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.
Removal
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.
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 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.
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
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