Why does lateral movement remain so damaging in modern networks?

Why This Matters for Security Teams

lateral movement stays damaging because initial compromise is only the opening move. Once an attacker reaches a valid internal identity, the network’s own trust fabric can do the rest: service accounts, delegated admin paths, cached tokens, and overbroad roles turn one foothold into many. NIST SP 800-207 Zero Trust Architecture is explicit that internal location should not imply trust, yet many environments still behave as if it does.

That is why NHI compromise is so often a force multiplier. A stolen token, API key, or cloud access path can be reused far beyond the original host, especially when secrets are long-lived and telemetry is fragmented. NHIMG’s 52 NHI Breaches Analysis shows how frequently identity abuse, not malware alone, becomes the real business impact. In practice, many security teams encounter lateral movement only after a privileged session, backup system, or cloud control plane has already been traversed.

How It Works in Practice

Attackers usually do not need sophisticated exploits to move laterally. They look for authenticated paths that already exist, such as remote management, shared admin groups, inherited cloud permissions, and secrets left in scripts or CI/CD systems. The MITRE ATT&CK Enterprise Matrix captures this as a chain of techniques: credential access, discovery, remote services, and privilege escalation. The damage comes from the speed and legitimacy of each step.

For NHI-heavy environments, the problem is even sharper. Non-human identities often have broader access than humans because they are built for automation, not for containment. If a service account can read another secret, assume a role, or call an internal API, the attacker inherits that path once the credential is exposed. NHIMG’s TruffleNet BEC Attack — Stolen AWS Credentials illustrates how stolen cloud credentials can support fast-scale abuse, while Storm-2949 Azure Breach shows how a single identity can become a broader cloud incident when trust is too expansive.

• Shorten token, session, and secret lifetime so reuse is harder after compromise.
• Segment internal access so one identity cannot freely traverse every admin plane.
• Use explicit authorization checks for sensitive actions rather than relying on network location.
• Monitor for abnormal east-west behavior, especially cross-domain access and unusual tool chaining.

Current guidance suggests that zero trust, least privilege, and strong identity telemetry must be applied together, not as separate programs. These controls tend to break down in legacy flat networks, shared jump-host environments, and hybrid estates where cloud, on-prem, and CI/CD identities are managed inconsistently because attackers can pivot through the least governed path.

Common Variations and Edge Cases

Tighter segmentation often increases operational overhead, requiring organisations to balance containment against admin friction and application complexity. That tradeoff is real, especially where older systems depend on broad trust or where automation jobs must reach many internal endpoints.

There is no universal standard for every environment, but current guidance suggests focusing first on identities that can fan out widely: domain admins, CI/CD secrets, cloud roles, backup operators, and machine accounts. If those paths are protected, lateral movement becomes slower and more visible. If they are left static, attackers can bypass endpoint controls by moving through legitimate sessions. For teams managing AI-driven or heavily automated estates, NHIMG’s DeepSeek breach is a reminder that exposed secrets and overtrusted internal pathways often compound each other.

The hardest cases are environments with shared credentials, embedded service secrets, or brittle legacy tooling where revocation is manual. In those settings, containment fails because the identity itself is the route. The practical goal is not perfect prevention, but shrinking the set of identities that can move laterally without immediate detection.

Related resources from NHI Mgmt Group

• How should security teams reduce lateral movement risk in enterprise networks?
• Why do perimeter VPNs increase lateral movement risk in enterprise networks?
• Why do segmentation controls often fail against modern lateral movement?
• Why do shared VPNs and jump boxes increase lateral movement risk in OT networks?