PowerZure: When Your Azure Credentials Become Someone Else's Attack Surface

Hook

Every Azure API call looks legitimate to Microsoft's logs—which is exactly what makes PowerZure dangerous. This PowerShell framework doesn't break into Azure; it walks through the front door with your credentials.

Context

Cloud security has always grappled with a fundamental asymmetry: defenders must secure thousands of resources and configurations, while attackers only need to find one misconfigured role assignment or one over-privileged service principal. Traditional penetration testing tools evolved for on-premises networks, focusing on network scanning, vulnerability exploitation, and privilege escalation through OS-level bugs. But Azure and other cloud platforms operate on entirely different trust models—identity is the perimeter, API calls replace network packets, and a single compromised credential can pivot across dozens of subscriptions.

PowerZure emerged from this gap. Created by security researcher Ryan Hausec, it recognizes a crucial insight: once an attacker obtains valid Azure credentials (through phishing, credential stuffing, or lateral movement), the subsequent attack chain happens entirely within legitimate API boundaries. You don't exploit buffer overflows or SQL injection in Azure Resource Manager—you exploit IAM misconfigurations, overly permissive RBAC roles, and trust relationships between resources. PowerZure packages these post-compromise techniques into a unified PowerShell framework, giving red teams and penetration testers a structured way to assess what an adversary could accomplish with compromised credentials.

Technical Insight

PowerZure's architecture is deceptively straightforward: it's a collection of PowerShell cmdlets built directly on Microsoft's official Az PowerShell module. This design choice is brilliant from both operational and evasion perspectives. By leveraging Az commands under the hood, every PowerZure operation translates to standard Azure REST API calls—the same calls that legitimate administrators make daily. There's no signature to detect, no anomalous protocol behavior, just authenticated API requests within the scope of the credential's permissions.

The framework organizes its capabilities into logical categories mirroring the attack lifecycle. Operational reconnaissance starts with cmdlets like Get-AzureCurrentUser and Get-AzureTarget, which enumerate the current security context:

# Import the framework
Import-Module .\PowerZure.psd1

# Discover current user context and permissions
Get-AzureCurrentUser

# Output reveals:
# - Current subscription and tenant
# - Role assignments across subscriptions
# - Service principal details if using app-based auth
# - Group memberships that might grant additional access

# Enumerate specific resources as potential targets
Get-AzureTarget -VM
Get-AzureTarget -StorageAccount
Get-AzureTarget -KeyVault

These reconnaissance functions parse Azure's RBAC model to answer the attacker's fundamental question: "What can I reach from here?" Unlike defensive security scanners that check for misconfigurations against a compliance baseline, PowerZure thinks adversarially—it identifies privilege escalation paths and lateral movement opportunities.

The framework's offensive capabilities get more sophisticated when targeting specific Azure services. Consider the storage account exfiltration workflow. In Azure, storage accounts often contain sensitive data but are protected by access keys and potentially network restrictions. PowerZure provides Get-AzureStorageAccountKeys to extract these keys if the compromised credential has sufficient permissions:

# Identify storage accounts in scope
$targets = Get-AzureTarget -StorageAccount

# Attempt to retrieve access keys
foreach ($account in $targets) {
    $keys = Get-AzureStorageAccountKeys -StorageAccountName $account.Name
    if ($keys) {
        Write-Host "[+] Retrieved keys for $($account.Name)"
        # Keys can now be used with Azure Storage Explorer or Az.Storage
        # for complete data access
    }
}

The elegance here is that PowerZure doesn't need to "hack" anything—if your credential has the Microsoft.Storage/storageAccounts/listkeys/action permission (commonly granted through Contributor or custom roles), the operation succeeds through normal API authorization. The framework simply automates the discovery and exploitation of these permissions.

PowerZure also includes capabilities for persistence and privilege escalation. The New-AzureBackdoor cmdlet creates persistent access mechanisms by adding credentials to existing service principals or creating new ones with inherited permissions. Similarly, Set-AzureRole can modify RBAC assignments if the credential has appropriate Microsoft.Authorization/* permissions, potentially escalating privileges or establishing alternative access paths.

The framework's session management deserves attention. PowerZure operates within Azure PowerShell's existing authentication context, meaning you must establish an authenticated session before using the framework:

# Authenticate with compromised credentials
Connect-AzAccount -Credential $cred

# Or use device code flow for phishing scenarios
Connect-AzAccount -UseDeviceAuthentication

# Set subscription context (critical for multi-tenant scenarios)
Set-AzContext -Subscription "Production-Subscription"

# Now PowerZure operates within this authenticated context
Import-Module PowerZure

This dependency on existing authentication means PowerZure excels at post-compromise scenarios but can't help with initial access. It's explicitly designed for the "assume breach" model that modern red teams employ—what happens after credentials are compromised, not how to obtain them initially.

Gotcha

PowerZure's primary limitation is architectural: it's fundamentally bound by the permissions of the credentials you've compromised. If your foothold is a reader-only service principal, PowerZure can't magically escalate you to Owner—it operates within Azure's authorization boundaries. This isn't a vulnerability in the tool; it's the reality of cloud IAM. Unlike on-premises privilege escalation where kernel exploits or misconfured SUID binaries might bypass permissions, Azure's authorization happens server-side at the API gateway. Every request is validated against RBAC policies before execution. PowerZure can help you discover what you can do with your current permissions and identify misconfigurations that enable lateral movement, but it won't break Azure's authorization model.

The multi-subscription challenge creates operational friction. Azure environments frequently span dozens of subscriptions, but PowerZure requires explicit subscription context switching using Set-AzContext or the framework's Set-AzureSubscription wrapper. If you don't switch contexts, operations targeting resources in other subscriptions will silently fail or return incomplete results. This creates a tedious workflow in complex environments where you must iterate through subscriptions, test permissions, and track results manually. There's also the detection consideration: while PowerZure's API calls are legitimate, the pattern of access—rapidly enumerating resources across multiple services, retrieving storage keys, querying KeyVault secrets—can trigger behavioral analytics in mature SOC environments using tools like Microsoft Sentinel or third-party CASB solutions. The tool's strength (using official APIs) becomes a weakness against sophisticated defenders who monitor for anomalous API usage patterns rather than just signatures.

Verdict

Use PowerZure if you're conducting authorized penetration tests or red team exercises against Azure environments where you need to demonstrate real-world post-compromise attack chains. It's particularly valuable when you need to quickly assess what an adversary could accomplish with specific credentials, map privilege escalation paths, or provide concrete evidence of over-permissioned roles to stakeholders who don't understand cloud IAM abstractions. The framework excels at translating "this service principal has Contributor on three subscriptions" into tangible impact demonstrations. Skip it if you're performing defensive security assessments, compliance scanning, or general Azure security posture evaluation—tools like ScoutSuite or Prowler are purpose-built for those use cases. Also skip if you don't have explicit written authorization for offensive testing; PowerZure's capabilities cross the line from reconnaissance to active exploitation, and unauthorized use violates both Azure's terms of service and computer fraud laws in most jurisdictions. Finally, if you're primarily concerned with EntraID (Azure AD) attack paths and relationship mapping, start with AzureHound for visualization before incorporating PowerZure for exploitation workflows.