Threat Description

Sober.Z

Details

Aliases: Sober.Z, Email-Worm.Win32.Sober.z, W32/Sober.Z@mm
Category: Malware
Type:
Platform: W32

Summary


The Sober.Z worm was found on November 15th, 2005. This Sober variant is similar to Sober.T, that appeared on November 14th:

https://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.z'.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.



Technical Details


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

Subject:

Betr: Passwort & Account Daten  

Body:

Ihre Account bzw. Passwort aenderung wurde nun vorgenommen.  Ihre neuen Zugangsdaten befinden sich Ge-Packt & Gesichert im Anhang!  AutoMailSystem: #HF011BACC091F  

Attachment name starts with:

auto-mail_Daten  

---- OR ----

Subject:

Password Confirmation  

Body:

Your password has been changed successfully!  Your new password is packed and safe in the attachment  Auto-MailSystem: #B20F3A7299A1000FC2  

Attachment:

packed-password_text.zip  


Detection


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

Detection Type: PC
Database: 2005-11-15_05



Description Details: Alexey Podrezov; November 16th, 2005


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