Worm:W32/NetSky.R

Classification

Malware

Email-Worm

W32

NetSky.R, W32/Netsky.R, I-Worm.Netsky.s, W32/Netsky.R@mm

Summary

The Netsky.R variant was discovered on March 31st, 2004. It's a stripped down version of NetSky.Q with around 80% of functionality in common with the previous variant.NetSky.R performs a DDoS against several websites.

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.

For more Support

Community

Find the latest advice in our Community.

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

System Infection

Upon execution the worm copies its dropper to the Windows Directory as 'PandaAVEngine.exe', which is added to the registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] =

"PandaAVEngine" = "%WinDir%\PandaAVEngine.exe"

where %WinDir% represents Windows directory name.

The main DLL is placed to the same place with the filename 'temp09094283.dll'.

The worm removes several registry values that belong to other worms.

Email Propagation

When collecting addresses NetSky.R recursively searches through all hard drives and checks the content of files with the following extensions:

.adb
.asp
.cfg
.cgi
.dbx
.dhtm
.doc
.eml
.htm
.html
.jsp
.mbx
.mdx
.mht
.mmf
.msg
.nch
.ods
.oft
.php
.pl
.ppt
.rtf
.sht
.shtm
.stm
.tbb
.txt
.uin
.vbs
.wab
.wsh
.xls
.xml

This variant of NetSky sends emails having the following subject:

Re: Document [random numbers]

Body:

Excuse me,
the important document is attached,
Yours sincerely

And attachment name:

Document[random numbers].pif

Payloads

Between 11th and 17th of April, 2004 NetSky.R infected computers will perform a Distributed Denial-of-Service attack against the following sites:

www.keygen.us
www.kazaa.com
www.emule-project.net
www.cracks.am
www.emule.de