Worm:W32/NetSky.J

Classification

Malware

Email-Worm

W32

NetSky.J, W32/NetSky.J@mm, I-Worm.NetSky.j, W32.NetSky.J@mm

Summary

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

Removal

Automatic action

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.

Suspect a file is incorrectly detected (a False Positive)?

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 detection database 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.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

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.