Malware type: Worm

Aliases: Email-Worm.Win32.Sobig.a (Kaspersky), W32/Sobig.a@MM (McAfee), W32.Sobig.A@mm (Symantec), Worm/Sobig.A (Avira), W32/Sobig-A (Sophos), Worm:Win32/Sobig.A@mm (Microsoft)

In the wild: No

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000 and XP

Encrypted: No

Description: 
The multi-threaded worm uses its own SMTP engine to send email.

It obtains the recipients from addresses found in the following files:

• WAB
• DBX
• HTM
• HTML
• EML
• TXT

The email format is as follows:

Sender: big@boss.com

Subject: (Chosen from any of the following:)
Re: Movies
Re: Sample
Re: Document
Re: Here is that sample

Attachment: (Chosen from any of the following:)
Movie_0074.mpeg.pif
Document003.pif
Untitled1.pif
Sample.pif

The worm also has the capability to download files from remote Web sites and spread copies of itself to shared folders.

For additional information about this threat, see:
Solution
Technical Details

Description created: May. 21, 2003 5:48:15 PM GMT -0800
Description updated: Jan. 10, 2003 12:00:00 AM GMT -0800

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