Sober.X

Summary

The Sober.X 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.x'.

Disinfection & Removal

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

Technical Details

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

Subject:

Wichtig: Meine neue Mail Adresse!

Body:

hi du,,, ike bin et
 Musste mir leider ne neue Mail-Addy machen. Meine alte wird
 nur noch zu gemuellt mit Spam.
 Habe dir auch gleich die Datei mitgeliefert die du immer
 haben wolltest. Ist aber ziemlich per....
 Ok, man sieht sich

Attachment name starts with:

Mail-Datei

---- OR ----

Subject:

Your eMail Password

Body:

Thanks for your registration! Your registration will not be
 complete until you re-confirm it. Please read the following
 agreement. If you accept it, click the Accept to complete
 your registration!

Attachment:

Accept_e-Text.zip

Writeup:

Detection

Sober.X worm is detected with the following F-Secure Anti-Virus updates:
Database: 2005-11-15_04

Description Created: Alexey Podrezov; November 15th, 2005