Add check: Key Vaults have soft-delete and purge protection enabled (#35041)

[krishna-sunkavalli]

Summary

Adds a new Azure Network Security check (Test ID: 35041) that validates all Azure Key Vaults have soft-delete and purge protection enabled.

Details

Attribute	Value
Test ID	35041
Pillar	Network
Category	Azure Network Security
Risk Level	High
Implementation Cost	Low
User Impact	Low

What it checks

Uses Azure Resource Graph to query all Key Vaults across subscriptions and verifies:

• Soft-delete is enabled (prevents permanent deletion)
• Purge protection is enabled (prevents force-purge during retention period)

Report output

Generates a per-vault compliance table with:

• Vault name (linked to Azure Portal)
• Subscription name
• Soft-delete status
• Purge protection status
• Retention period (days)
• Overall compliance status

Files added

• \src/powershell/tests/Test-Assessment.35041.ps1\ - Assessment logic
• \src/powershell/tests/Test-Assessment.35041.md\ - Remediation guidance with Azure CLI/PowerShell commands and Microsoft Learn links

Why this matters

Without soft-delete and purge protection, accidental or malicious deletion of Key Vaults results in permanent, irrecoverable loss of cryptographic keys, certificates, and secrets - potentially causing widespread service outages.

Motivation

This check was adapted from an independent Azure security posture assessment tool covering gaps not currently addressed by the Zero Trust Assessment. The ARG query and assessment logic have been converted to follow the official test format ([ZtTest()]\ attribute, \Invoke-ZtAzureResourceGraphRequest, markdown report generation, companion .md\ remediation file).

---

• Follows one-function-per-file convention
• Includes [ZtTest()]\ attribute with all required metadata
• Companion .md\ file with %TestResult%\ placeholder
• No trailing whitespace
• No syntax errors
• Uses \Invoke-ZtAzureResourceGraphRequest\ for ARG queries
• Handles skip scenarios (NotConnectedAzure, NotSupported, NotApplicable)

[krishna-sunkavalli]

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