Claud Xiao (@claud_xiao) is a principal security researcher at Palo Alto Networks where he is working on advanced malware research and building antivirus services for OS X, iOS and Android. Prior to joining Palo Alto Networks, he was a senior researcher at Qihoo and was a senior researcher at Antiy Labs. In recent years, he's revealed some interesting malware and attacks including WireLurker, KeyRaider, XcodeGhost, AceDeceiver and KeRanger which have led to widespread conversations and rethinking of the Apple ecosystem's security and malware problem.