuty and Security Hub, and has enabled these services for existing and new AWS accounts, it still needs to activate the GuardDuty integration with Security Hub in each account. Otherwise, the findings from GuardDuty will not be sent to Security Hub and will not be visible in the delegated administrator account.

The other options are incorrect because:

A. VPC flow logs are not required for GuardDuty to generate DNS findings. GuardDuty uses VPC flow logs as one of the data sources for network connection findings, but not for DNS findings.According to the AWS documentation2, “GuardDuty uses VPC Flow Logs as a data source for network connection findings.”

B. The VPC DHCP option configured for a custom OpenDNS resolver does not affect GuardDuty’s ability to generate DNS findings. GuardDuty uses DNS logs as one of the data sources for DNS findings, regardless of the DNS resolver used by the VPC.According to the AWS documentation2, “GuardDuty uses DNS logs as a data source for DNS activity findings.”

D. Cross-Region aggregation in Security Hub is not relevant for this scenario, since the company operates out of a single AWS Region. Cross-Region aggregation in Security Hub allows you to aggregate security findings from multiple Regions into a single Region, where you can view and manage them. However, this feature is not needed if the company only uses one Region.According to the AWS documentation3, “Cross-Region aggregation enables you to aggregate security findings from multiple Regions into a single Region.”

The correct answer is C. Create rule sets in AWS CloudFormation Guard. Run validation checks for CloudFormation templates as a phase of the CI/CD process.

This answer is correct because AWS CloudFormation Guard is a tool that helps you implement policy-as-code for your CloudFormation templates. You can use Guard to write rules that define your security policies, such as requiring encryption for EBS volumes, and then validate your templates against those rules before deploying them.You can integrate Guard into your CI/CD pipeline as a step that runs the validation checks and prevents the deploymentof any non-compliant templates12.

The other options are incorrect because:

A. Turning on AWS Trusted Advisor and configuring security notifications as webhooks in the preferences section of the CI/CD pipeline is not a solution, because AWS Trusted Advisor is not a policy-as-code tool, but a service that provides recommendations to help you follow AWS best practices.Trusted Advisor does not allow you to define your own security policies or validate your CloudFormationtemplates against them3.

B. Turning on AWS Config and using the prebuilt or customized rules is not a solution, because AWS Config is not a policy-as-code tool, but a service that monitors and records the configuration changes of your AWS resources.AWS Config does not allow you to validate your CloudFormation templates before deploying them, but onlyevaluates the compliance of your resources after they are created4.

D. Creating rule sets as SCPs and integrating them as a part of validation control in a phase of the CI/CD process is not a solution, because SCPs are not policy-as-code tools, but policies that you can use to manage permissions in your AWS Organizations.SCPs do not allow you to validate your CloudFormation templates, but only restrict the actions that users and roles can perform in your accounts5.

To implement host-based security for Amazon EC2 instances and containers in Amazon ECR with minimal operational overhead and ensure automatic deployment and scanning for new workloads, the recommended solution is to configure a delegated administrator for Amazon Inspector within the AWS Organizations structure. By enabling Amazon Inspector for the organization and configuring it to automatically scan new member accounts, the company can ensure that all EC2 instances and ECR containers are analyzed for software vulnerabilities and unintended network exposure. Amazon Inspector will automatically assess the workloads and push findings to AWS Security Hub, providing centralized security monitoring and compliance checking. This approach ensures that as new accounts orworkloads are added, they are automatically included in the security assessments, maintaining a consistent security posture across the organization with minimal manual intervention.

Set Up AWS Client VPN:

Deploy a Client VPN endpoint in the region where the VPCs are located.

Authorization Rule:

Configure the VPN endpoint with authorization rules to allow access only to the specific VPC subnets that the consultant needs.

VPC Peering Consideration:

Ensure routing between the peered VPCs is correctly configured to allow traffic from the Client VPN endpoint.

Advantages:

Secure Access: Provides encrypted access to the VPCs.

Granular Control: Restricts access to only required resources.

AWS Client VPN Documentation

Authorization Rules for Client VPN

The correct combination of conditions to add to the IAM policy is A and C. These conditions will ensure that IAM users must use MFA to access certain services in the AWS production account, and that each session will expire after 2 hours.

