Category: Malware

Type: -

Aliases: Sober.Z, Email-Worm.Win32.Sober.z, W32/Sober.Z@mm


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 email 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

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

Knowledge Base

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About the product

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

This Sober variant sends a bit different email 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