Called GinMaster or GingerMaster, this Android family was first detected by researchers in 2011 at North Carolina University. Comprising 6 percent of total Android malware threats and landing it in the No. 5 spot on Trend Micro's list, the malware family is repackaged into legitimate apps, including those displaying racy images of women. The Trojan initially contained dangerous rootkit capabilities, installing its root shell into the system partition for later use, according to the initial research. Variants of the malware are designed to silently collect the device ID, phone number and other data on the victim, Trend Micro said.