Email-Worm:W32/Sober.Z

Classification

Malware

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

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 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'.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

Check for the latest database updates

First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample

After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning

If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

Note: You need administrative rights to change the settings.

Technical Details

This Sober variant sends a bit different email 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

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