Cloud Security Program for a Regional Bank
A regional bank migrating workloads to AWS needed to establish a cloud security baseline before expanding the program. Mitigence delivered an assessment, architecture design, and engineering engagement over 16 weeks.
Challenge
The bank's cloud environment had grown organically across three years without a formal security architecture. Over 40% of S3 buckets had public access enabled. IAM permissions were broadly scoped and unused accounts remained active from previous projects.
Approach
Mitigence conducted a full cloud security assessment against CIS AWS Foundations Benchmark, produced a prioritized remediation plan, redesigned the IAM architecture, implemented a landing zone with guardrails, and enabled AWS Security Hub with custom detection rules.
Timeline
16 weeks
Outcomes
- 100% of public S3 bucket access removed within first 4 weeks
- IAM privilege reduced by 68% through role consolidation
- AWS Security Hub enabled with 94% CIS compliance score
- Detection coverage increased from 12 to 47 MITRE ATT&CK techniques
Continuous Improvement
The bank retained Mitigence for quarterly cloud security reviews and ongoing detection rule updates as the environment evolves.