THE HOAX IS an old trick, a mass e-mail which warns recipients that there’s a virus on their machine called Jdbgmgr.exe. The file is a legitimate system file needed to run Java programs, and it’s normally displayed with a bear icon. But the e-mail instructs recipients to find the file and delete it immediately. The hoax is now more convincing, because recipients associate the bear icon with the Bugbear virus, according to Craig Schmugar, a virus research engineer for Network Associates Inc. “The confusion is coming in part because of the virus name, and because the icon in question is a teddy bear. And the hoax has been tweaked to reference this new virus,” Schmugar said.