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 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



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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