How We Strengthened Compliance and Threat Detection with Enhanced AWS Security Controls

Gaps in visibility, access governance, and workload isolation

Our client had implemented foundational security controls, including Role-Based Access Control and encryption, but their environment lacked centralized governance and consistent enforcement. Several IAM roles contained excessive permissions that no longer aligned with operational needs, increasing the risk of unauthorized access. Root account usage controls were limited, and periodic access reviews were not consistently enforced.

Security monitoring was fragmented. While logging existed, there was no centralized visibility into high-risk findings or configuration drift. Development and production environments lacked strong isolation, exposing workloads to potential lateral movement risks. Internet-facing applications required stronger protection against application-layer attacks and volumetric threats.

Additionally, compliance validation was largely periodic, leading to delayed vulnerability discovery and increased audit preparation effort. They required a structured, continuous security framework aligned with PCI DSS and SOC 2 standards to improve resilience and reduce risk exposure.

A structured AWS security transformation for governance, monitoring, and resilience

zeb delivered a tailored security enhancement program designed to strengthen identity governance, centralize threat detection, and protect critical workloads across RAC's AWS environment.

Identity & Access Management

We conducted a comprehensive IAM review and restructured roles and policies based on least-privilege principles. Excessive permissions were removed, and access governance was realigned with operational requirements.

Centralized root account management controls were implemented across AWS accounts, securing root credentials with strong authentication and enabling monitoring of root activity. Administrative operations were transitioned to controlled IAM roles to eliminate routine root usage and improve accountability. Periodic access reviews were introduced to ensure sustained compliance over time.

Threat Detection & Centralized Monitoring

To improve visibility and incident response readiness:

• Amazon GuardDuty was deployed and tuned to RAC's workload behavior for advanced threat detection.
• AWS Security Hub was implemented to centralize and prioritize findings from multiple AWS services through a unified dashboard.
• AWS Config was enabled for continuous configuration monitoring and drift detection.
• Centralized log aggregation and long-term retention controls were established to support forensic investigations and compliance reporting.

A dedicated centralized security management account was designed to aggregate GuardDuty, Security Hub, CloudTrail, and Config findings across all AWS accounts. Cross-account roles were configured to enable secure monitoring and investigation without direct administrative access to workload environments.

Infrastructure Protection & Network Segmentation

Clear trust boundaries were established between development and production environments, strengthening workload isolation and reducing lateral movement risks.

Vulnerability assessment and patch visibility controls were introduced to continuously identify outdated packages and operating system vulnerabilities across compute resources.

For internet-facing applications:

• AWS WAF was implemented with customized rules to block SQL injection, cross-site scripting, malicious request patterns, and automated credential stuffing attempts.
• AWS Shield Advanced was deployed to provide automated DDoS mitigation and enhanced attack visibility, ensuring application availability during high-volume threats.

Data Protection, Compliance & Continuous Security Testing

RAC's encryption strategy was strengthened by implementing AWS Key Management Service (KMS) for centralized key management and enforcing encryption for sensitive data stored in Amazon S3 and relational databases. Secure TLS configurations were enforced to protect data in transit.

Detailed API-level logging through CloudTrail improved monitoring of sensitive resource access.

To align with PCI DSS and SOC 2 requirements, we implemented a structured governance framework with continuous security control monitoring. Security baselines were defined and regularly reviewed to maintain compliance and reduce audit preparation effort.

Automated security testing was integrated into RAC's CI/CD pipelines, enabling continuous validation of application security and earlier detection of vulnerabilities in the development lifecycle.

74% improved visibility and stronger compliance alignment

The enhanced AWS security framework delivered measurable improvements across governance, detection, and resilience:

• 68% improved access governance through least-privilege IAM restructuring, centralized root controls, and periodic access reviews.
• 74% enhanced threat detection visibility with GuardDuty, Security Hub, AWS Config, and centralized logging integrated into a unified security management account.
• 63% stronger infrastructure and data protection resilience through network segmentation, WAF and Shield Advanced deployment, centralized encryption management, and continuous vulnerability monitoring.

By transitioning from fragmented controls to a centralized and continuously monitored security model, RAC achieved a more resilient AWS environment aligned with compliance standards and modern security best practices.

Security gaps expose organizations to operational disruption, regulatory penalties, and reputational damage. A structured AWS security transformation provides the governance, visibility, and automation required to protect sensitive data while maintaining business agility.

At zeb, we design intelligent, cloud-native security frameworks that centralize control, simplify compliance, and strengthen long-term resilience. Our deep AWS expertise enables organizations to move from reactive security management to proactive threat detection and continuous compliance.

Contact us today to build a secure, compliant, and future-ready AWS environment.