Threat Descriptions

Email-Worm:W32/Sober.X

Classification

Category :

Malware

Type :

-

Platform :

-

Aliases :

Sober.X, Email-Worm.Win32.Sober.x, W32/Sober.X@mm

Summary

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

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.x'.

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:

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: