Bagle variants punch, punch and punch again
Matt Loney writes in C|Net News:
The latest variants of the Bagle worm have alarmed antivirus companies because of the multiple-stage process they use to attack PCs.
The variants, which Computer Associates International has given a new name--Glieder--because it says they are so different from previous Bagle worms, combine several elements in a way not seen before. In this staged approach, viruses seed their victims, then disarm them, and then finally exploit them.