W32/Netsky-J

Type
Win32 worm

Description
W32/Netsky-J is a mass mailing worm that uses its own SMTP engine to email itself to addresses harvested from files on local drives.
In order to run automatically when the user logs on to the computer the worm copies itself to the file winlogon.exe in the Windows folder and creates the following registry entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\ICQ Net
=<Windows folder>\winlogon.exe -stealth

Emails have the following characteristics:

Subject lines:

Re: Your website
Re: Your product
Re: Your letter
Re: Your archive
Re: Your text
Re: Your bill
Re: Your details
Re: My details
Re: Word file
Re: Excel file
Re: Details
Re: Approved
Re: Your software
Re: Your music
Re: Here
Re: Re: Re: Your document
Re: Hello
Re: Hi
Re: Re: Message
Re: Your picture
Re: Here is the document
Re: Your document
Re: Thanks!
Re: Re: Thanks!
Re: Re: Document
Re: Document

Message texts:

Your file is attached.
Please read the attached file.
Please have a look at the attached file.
See the attached file for details.
Here is the file.
Your document is attached.

Attached filename:

your_website.pif
your_product.pif
your_letter.pif
your_archive.pif
your_text.pif
your_bill.pif
your_details.pif
document_word.pif
document_excel.pif
my_details.pif
all_document.pif
application.pif
mp3music.pif
yours.pif
document_4351.pif
your_file.pif
message_details.pif
your_picture.pif
document_full.pif
message_part2.pif
document.pif
your_document.pif

Analysis of W32/Netsky-J is continuing. A fuller description will be available shortly. Please check again later.

http://www.sophos.com/virusinfo/analyses/w32netskyj.html