Top 10 Malware Threats To Microsoft PCs

6. Trojan Downloaders And Droppers

Trojan downloaders and droppers made up 10.4 percent of detections in the fourth quarter of 2012. The activity was driven by infections of Swisyn, a family of Trojans that drops and executes malicious code on a victim's machine. Swisyn has been connected to keyloggers, worms and other malware types that attempt to record keystrokes, steal data and gain access to network drives and other systems.