CISA Urges Organizations to Deploy Cyber Decoys to Detect Hackers Inside Networks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has urged organizations to deploy cyber decoys, which include fake credentials, systems, data, and services. This strategy aims to expose attackers sooner and enhance post-compromise detection.

In new guidance titled “Using Cyber Decoys to Strengthen Detection and Response,” published on September 16, 2026, CISA outlined how defenders can use deception technology to identify adversaries who exploit stolen legitimate accounts, built-in administrative utilities, and living-off-the-land (LOTL) techniques.

CISA Urges Organizations to Deploy Cyber Decoys

Cyber decoys are intentionally deployed assets that appear legitimate to intruders but serve no real business purpose. They can distract threat actors, generate high-confidence alerts when accessed, or collect threat intelligence on attacker behavior.

CISA emphasized the value of this approach, as many organizations struggle to detect attackers who bypass malware and instead use valid credentials, native operating system tools, and existing remote management capabilities to conduct reconnaissance, move laterally, and access sensitive information.

The guidance describes several decoy concepts. “Tripwires” are signals or conditions that trigger alerts when attackers interact with protected areas or assets.

“Breadcrumbs” are planted clues, such as references in scripts, documentation, file shares, or configuration files, that guide an intruder toward a monitored decoy resource.

“Honeytokens” include fake usernames, passwords, API keys, documents, database records, cloud access tokens, and other artifacts that should never be used during normal business operations. Any authentication attempt or access involving these assets can thus provide a high-fidelity indication of suspicious activity.

CISA recommends that defenders begin with low-complexity deployments aligned with their organization’s security maturity.

Examples include placing nonfunctional administrative accounts in Active Directory, creating decoy file shares, deploying unused service accounts, inserting fake secrets into monitored repositories, and establishing isolated hosts that mimic valuable systems.

However, the agency stressed that these decoys must be carefully designed so attackers cannot exploit them to access real systems, data, or privileges.

Fake credentials should not function in production environments, and decoy systems should be segmented, monitored, and protected to prevent them from becoming a pivot point into operational networks.

This strategy complements Zero Trust security models, which assume that an adversary may eventually gain some level of access to an environment.

Instead of relying solely on perimeter controls or preventive identity protections, cyber decoys incorporate continuous verification and detection mechanisms within the network.

This approach can help security teams identify suspicious use of remote administration tools, credential dumping activity, network discovery, unauthorized cloud access, and attempts to locate privileged accounts or sensitive data.

CISA also said decoy operations can reduce alert fatigue because interactions with carefully placed fake assets are less likely to stem from legitimate user activity.

Security operations centers can prioritize these detections for rapid investigation, correlate them with endpoint and identity telemetry, and leverage the resulting evidence to understand an attacker’s techniques, objectives, and scope of access.

The guidance aligns decoy planning and implementation with the MITRE Engage and MITRE ATT&CK frameworks. Organizations are encouraged to define objectives, identify likely adversary paths, deploy targeted deception assets, create incident response playbooks, and continually refine their decoy environments based on observed activity.

For critical infrastructure operators and smaller organizations alike, CISA’s message is clear: assume that attackers can gain entry, then make every unauthorized step they take visible.

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