Threat Description

NetSky.L

Details

Aliases: NetSky.L, W32/Netsky.L, I-Worm.Netsky.l
Category: Malware
Type: Email-Worm
Platform: W32

Summary



Another Netsky variant discovered on March 10th 2004. It drops itself as AVprotect.exe to Windows directory.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

Eliminating a Local Network Outbreak

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



Technical Details



This new variant is a stripped down version, just containing a minimum set of features and with no comments on the ongoing virus war.

It will create the following key to point to itself:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
 "HtProtect" = %sysdir%\AVprotect.exe

And create a mutex named "Rabbo" so it's not run more than once.

Email Spreading

It will spread using any of the following subjects:

Re: Important
 Re: Your document
 Re: Your details
 Re: Approved

With message bodies from the list:

Your file is attached.
 Please read the document.
 Your document is attached.
 Please read the attached file.
 Please see the attached file for details.

And with attachment names from:

your_file_%s.pif
 details_%s.pif
 document_%s.pif

Where '%s' will be substituted by a text string.






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