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Amazon SCS-C03 Prüfungsplan:

ThemaEinzelheiten
Thema 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.
Thema 2
  • 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.
Thema 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.
Thema 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.

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Amazon SCS-C03 Prüfungsaufgaben - SCS-C03 Prüfungsunterlagen

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Amazon AWS Certified Security - Specialty SCS-C03 Prüfungsfragen mit Lösungen (Q186-Q191):

186. Frage
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?

Antwort: A

Begründung:
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.


187. Frage
A company's web application is hosted on Amazon EC2 instances running behind an Application Load Balancer (ALB) in an Auto Scaling group. An AWS WAF web ACL is associated with the ALB. AWS CloudTrail is enabled and stores logs in Amazon S3 and Amazon CloudWatch Logs.
The operations team has observed some EC2 instances reboot at random. After rebooting, all access logs on the instances have been deleted. During an investigation, the operations team found that each reboot happened just after a PHP error occurred on the new-user-creation.php file. The operations team needs to view log information to determine if the company is being attacked.
Which set of actions will identify the suspect attacker's IP address for future occurrences?

Antwort: C

Begründung:
AWS WAF logs capturedetailed request-level information, including source IP address, request URI, headers, and rule evaluation results. According to the AWS Certified Security - Specialty documentation, AWS WAF logging is acritical detection controlwhen application-level attacks are suspected, especially when host-based logs are unreliable or can be erased by attackers.
By configuring the AWS WAF web ACL to send logs toAmazon Data Firehose, the company ensures that all future requests are centrally captured and delivered to a durable storage service such as Amazon S3. Using Amazon Athena, the security team can query these logs to identify requests targeting specific application paths such as new-user-creation.php and extract the originating client IP addresses.
Option A is incorrect because VPC Flow Logs operate at the network layer and do not capture HTTP request paths. Option B is invalid because ALBs do not support CloudWatch agents. Option C is viable but introduces additional operational complexity and cost, making it less appropriate than the native WAF logging solution.
AWS documentation highlightsAWS WAF logging combined with Athenaas a best practice for forensic analysis and attacker identification.
* AWS Certified Security - Specialty Official Study Guide
* AWS WAF Logging Documentation
* Amazon Athena User Guide
* AWS Detection and Monitoring Best Practices


188. Frage
A company uses AWS Organizations. The company subscribes to AWS Shield Advanced. The company must share third-party firewall logs from all its accounts with the Shield Response Team. The company stores the logs in an Amazon S3 bucket that uses server-side encryption with S3 managed keys (SSE-S3).
Which combination of steps will meet these requirements? (Choose Two.)

Antwort: C,D

Begründung:
To let the Shield Response Team assist during DDoS events, the account must explicitly authorize SRT access. The associate-drt-log-bucket operation authorizes SRT access to an S3 bucket that contains log data, including third-party source logs. The SRT also needs an IAM role with the AWSShieldDRTAccessPolicy policy and a trust relationship for the Shield DRT service principal so it can inspect relevant protection and logging information during mitigation. Delegated administration and auto-enable can help manage Shield Advanced across accounts, but they do not by themselves share the specific third-party firewall log bucket with SRT. Security Hub CSPM is unrelated to SRT log-bucket access.


189. Frage
A security engineer received an Amazon GuardDuty alert indicating a finding involving the Amazon EC2 instance that hosts the company ' s primary website. The GuardDuty finding received read:
UnauthorizedAccess:IAMUser/InstanceCredentialExfiltration. The security engineer confirmed that a malicious actor used API access keys intended for the EC2 instance from a country where the company does not operate. The security engineer needs to deny access to the malicious actor.
What is the first step the security engineer should take?

Antwort: C

Begründung:
The findingInstanceCredentialExfiltrationindicates that credentials available to the EC2 instance (from the instance profile / IMDS) were likely stolen and then used from an unusual location. The fastest way todeny the malicious actor immediatelyis to invalidate the stolen, currently usable credentials. Because these aretemporary credentialsissued to the instance profile role, the correct first containment action is torevoke active sessionsfor that role so the stolen session credentials stop working. This directly blocks continued API use while you continue investigation and remediation.
Changing security groups (Option A) affects inbound network access to the website but does not stop an attacker from using stolen API credentials against AWS APIs. Installing agents and running assessments (Options B and C) are investigative steps that take time and do not immediately cut off the attacker's current access. After revoking sessions, best practice incident response typically continues with additional containment and eradication steps such as rotating credentials, reviewing CloudTrail for actions taken, checking for persistence (new IAM users/keys, modified policies), patching the instance, and restricting IMDS (for example, enforcing IMDSv2) to reduce risk of further credential theft.


190. Frage
A company has an organization with all features enabled in AWS Organizations. In the management account, the company configures AWS IAM Identity Center for the organization in the eu-west-2 Region. The company configures IAM Identity Center with a SAML-based identity provider.
The company needs to configure an AWS managed application that integrates with IAM Identity Center in a new AWS account in the us-east-1 Region. Most of the users that will authenticate to the AWS managed application are external third-party users who cannot be added to the company's identity provider.
A security engineer needs to configure authentication for the third-party users. The solution must provide isolation from the company's identity provider.
Which solution will meet these requirements?

Antwort: C

Begründung:
IAM Identity Center account instances are designed for isolated deployments of supported AWS managed applications in a single AWS account. AWS documentation states that account instances should be used for isolated users who need applications in one account, and they remain bound to the account in which they are created. This matches the requirement:
third-party users cannot be added to the company's main IdP, and access must be isolated from the organization-level IAM Identity Center identity source. Amazon Cognito identity pools do not configure authentication for IAM Identity Center integrated AWS managed applications in this pattern. IAM SAML roles in the management account would not isolate the application account cleanly. IAM Identity Center supports one identity source per instance, so adding a second identity source to the organization instance is not the right design.


191. Frage
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