Just like the Conficker worm, another worm known as Neeris targets computers that are unpatched and infects themselves upon those machines. On Sunday, the United States Marshals were attacked by the Neeris worm on many of their computers. The systems that were infected had to be shut down by IT workers to prevent further spreading of the problem. As of right now, this situation is being blamed on the United States Marshals using a backlevel antivirus software, Trend Micro OfficeScan 5.0, as well as patches not being applied to the computers. The fix has been worked on since yesterday when the problem was found, though the whole attack seems rather odd since the patch for the Neeris worm has been out since October of last year.