Option A: “Bool” : { “aws:MultiFactorAuthPresent” : “true” } is a valid condition that checks if the principal (the IAM user) has authenticated with MFA before making the request. This condition will enforce MFA for the IAM users to accessthe specified services.This condition key is supported by all AWS services that support IAM policies1.

Option B: “Bool” : { “aws:MultiFactorAuthPresent” : “false” } is the opposite of option A. This condition will allow access only if the principal has not authenticated with MFA, which is not the desired requirement.This condition key is supported by all AWS services that support IAM policies1.

Option C: “NumericLessThan” : { “aws:MultiFactorAuthAge” : “7200” } is a valid condition that checks if the time since the principal authenticated with MFA is less than 7200 seconds (2 hours). This condition will enforce the session duration limit for the IAM users.This condition key is supported by all AWS services that support IAM policies1.

Option D: “NumericGreaterThan” : { “aws:MultiFactorAuthAge” : “7200” } is the opposite of option C. This condition will allow access only if the time since the principal authenticated with MFA is more than 7200 seconds (2 hours), which is not the desired requirement.This condition key is supported by all AWS services that support IAM policies1.

Option E: “NumericLessThan” : { “MaxSessionDuration” : “7200” } is not a valid condition key. MaxSessionDuration is a property of an IAM role, not a condition key. It specifies the maximum session duration (in seconds) for the role, which can be between 3600 and 43200 seconds (1 to 12 hours).This property can be set when creating or modifying arole, but it cannot be used as a condition in a policy2.

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Overview.Encryption.html

https://aws.amazon.com/premiumsupport/knowledge-center/ebs-automatic-encryption/

To implement encryption at rest for both the EC2 instances and the Aurora DB cluster, the following steps are required:

For the EC2 instances, modify the EBS default encryption settings in the target AWS Region to enable encryption. This will ensure that any new EBS volumes created in that Region are encrypted by default using an AWS managed key. Alternatively, you can specify a customer managed key when creating new EBS volumes.For more information, see Amazon EBS encryption.

Use an Auto Scaling group instance refresh to replace the existing EC2 instances with new ones that have encrypted EBS volumes attached. An instance refresh is a feature that helps you update all instances in an Auto Scaling group in a rolling fashion without the need to manage the instance replacement process manually. For more information, see Replacing Auto Scaling instances based on an instance refresh.

For the Aurora DB cluster, create a new AWS Key Management Service (AWS KMS) encrypted DB cluster from a snapshot of the existing DB cluster. You can use either an AWS managed key or a customer managed key to encrypt the new DB cluster. You cannot enable or disable encryption for an existing DB cluster, so you have to create a new one from a snapshot.For more information, see Encrypting Amazon Aurora resources.

The other options are incorrect because they either do not enable encryption at rest for the resources (B, D), or they use the wrong service for encryption (E).

Verified References:

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSEncryption.html

https://docs.aws.amazon.com/autoscaling/ec2/userguide/asg-instance-refresh.html

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Overview.Encryption.html

For this scenario you would need to set up static website hosting because a custom domain name is listed as a requirement. "Amazon S3 website endpoints do not support HTTPS or access points. If you want to use HTTPS, you can use Amazon CloudFront to serve a static website hosted on Amazon S3." This is not secure. https://docs.aws.amazon.com/AmazonS3/latest/userguide/website-hosting-custom-domain-walkthrough.html CloudFront signed URLs allow much more fine-grained control as well as HTTPS access with custom domain names:https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-signed-urls.html

The correct answer is A and C.

When using ABAC, the principal’s identity-based policy and the S3 bucket’s resource policy are both evaluated to determine the effective permissions. If either policy grants access to the principal, the action is allowed. If either policy denies access to the principal, the action is denied. Therefore, to enforce the tag-based condition, both policies must deny access when the tag values do not match.

In this case, the principal’s identity-based policy grants access to put objects into the S3 bucket with no conditions (A), which means that the policy does not check for the tag values. This policy overrides the condition in the bucket policy because an explicit allow always takes precedence over an implicit deny. The bucket policy can only allow or deny actions to the principal based on the condition, but it cannot override the identity-based policy.

The S3 bucket’s resource policy does not deny access to put objects ©, which means that it also does not check for the tag values. The bucket policy can only allow or deny actions to the principal based on the condition, but it cannot override the identity-based policy.

Therefore, the combination of factors A and C are causing the PutObject operation to succeed when the tag values are different.