A less common but dangerous kind of malware, rooter malware has the capability to root infected devices, giving an attacker complete control of the Android smartphone or tablet. Trend Micro found that rooter malware made up only 4.4 percent of all Android threat types. Root privileges grants a remote attacker access to files and the device's flash memory. The threat is designed for targeted attacks to remain stealthy and persistent on the device, evading detection by most mobile antivirus applications. One such threat called Gonfu was detected in 2011 and can root a device by installing a malicious package called Legacy. Once infected, the rooting capability renders manual app remove ineffective, according to Trend.