Threat Description

NetSky.J

Details

Aliases:NetSky.J, W32/NetSky.J@mm, I-Worm.NetSky.j, W32.NetSky.J@mm
Category:Malware
Type:Email-Worm
Platform:W32

Summary



A new variant of Netsky worm - Netsky.J was found on March 8th, 2004.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.

Eliminating a Local Network Outbreak

If the infection is in a local network, please follow the instructions on this webpage:



Technical Details



Descriptions of all previous NetSky worm variants can be found here:

The worm's file is a PE executable file 27648 bytes long.

NetSky.J worm has a few modifications comparing to previous variants:

  • The worm uses a different mutex: "SkYnEt_AVP"
  • The worm has message for Bagle And Mydoom worm authors in the same lines as previous ones.
  • The worm uses the following subject texts:
    • Your product
    • Your letter
    • Re: corrected homework
    • Re: I've found your document
    • Re: Your bill
    • Re: hello again
    • Re: hi again
    • Re: part 3
    • Re: important document part 2
    • Re: important
    • Re: Your data
    • Re: Your application
    • Re: your music
    • Re: excel document
    • Re: Re: Re: word document
    • Re: Your details
    • Re: My details
    • Re: Your requested file
    • Re: Read it immediately
    • Re: Approved
    • Re: Your software
    • Re: my memberlist
    • Re: Your document
    • Re: Your file
    • Re: Your important document
    • www.%s.tripod.com
    • Hi Mr. %s
    • Moi %s
    • He %s
    • Yours faithfully, %s
    • Message to %s
    • Hi Mrs. %s
    • Is %s.doc yours?
    • Is %s.xls yours?
    • Whats up %s
    • www.paypal.com/%s
    • Na %s
    • Best %s
    • Love %s
    • Good morning %s
    • Have a good day %s
    • Dear %s
    • To %s , it's me
    • Welcome %s
    • Moin %s
    • Hello %s
    • Your account %s is expired!
    • Hey %s
    • Hi %s
    • www.%s.freepage.com, your website
    • Hi %s, your product
    • Hello %s, your letter
    • Re: Hi %s, your archive
    • Re: %s, your text
    • Re: Hello %s, your bill
    • Re: Hi %s, your details
    • Re: Hello %s, my details
    • Re: Hi %s, your word file
    • Re: Hello %s, your excel file
    • Re: Hi %s, details
    • Re: Hello %s, Approved
    • Re: Hello %s, your software
    • Re: Hi %s, your music
    • Re: Dear %s, Here
    • Re: Re: Re: Hello %s, your document
    • Re: Hi %s
    • Re: Dear %s, Hi
    • Re: Re: Hi %s, your message
    • Re: Here %s, your picture
    • Re: Hi %s, here is the document
    • Re: Hello %s, your document
    • Re: %s, thanks!
    • Re: Re: %s, thanks!
    • Re: Re: Hi %s, document
    • Re: Hello %s, document
    Where %s will be substituted by some text.
  • The worm uses the following message body texts:
    • My details are in the attached file.
    • I have corrected your document.
    • Please do not forget to read the important document.
    • I have an interesting document about you.
    • The sample is attached.
    • Your personal document is attached.
    • Your file is attached to this mail.
    • Note that I have attached your file.
    • The important document is attached.
    • Please read the document. It's important.
    • Your document is attached to this mail.
    • See the attachment for further details.
    • Your file is attached. Use this password for the file: %i.
    • Please read the attached file. Password for the file is %i.
    • Please have a look at the attached file. Password for decrypting is %i.
    • See the attached file for details. Password is %i.
    • Here is the file. My password is %i.
    • Your document is attached. Your password is %i.
  • The worm installs itself to system as avpguard.exe file.





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