Mini-botnets specialize in identity theft, fraud, and stealing corporate information. They don’t attract the attention of the big spamming botnets that cast a wide net and generate lots of traffic. The main goal of specialized botnets is to steal user names and passwords, banking credentials, intellectual property. These botnets include Clampi (a.k.a. Ligats and Rscan), Torpig, Anserin, Zeus, Pinch and SilentBanker Cimuz.”]
Source: https://www.darkreading.com/attacks-breaches/attack-of-the-mini-botnets