Angel M. Villegas Angel M. Villegas is a malware reseacher for Cisco Talos. Amongst Angel's notable achievements, he is the author of FIRST - the Function Identification & Recovery Signature Tool, which allows infosec analysts and reverse engineers to perform collective malware analysis. Angel is also the creator of the Villegas Diet - a revolutionary new way to consume the tears of malware authors for sustenance. Angel's hobbies include hot air balloon surfing, lion fish taming, and Sumarian freestyle rapping.