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Virus Name  : W32.Sober.AA@mm

Alias             : I-Worm.Sober.AA, W32/Sober.AA@mm, W32/Sober-AD, WORM_SOBER.AX, Sober.AA, Email-Worm.Win32.Sober.aa

Virus type    : Internet worm

Threat level : Medium

Virus details :

                     Sober.AA is a mass mailing worm uses e-mail addresses collected from the system to distribute infected mails. The worm uses its own SMTP engine to spread. The infected mail will be in English or German.

The infected mail subject in English will be one of the following

Error in your eMail
Your Updated Password!

The infected mail subject in German will be one of the following

Ihr Passwort wurde geaendert!
Fehlerhafte Mailzustellung
Ihr Account wurde eingerichtet

The infected mail Attachment name in English will be one of the following

The infected mail Attachment name in German will be one of the following

The infected mail message body in English will be one of the following

You notified us that you have forgotten your password.We have changed your password to a random sequence of letters and digits! For more detailed information, see the attached password file ...

Your eMail has occurred an unknown error on our Server.Please read your mail and check the text.The full email is attached!

The infected mail message body in German will be one of the following

Ihr Passwort wurde erfolgreich geaendert.Ihre neuen Account-Daten und Passwort befinden sich gesichert im Anhang!

Diese Nachricht wurde Automatisch generiert. - Ihre EMail konnte nicht empfangen oder gesendet werden.

Danke das Sie sich fuer uns entschieden haben.Um ihren neuen Account zu aktivieren, folgen sie der kurzen Anleitung im Anhang. Es sind nur 2 Schritte noetig!

                  When the infected e-mail attachment is executed, it displays a fake error message "WinZip Header is missing!" with title "WinZip Self-Extractor" and copies to %WINDOWS%\PoolData\services.exe. It also drops SMSS.EXE, CSRSS.EXE, and data files in the infected system.Then it modifies the registry to load automatically on next startup. The registry key modification is given below.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run = "WinData"="%WINDOWS%\PoolData\services.exe"

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run = "_WinData"="%WINDOWS%\PoolData\services.exe"

                     Sober.AA worm collects e-mail address from the following files


                   This worm is also known as I-Worm/Sober.AA, Email-Worm.Win32.Sober.aa, Win32/Sober.AA, WORM_SOBER.AX, W32/Sober-AD. Sober.AA variant appeared on 1st May 2007.

How can I protect my system?

                   Solo has incorporated W32.Sober.AA@mm in its signature file to protect users from this worm attack. Solo antivirus registered users are already protected from this worm. Make sure that you have installed registered version of Solo Antivirus to protect your system from all virus threats.

How to remove this worm?

                   If you are already infected with this worm, you can remove it from your computer using Solo Antivirus software. Solo antivirus can detect and remove W32.Sober.AA@mm safely. Use the following link to Download 30 day trial version of Solo antivirus to remove viruses from your computer.

                   Solo anti-virus not only scans for all viruses, it contains a unique System Integrity Checker to protect you from New Internet Worms, Backdoors and malicious VB, Java Scripts. It also effectively removes all existing Internet Worms, File viruses, malicious VBS, Java scripts, Trojans, Backdoors, boot sector, partition table and macro viruses.

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