Black market in e-Commerce is an industry of billions of dollars drawing thousands of scalpers and hackers. Traditionally, this black market is full of manual labor and low technology. The booming development of AI has also seen a vast abuse of AI technologies in this black market. This evolving black market costs billions of losses to e-Commerce companies, like Alibaba and Amazon. It also undermines the reputation of them. How to fight this black market and win back customers? We undercover the industrial chain of this black market and the detailed social division of labor, as well as various advanced tools. We also developed an AI-based defense system to intercept and block the malicious or suspicious transactions.