Securing Non-Human Identities: Preventing Orphaned API Key Exploits

According to The Hacker News, unmanaged non-human identities (NHIs) have become the primary vector for cloud security incidents. In 2024, compromised service accounts and forgotten API keys were implicated in 68% of cloud breaches. This data suggests that traditional threat vectors like Phishing or weak passwords are being eclipsed by the massive, unmonitored footprint of automated credentials.

For every human user in a typical organization, there are between 40 and 50 NHIs. These identities encompass a variety of automated assets, including service accounts, API tokens, OAuth grants, and connections for AI agents. This high ratio creates an expansive attack surface that often remains invisible to traditional SOC monitoring tools. Unlike human users, NHIs rarely utilize multi-factor authentication (MFA) and frequently possess static credentials that do not expire, making them ideal targets for maintaining persistence and facilitating Lateral Movement.

The Lifecycle Problem: Identifying Orphaned Credentials

A significant portion of the NHI risk profile stems from “orphaned” identities. These are credentials created for specific projects, temporary integrations, or by employees who have since left the organization. When a project concludes or a developer departs, the associated API tokens and service accounts often remain active because there is no automated process to de-provision them. This lack of lifecycle management allows attackers to exploit forgotten access points that defenders are no longer watching.

How to Detect Orphaned API Keys and Service Accounts

To effectively mitigate this risk, security teams must move beyond static inventory spreadsheets. Detecting these identities requires a combination of log analysis and behavioral monitoring. Organizations should audit cloud provider logs to identify credentials that have not been utilized for 30, 60, or 90 days. However, simple inactivity is not the only indicator of an orphaned state. High-risk identities might also exhibit anomalies in geographic origin or API call patterns, which should be flagged by a SIEM or a specialized identity security platform.

Integrating identity-centric TTP detection into existing security stacks is essential. For instance, if a service account previously restricted to a specific microservice suddenly attempts to access sensitive storage buckets or administrative functions, this should trigger an immediate alert for investigation by the EDR or identity team. This level of visibility is a core component of a Zero Trust architecture, where no identity—human or machine—is trusted by default.

Non-Human Identity Management Best Practices

Security professionals must transition from reactive remediation to proactive lifecycle management. This involves establishing clear ownership for every NHI created. When an identity is generated, it should be associated with a specific application owner or team to ensure accountability.

Implementation of Automated Rotation and Least Privilege

1. Automated Rotation: Implement secrets management solutions that automatically rotate API keys and tokens at regular intervals. This reduces the window of opportunity for an attacker if a key is leaked.
2. Least Privilege: Ensure NHIs are granted only the minimum permissions necessary for their specific function. A service account used for logging should never have permissions to modify IAM roles or delete databases.
3. Inventory and Discovery: Use automated discovery tools to map the entire NHI landscape. This helps in identifying “shadow IT” integrations and OAuth grants that were authorized by users without SOC oversight.

By focusing on these areas, defenders can address the 68% of cloud breaches that stem from unmanaged machine identities. The goal is to ensure that every machine-to-machine connection is accounted for, monitored, and decommissioned the moment it is no longer required.