Orome1 writes: Virus and malware activity increased during the month of May, sporadically hitting peaks of more than 10 million pieces per day. Major news events, once again, became fodder for malware campaigns while large companies continued to be the target of attackers. ZeuS is still around and going strong. Its source code has made its way into the hands of security researchers, but that hasn’t slowed it down. Russia still holds the top spot as the number one country for spam origination. Also, Brazil’s output surpassed the US for the first time in many months.