In the context of Detection Analysis , identifying the "root cause" or the source of an infection requires tracing the process lineage back to the point of entry. In the provided execution chain—Unknown Process - > chrome.exe - > wscript.exe - > powershell.exe—each node represents a stage of the attack. While powershell.exe is the execution engine for the malicious script and wscript.exe is the intermediate handler (likely executing a downloaded .vbs or .js file), chrome.exe represents the ingress point.

By investigating chrome.exe , an analyst can uncover critical forensic artifacts such as the specific URL the user visited, the domain from which the malicious file was downloaded, or a potentially compromised website that initiated a drive-by download. In the Falcon platform, looking at the ParentProcessId and the CommandLine of chrome.exe (or using the Bulk Domain Investigate tool for associated network connections) provides the "Who" and "How" of the initial access. Although the "Unknown Process" sits at the top of the tree—typically representing a process that started before the Falcon sensor—the activity relevant to the script's delivery is contained within the Chrome session. Mastering this "parent-ancestor" relationship is fundamental to effective hunting, as it allows responders to move beyond simple remediation of the script execution and address the underlying delivery mechanism to prevent future re-infection.

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