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Step-by-Step Cloud Security Audit Preparation Guide

If you are new to cloud security audit, here’s everything you need to know:

Inventory and Asset Visibility

• Create a complete inventory of all cloud and on‑premise assets to gain full visibility. 
• In multi‑cloud or hybrid networks, resources such as VMs, containers, databases, storage, and network devices are spread across platforms. 
• Use native tools like AWS Config, Azure Resource Graph, GCP Asset Inventory, to auto‑discover them or take help from CERT-In Empanelled Security Auditors to help you from start to finish.
• Record details like owner, classification, region, and vulnerabilities.
• Update this inventory regularly as environments change quickly.

Reason: Full asset visibility prevents shadow IT, ensures audit scope is complete, and links assets to relevant controls and compliance needs.

Align with Regulatory Compliance Requirements

• Identify and document all regulations, standards, and frameworks relevant to your cloud environment. These include laws like GDPR, industry rules like HIPAA or PCI DSS, and frameworks such as ISO 27001, SOC 2, or NIST SP 800‑53. 
• Understand the shared responsibility model used by cloud providers to secure the infrastructure, while you configure and use services compliantly. 
• Align internal policies with these requirements and use frameworks like CIS Controls or the NIST Cybersecurity Framework as checklists. 

Reason: Mapping assets and processes to regulations creates a clear audit matrix, ensures compliance, and prevents audit surprises.

Leverage CSPM Tools for Real-time Monitoring and Compliance

• Cloud Security Posture Management (CSPM) tools help prepare for multi‑cloud audits by continuously checking cloud configurations against best practices and mapping vulnerabilities against compliance policies in real-time.
• CSPM with AI-powered platforms like AutoSecT give a unified view across AWS, Azure, GCP, and on‑prem resources, flag misconfigurations, enforce consistent policies, and include built-in checks for standards like ISO 27001, SOC 2 and NIST SP 800-53.
• CSPM automates evidence gathering and compliance reporting, reduces manual work, and provides real‑time alerts to improve incident response. 

Reason: AutoSecT enables continuous audit readiness across cloud providers like AWS, Azure and GCP preventing last‑minute scrambling.

Strengthen Identity and Access Management (IAM) Controls

• Strong Identity and Access Management (IAM) is essential for cloud security audits. 
• In multi‑cloud or hybrid setups, manage identities across AWS IAM, Azure AD, Google IAM, and on‑prem directories. 
• Enforce least privilege by removing unused accounts and limiting permissions. 
• Require MFA for all privileged access to add an extra security layer. 
• Centralize identity management with unified directories or SSO for consistent control. 
• Regularly audit IAM policies and logs using tools like access analyzers or CIEM solutions to find misconfigurations or inactive accounts. 
• Document user roles and mappings to business functions to show proper governance. 

Reason: Tight IAM controls reduce risks from stolen credentials or insider threats and demonstrate readiness during audits.

Implement Comprehensive Logging and Monitoring

• Enable centralized logging across all cloud and on-prem systems using tools like SIEM. 
• Collect key logs from cloud platforms, OS, apps, firewalls, and IDS.
• Monitor continuously with alerts for suspicious activity using tools like AutoSecT. 
• Keep logs securely for compliance periods with tamper-proof storage. 
• Regularly review logs and use automated detection tools. 

Reason: Unified logging across multi-cloud setups ensures clear audit trails and fast issue detection.

Ensure Data Classification and Encryption for Cloud Security Audit

• Classify your data across all environments to identify sensitive, regulated, or mission-critical information like PII, financial, and health data. 
• Encrypt sensitive data at rest with strong algorithms and manage keys securely using cloud-native services like AWS KMS or Azure Key Vault. 
• Ensure encryption in transit with TLS and secure links between on-prem and cloud. 
• Enforce data loss prevention (DLP) and governance policies to control where and how data is stored or transmitted. 
• Use strict access controls through granular IAM policies and monitoring to limit data access to authorized users only. 
• Implement backup and recovery processes that meet encryption and location regulations. 

Reason: These measures demonstrate strong data protection, reducing risk from misconfigurations and ensuring compliance during audits

Verify Incident Response Readiness

• To be prepared for cloud security incidents, develop a detailed incident response plan covering detection, containment, eradication, and recovery, tailored for multi-cloud and hybrid environments. 
• This plan should include contact information for cloud providers, log retrieval procedures, and communication strategies across teams. 
• Regular penetration testing through simulations or drills is essential, with documentation of these exercises as evidence for audits. 
• Additionally, compile an incident evidence kit with tools for forensic analysis, like logs and snapshots, and clearly define roles and communication channels for all involved teams

Prepare Documentation and Evidence for Cloud Security Audit

For a smooth cloud security audit, start early by gathering and organizing essential documents and evidence:

• Keep all cloud security policies updated and approved.
• Have current diagrams showing cloud and on-prem connections with security controls marked.
• Maintain hardened configuration records and Infrastructure as Code scripts as evidence.
• Retain past audit reports and show how issues were fixed.
• Collect results from vulnerability scans and penetration tests.
• Document staff training on security and cloud practices.
• Provide mappings of controls to regulations and a cloud risk register if available.
• Gather proof that controls work, like screenshots of encryption settings, IAM policies, logs, and reports from security tools. 

Cloud Security Audit Readiness Checklist

FAQs

The post How to Prepare for a Cloud Security Audit in Multi-Cloud and Hybrid Networks appeared first on Kratikal Blogs.

*** This is a Security Bloggers Network syndicated blog from Kratikal Blogs authored by Puja Saikia. Read the original post at: https://kratikal.com/blog/how-to-prepare-for-a-cloud-security-audit-in-multi-cloud-and-hybrid-networks/