Summary

The Sober.V worm was found on November 15th, 2005. This Sober variant is similar to Sober.T, that appeared yesterday:

http://www.f-secure.com/v-descs/sober_t.shtml

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.v'.

Additional Details

This Sober variant sends a bit different e-mail messages:

Subject:

 Hi, Ich bin's

Body:

 Hier ist die Liste die du haben wolltest.
 Du solltest dich aber auch eintragen!

 OK, bis dann

Attachment name starts with:

 Liste

---- OR ----

Subject:

 Thanks for your registration

Body:

 Thanks for your registration!
 We have received your payment.

 For more detailed information, read the attached text.

Attachment:

 reg_text.zip

Detection

Sober.V worm is detected with the following F-Secure Anti-Virus updates:

Version=2005-11-15_01

Writeup: Alexey Podrezov; November 15th, 2005;