RiskRanker is a unique analysis system that can automatically detect whether a particular app exhibits dangerous behavior. It differs from other malware tools by identifying apps with risky behavior while they are in the app market and before they make their way to a user’s phone. NQ Mobile’s Mobile Security Research Center, in collaboration with North Carolina State University, disclosed a new way to detect mobile threats without relying on known malware samples and their signatures. In a trial run earlier this year Risk Ranker scanned over one hundred thousand apps and identified 718 malware threats, including 322 zero-day threats.
Source: https://thehackernews.com/2012/06/riskranker-new-malware-detection.html