How Attackers Exploit Non-Human Identities (NHIs) — 5 Patterns You Must Defend Against

Read full article here: https://aembit.io/blog/5-common-ways-non-human-identities-are-exploited-and-how-to-secure-them/?source=nhimg

Non-human identities (NHIs)— service accounts, automation scripts, bots, API keys and AI agents — have become the new operational backbone of modern infrastructure, vastly outnumbering human users. Yet, in many organizations, these machine identities are poorly governed, loosely monitored, and frequently over-permissioned, creating a growing and largely invisible attack surface.

Attackers are capitalizing on this oversight. From token abuse and credential exposure to orphaned service accounts and legacy credential harvesting, NHIs are now a primary target in modern breach campaigns. As automation and AI adoption accelerate, the risks associated with unmanaged NHIs will only intensify.

This article outlines 5 common exploitation techniques targeting NHIs and provides actionable strategies for mitigating each:

1. Token Abuse — Attackers steal, replay, or forge access tokens that lack context-aware restrictions, bypassing detection and gaining unauthorized access.

2. Living-off-the-Land with Compromised NHIs — Adversaries exploit legitimate NHI credentials to blend into normal workload activity, enabling stealthy lateral movement.

3. Credential Exposure — Hardcoded secrets, plaintext environment variables, and leaked credentials in logs continue to fuel breaches due to poor implementation hygiene.

4. Orphaned and Overprivileged NHIs — Forgotten service accounts and excessive permissions provide attackers with persistent footholds and expansive access.

5. Credential Harvesting via Legacy Accounts — Techniques like Kerberoasting remain effective against organizations relying on static passwords for service accounts in hybrid AD environments.

To combat these threats, organizations must adopt an identity-first approach to workload security — emphasizing NHI visibility, contextual access controls, dynamic credential issuance, and rigorous lifecycle management. By reducing the lifespan, scope, and persistence of non-human access, security teams can drastically minimize the opportunities for exploitation.

Bottom Line

Securing NHIs is no longer optional. As non-human identities become the dominant actors in enterprise environments, proactive governance and control over their access will be essential to staying ahead of modern attack patterns.