Many organizations face a significant challenge in identifying adversaries who operate stealthily within their networks. These threat actors often use valid credentials and native system tools – a technique known as **living off the land (LOTL)** – to conduct reconnaissance, move laterally, and exfiltrate data without triggering conventional alarms. **CISA's** new guidance focuses on the implementation of cyber decoys: assets that mimic legitimate systems, accounts, or data but are specifically engineered to distract, detect, or collect intelligence on malicious activity. ### Decoys Complement Zero Trust As organizations increasingly adopt **Zero Trust** models, which assume a breach is inevitable and verify every access request, cyber decoys serve as a critical complementary layer. They provide several key benefits: * **Supporting continuous monitoring and verification:** Decoys offer additional points of observation within the network. * **Creating high-fidelity alerts for suspicious activity:** Interaction with a decoy by a legitimate user is highly unlikely, making any engagement a strong indicator of compromise. * **Reducing alert fatigue:** By generating alerts only when an adversary interacts with a decoy, security teams can focus on genuine threats. * **Helping defenders detect post-compromise activity:** Decoys are particularly effective at revealing an adversary's presence and activities after an initial breach, including **LOTL** techniques. ### Practical Implementation with MITRE Frameworks The **CISA** guidance introduces fundamental decoy concepts such as tripwires, breadcrumbs, and honeytokens. It leverages the widely recognized **MITRE Engage™** and **MITRE ATT&CK®** frameworks to provide actionable, low-complexity steps for planning, deploying, and refining decoy operations. This integration allows security teams to map decoy strategies directly to known adversary tactics and techniques, enhancing their overall defensive posture. For further information on mapping security controls to adversary behaviors, **CISA** also recommends reviewing their **Best Practices for MITRE ATT&CK Mapping** resources.