The worm got a lot of media attention in late March, and while the news stories have tapered off, the worm isn't going anywhere.

Some worried that an April 1 change in the way Conficker received updates could mark the beginning of a new round of Internet attacks, but in reality the Conficker network has been only lightly used, security experts say.

"It's still a significant botnet. It hasn't done anything of significance, but it has not gone away," said Andre DiMino, cofounder of The Shadowserver Foundation and a member of the Working Group. "The remediations need to ramp up."

"This thing is not dead," he added. "Everyone has kind of passed it over, but it's not dead."