ReversingLabs Spectra Analyze has a "hash harvesting" functionality and millions of malware samples. A ReversingLabs customer can place a certain number of YARA signatures into their analytic engine. When a YARA signature is being run on the analytic engine, it is being run against the hundreds of millions of malware samples. If there is a match, the malware sample information is provided by ReversingLabs. This integration will log into ReversingLabs and download information on all the YARAs in the engine. Additionally, any information associated with matched malware samples will be downloaded.