With the addition of 2012’s numbers, the grand total of all malware samples in PandaLabs’ database has reached approximately 125 million and researchers estimated that at least 27 million new strains of malware were created in 2012 alone. Trojans continued to account for most of the new threats, comprising three out of every four new malware strains created in 2012. One of the reasons for this growth was the increased use of exploit kits such as Black Hole, which are capable of exploiting multiple system vulnerabilities to infect computers automatically without user intervention.