The Sober.U worm was found on November 15th, 2005. This Sober
variant is similar to Sober.T, that appeared yesterday:
Like the previous variants, this one sends itself inside a ZIP
archive as an attachment in e-mail messages with English or
German texts. We also received several different droppers for
this worm variant. They were apparently created by the worm
author manually. They are all detected as 'Sober.u'.