Whether it's an actual functional update or a ploy to further inflate the worm's horrifying reputation, an encrypted, mysterious thing is downloading to machines infected with Conficker C, right now. UPDATED
The original Conficker doomsday, April 1st, came and went without serious incident. But as Mahoney explained, the worm's subtle update that day left us at much greater risk than before. This so-far inscrutable update could be the first manifestation of security experts' concerns; Trend Micro, in a blog post that sounds more like it was written by a President in an apocalypse movie than a software security expert, has only been able to determine that the payload polls popular websites to check for connectivity, then deletes itself. They speculate, however, that it could be installing a data-gathering Waledac virus.