The Security Risk of Unmanaged Assets
Shadow IT refers to information technology systems, devices, software, applications, and services used by departments or individuals without explicit corporate approval or oversight.
How Subdomains Leak Shadow IT
Marketing, product, and sales teams often need to deploy micro-sites, landing pages, or customer portals quickly. They might register subdomains (e.g., promo.example.com) and point them to external SaaS platforms or cloud environments (like Heroku or AWS).
If these resources are deployed outside the central IT security pipeline, they often:
- Bypass corporate Web Application Firewalls (WAF).
- Lack basic access controls or credential rotation.
- Run outdated software versions vulnerable to exploitation.
Auditing for Shadow IT
Continuous subdomain discovery is the most effective way to identify shadow IT. By mapping CT logs and DNS records, security teams can catalog every active asset and verify it against their authorized database inventory.