The Zscaler Potentially Abused File Download detection rule identifies downloads of potentially malicious file extensions such as .scr, .dll, .bat, and .lnk within a network environment using Zscaler's web proxy logs. By focusing on blocked actions, the rule analyzes log fields including device owner, user, URL category, destination, and filename. This detection is crucial because these file types are frequent vectors for malware dissemination, which can result in malware execution, data breaches, or additional network compromises. The implementation of this rule requires ingestion of Zscaler events into a Splunk instance, where it can provide insights into suspicious download activities that may pose threats to network security. Users are encouraged to adapt detection parameters as needed to fit their specific environments and to be aware of potential false positives related to Zscaler configurations.