Threat description



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

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'.


Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.

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

Contact Support

F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

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


Betr: Passwort & Account Daten


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

Attachment name starts with:


---- OR ----


Password Confirmation


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


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

Detection Type: PC

Database: 2005-11-15_05

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