Azure Suspicious Automation DSC Execution

Triggers

• Unusual changes to VM configuration or Hybrid Environment using Azure Automation Account with DSC (Desired State Configuration).
• Modification of existing DSC configurations with unusual parameters or logic.
• Unusual creation or modification of DSC resources by an unexpected or unauthorized user/service principal.
• Possible misuse of DSC for malicious purposes, such as lateral movement or privilege escalation.

Possible Root Causes

• The VM or hybrid machine has been compromised by an attacker who is using DSC to maintain persistence and evade detection.
• DSC has been misconfigured by a user, leading to unintended behavior and potential security issues.
• An unauthorized user or service principal has gained access to the Azure environment and is using DSC for malicious purposes.
• Automated deployment scripts not previously used are updating the DSC configurations.

Business Impact

• Exposure of sensitive data through unauthorized access or data leaks
• Security vulnerabilities exploited due to misconfigured resources or DSC configurations
• Unplanned changes to business logic or workflows
• Potential data breaches, unauthorized access to resources, disruption of critical business services, and reputational damage

Steps to Verify

• Review Azure Activity Logs: Investigate the user/service principal and the affected VM for suspicious activity.
• Audit DSC Configurations for Azure Automation Accounts: Review the DSC configurations for unusual changes or modifications. To view the DSC service:
  - Navigate to the 'Automation Accounts' service in Azure.
  - Identity the Automation Account associated to the DSC service.
  - DSC can be found under the 'Configuration Management' tab for the selected Automation Account.
• Check Network Traffic: Examine network traffic to and from the VM to detect any potential lateral movement or communication with malicious actors.
• Conduct a Security Audit: Perform a thorough security audit of the affected VM and its resources to identify any vulnerabilities or misconfigurations.
• Consult with Azure Administrators: Work with Azure administrators, security teams, and relevant stakeholders to determine the cause and scope of the incident.