Summary
A new variant of Netsky worm - Netsky.I was found on March 7th, 2004. This worm variant sends messages with an attachment name that looks like a hyperlink to INDEX.SCR file.
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
Descriptions of all previous NetSky worm variants can be found here:
- W32/NetSky.A@mm
- W32/NetSky.B@mm
- W32/NetSky.C@mm
- W32/NetSky.D@mm
- W32/NetSky.E@mm
- W32/NetSky.F@mm
- W32/NetSky.G@mm
- W32/NetSky.H@mm
The worm's file is a PE executable file 22016 bytes long, packed with PE-Pack file compressor. The unpacked file's size is over 27 kilobytes.
NetSky.I worm has a few modifications comparing to previous variants:
- The worm uses a different mutex: "KO[SkyNet.cz]SystemsMutex"
- The worm has a bit different message for Bagle And Mydoom worm authors
- On March 5th, 2004 the worm constantly beeps with PC speaker from 11:00 to 11:59. Below is the link to the WAV file with the sound that the worm makes: https://www.f-secure.com/virus-info/v-pics/netsky_d.wav
- The worm uses the following subject texts:
- The sender's name of an infected message is always 'service@[recipient's_domain] ' where [recipient's_domain] represents the domain name and suffix of an infected message's recipient.
- The worm installs itself to system as FOODING.EXE file.
- The worm creates the startup key named 'Tiny AV' for its file in System Registry.
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