|W32.Netsky.U@mm is a mass-mailing worm and a variant of W32.Netsky.S@mm.
Also Known As: W32/Netsky.u@MM, W32/Netsky-U, WORM_NETSKY.U, Win32.Netsky.U
This worm also contains backdoor functionality and if the computer's system date is between April 14, 2004 to April 23, 2004,
the worm will attempt a DoS attack against the following Web sites:
www.cracks.am; www.emule.de; www.kazaa.com; www.freemule.net; www.keygen.us
Scans drives C through Z (excluding the CD-ROM drives) and retrieves the email addresses from the files with the predefined extensions.
Uses its own SMTP engine to send itself to all the email addresses that it finds.
The Subject and Attachment name vary. The attachment has a .pif file extension.
Copies itself as %Windir%\SymAV.exe.
Creates a mutex, "SyncMutex_USUkUyUnUeUtUU," to allow only one instance of the worm to execute.
Creates the file, %Windir%\fuck_you_bagle.txt, which is a MIME-encoded copy of the worm's executable.
Adds the value: "SymAV"="%Windir%\SymAV.exe"
to the registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Listens on port 6789. If an attacker sends an executable file to an infected computer,
the worm will save it as an executable file with a random file name, and then execute the file.
You can use antivirus (also check How To Remove section)to remove this worm from the system registry.