ScoutSuite — Multi-Cloud Security Auditing Tool

Introduction

ScoutSuite is a security auditing tool created by NCC Group that performs automated configuration reviews of cloud environments. It gathers data from cloud provider APIs and evaluates it against a comprehensive set of security rules, generating an interactive HTML report that highlights misconfigurations, overly permissive policies, and security gaps across your infrastructure.

What ScoutSuite Does

• Scans AWS, Azure, GCP, Alibaba Cloud, Oracle Cloud, and Kubernetes configurations
• Evaluates hundreds of security rules covering IAM, networking, storage, logging, and encryption
• Generates an interactive HTML report with findings categorized by severity
• Supports custom rule definitions for organization-specific compliance requirements
• Runs without requiring any agents or infrastructure changes in target environments

Architecture Overview

ScoutSuite is written in Python and interacts with cloud provider APIs using read-only credentials. During a scan, it enumerates resources across configured services and regions, building a JSON data model of the environment. The rule engine then evaluates this data against a library of predefined rules written in JSON. Results are compiled into a self-contained HTML report using JavaScript for interactive filtering and drill-down. The entire scan runs locally on the operator's machine.

Self-Hosting & Configuration

• Install via pip in a virtualenv: pip install scoutsuite
• Configure cloud credentials using each provider's standard authentication (AWS profiles, Azure CLI, GCP service accounts)
• Limit scan scope with --regions and --services flags to reduce runtime
• Export results as JSON for integration with SIEM or ticketing systems
• Schedule periodic scans via cron or CI pipelines for continuous monitoring

Key Features

• Supports six major cloud providers plus Kubernetes from a single tool
• Hundreds of built-in security rules mapped to CIS benchmarks and provider best practices
• Offline HTML report requiring no server for viewing and sharing
• Custom rule engine allowing organization-specific security policies
• Read-only scanning that never modifies target environments

Comparison with Similar Tools

• Prowler — AWS and Azure focused with CLI-first output; ScoutSuite covers more providers with richer HTML reports
• CloudSploit — similar multi-cloud scanner, now part of Aqua Security's commercial offering
• Steampipe — SQL-based cloud querying tool for ad-hoc analysis rather than rule-based auditing
• Checkov — focuses on Infrastructure-as-Code scanning rather than live environment auditing
• AWS Security Hub — AWS-only managed service with native integration but vendor lock-in

FAQ

Q: Does ScoutSuite need write permissions to scan? A: No. ScoutSuite only requires read-only API access. It never creates, modifies, or deletes any cloud resources during a scan.

Q: How long does a full AWS scan take? A: Scan time depends on the number of resources and services. A typical medium-sized AWS account completes in 10-30 minutes.

Q: Can I run ScoutSuite in CI/CD? A: Yes. ScoutSuite can run headlessly and output JSON results for automated compliance gates in CI pipelines.

Q: Does it support custom compliance frameworks? A: Yes. You can define custom rulesets in JSON format to match your organization's security policies and compliance requirements.

Sources

• https://github.com/nccgroup/ScoutSuite
• https://github.com/nccgroup/ScoutSuite/wiki