<A HREF="http://news.zdnet.com/2100-1009_22-5594201.html?tag=nl.e589">A new variant of Bagle</A> is spreading rapidly, security companies have warned. Rather than a mass-mailing worm, BagleDl-L is a Trojan horse that damages security applications and attempts to connect with a number of Web sites. It has been sent via spam lists to millions of addresses in the past 12 hours, said security company McAfee, which has upgraded it to a "medium" risk. The new variant could also have boosted overall Bagle traffic, which has increased five times in the past 24 hours, e-mail security vendor Postini said Tuesday.