Warning of a new computer worm, this time from South Korea. Yonhap reports Friday that W32/Smess.worm, BadTrans, appears attached to an instant message in MSN’s instant messenger service. The worm is a mutant version of another worm called Sinmsn, which was detected last July.MSN’s messenger service, which gives pairs or groups of users the capability to send instantaneous text messages to each other via the Internet, is one of the most popular communication tools in South Korea, where more than 10 million customers are connected to the broadband Internet.