CISA guidance on using fake data to catch hackers

CISA released new guidance on using cyber decoys to strengthen detection and response, according to the agency’s advisory. The goal is simple: set traps that alert you when an intruder is already inside.

Many organizations struggle to spot bad actors who use legitimate tools to move around. These attackers often have valid login credentials. They use native systems to discover data and access what they want. Standard monitors often miss this activity because it looks like normal work. (CISA)

Cyber decoys are assets that appear to be legitimate but are designed to detect presence. They act as tripwires, breadcrumbs, or honeytokens. If someone touches a fake file or clicks a decoy link, you get a high-fidelity alert. It cuts through the noise of daily IT chatter.

This approach complements Zero Trust models. You assume a threat actor may already have some level of access. The guidance introduces concepts like tripwires to detect post-compromise activity. It uses MITRE Engage and MITRE ATT&CK frameworks to provide practical steps for planning decoy operations.

Here’s what you can do this week. Review CISA’s guidance on planning and implementing cyber decoy strategies. Consider using decoy concepts like tripwires to detect intruders using legitimate tools. Explore the MITRE Engage starter kit for low-complexity steps on refining decoy operations.

We think this is a smart move for any office that handles sensitive data. It’s better to know a hacker is in the building than to find out after the fact. Get the most you can afford from these free resources.

Sources: CISA Cybersecurity Advisories.