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Nearly one-third of the world's computers could be infected with malware, suggests a report released last week by the Anti-Phishing Working Group. Malicious apps invaded 32.77 percent of the world's computers, a more than 4 percent jump from the previous quarter's 28.39 percent, the report estimates. The increase in infected computers has come hand-in-hand with a jump in the appearance of malware samples, said Luis Corrons, technical director of PandaLabs, the research arm of Panda Security, one of the sponsors of the APWG report. "The creation of malware samples is skyrocketing," Corrons told TechNewsWorld. "It has doubled from the last quarter to the first quarter of this year." In the last quarter of 2013, some 80,000 malware samples a day were discovered by Panda researchers. In the first quarter of 2014, that number jumped to 160,000. Hiding in Numbers By far, most of the new malware strains (71.85 percent) and malware infections (79.70 percent) are Trojans. Less than a quarter of new malware strains (22.70 percent) and malware infections (12.77 percent) are viruses and worms. "At the end of the day, malware is created to steal information," Carrons explained. "Trojans are the most suitable malware to do that." The primary motivation behind creating so many new malware strains is to avoid detection by antivirus programs. Those programs use signatures to identify malicious software. Since each new bad app strain contains a new signature, constantly introducing new strains extends the time a malicious app can remain virulent.