You can use the VirusTotal App for the following use cases in Splunk:

1. Forensic Analysis: Check if a file hash, IP address, URL, or domain has been flagged as malicious by security vendors.

2. Alert Enrichment: Enhance security events with contextual threat intelligence by adding Indicators of Compromise (IOCs).

3. Threat Hunting: Investigate suspicious entities such as external connections, downloads, or domains within your environment.

4. Automation of Decisions: Automatically enrich events and take actions based on reputation, such as blocking an IP address, quarantining a file, or escalating an alert.