ISR Stealer

ISR Stealer is a Windows infostealer.

Background

ISR Stealer is a reworked variant of the Hackhound Stealer. Coded in VB, it frequently ships inside a .NET wrapper and leverages two Nirsoft utilities, Mail PassView and WebBrowserPassView. Notably, it relies on a hard-coded user agent string: HardCore Software For : Public

Source: Malpedia (Fraunhofer FKIE).