Certutil used to transmit or decode a file
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Goal
Detect when certutil is used to download a file or decode content.
Strategy
Threat actors are known to utilize tools found natively in a victim’s environment to accomplish their objectives. Certutil, a legitimate Windows binary, has been abused by malicious actors in the past to fetch additional tools and payloads, as well as decode obfuscated payloads to avoid detection.
Triage and response
- Identify what is being downloaded or decoded.
- If it’s not authorized, isolate the host from the network.
- Follow your organization’s internal processes for investigating and remediating compromised systems.
Requires Agent version 7.50.0 or greater.
This rule is a part of the beta for detections on Windows! If you would like to try the new Windows agent, create a support ticket and indicate that you wish to join the Cloud Security Management - Windows beta.
