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NEW QUESTION # 228
Hotspot Question
A company is developing an incident response process to quarantine Amazon EC2 hosts that become infected by malware. The company uses an organization in AWS Organizations to manage multiple AWS accounts. The company configures AWS Security Hub in the organization to receive findings from multiple accounts that run across multiple AWS Regions. A security engineer develops an AWS Lambda function to remove all the rules from all security groups for any EC2 instance the company suspects might be infected by malware.
Select and order the correct steps from the following list to deploy and use the Lambda function as a custom action in Security Hub. Select each step one time or not at all. (Select and order THREE.)
- Create a custom action that uses the Lambda function in Security Hub.
- Create and apply a filter set to the Amazon EventBridge rule in
Security Hub.
- Define a rule in Amazon EventBridge.
- Select the custom action in Security Hub for EC2 host findings.
- Select the custom action in Security Hub for security group findings.
Answer:
Explanation:
Explanation:
1. Create a custom action that uses the Lambda function in Security Hub.
2. Define a rule in Amazon EventBridge.
3. Select the custom action in Security Hub for EC2 host findings.
A custom action in Security Hub is first created to represent the remediation trigger. An EventBridge rule is then defined to listen for that specific custom action event and invoke the Lambda function. Finally, the custom action is manually executed on relevant EC2 findings in Security Hub to trigger the quarantine process.
NEW QUESTION # 229
A company's security engineer receives an abuse notification from AWS indicating that malware is being hosted from the company's AWS account. The security engineer discovers that an IAM user created a new Amazon S3 bucket without authorization.
Which combination of steps should the security engineer take to MINIMIZE the consequences of this compromise? (Select THREE.)
Answer: B,C,E
Explanation:
AWS incident response guidance emphasizes immediate containment, credential invalidation, and removal of malicious resources. According to the AWS Certified Security - Specialty documentation, compromised credentials must be rotated or deleted immediately to prevent further unauthorized actions. Rotating or deleting access keys directly mitigates ongoing abuse.
Deleting unrecognized or unauthorized resources, such as the malicious S3 bucket, removes the active threat and limits further damage. Enabling Amazon GuardDuty provides continuous monitoring and helps identify additional compromised resources or malicious behavior that may not yet be visible.
Changing passwords for all IAM users is disruptive and unnecessary if compromise scope is limited.
Encrypting CloudTrail logs does not reduce active impact. Taking EBS snapshots is primarily for forensic investigation, not immediate consequence minimization.
AWS best practices recommend GuardDuty activation, credential rotation, and removal of malicious resources as first-response actions.
Referenced AWS Specialty Documents:
AWS Certified Security - Specialty Official Study Guide
AWS Incident Response Best Practices
Amazon GuardDuty Threat Detection
NEW QUESTION # 230
CloudFormation stack deployments fail for some users due to permission inconsistencies. Which combination of steps will ensure consistent deployments MOST securely? (Select THREE.)
Answer: D,E,F
Explanation:
AWS best practices require CloudFormation to assume a dedicated service role. This ensures consistent permissions regardless of the user. Users must have iam:PassRole permission to pass the role. Updating stacks to use the service role enforces uniform deployment behavior.
NEW QUESTION # 231
A company needs to implement DNS Security Extensions (DNSSEC) for a specific subdomain. The subdomain is already registered with Amazon Route 53. A security engineer has enabled DNSSEC signing and has created a key-signing key (KSK). When the security engineer tries to test the configuration, the security engineer receives an error for a broken trust chain.
What should the security engineer do to resolve this error?
Answer: A
Explanation:
Comprehensive and Detailed 100to 150 words of Explanation From AWS Certified Security - Specialty topics:
DNSSEC validation depends on a chain of trust from the parent zone to the signed child zone. After enabling DNSSEC signing and creating a KSK for the subdomain, the parent zone must contain a Delegation Signer (DS) record that points to the child zone's DNSSEC key material. Without the DS record in the parent, validating resolvers cannot establish the trust chain, so the configuration appears broken. The DS record does not belong in the subdomain zone itself for this trust-linking purpose. Replacing the KSK with a ZSK is conceptually wrong because the KSK is the key associated with the DS record chain. Reactivating the KSK does not fix a missing parent-zone delegation signer record.
NEW QUESTION # 232
A company is running a new workload across accounts that are in an organization in AWS Organizations. All running resources must have a tag ofCostCenter, and the tag must have one of three approved values. The company must enforce this policy and must prevent any changes of the CostCenter tag to a non-approved value.
Which solution will meet these requirements?
Answer: C
Explanation:
Toenforcerequired tagging and approved values at scale, the strongest guardrail is anSCPbecause SCPs can prevent API calls across accounts/OUs before resources are created or tags are changed. By using the aws:RequestTag/CostCenter condition key and checking that the value is one of the approved values, an SCP candeny Create (and TagResource/UntagResource where supported)* when the request attempts to set a non- approved value. This prevents "bad" CostCenter values from being introduced.
NEW QUESTION # 233
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