A Worm's Worm
Carnildo writes "There's a new worm out, according to the Register, but one with a twist. This one, called 'Dabber', infects computers by exploiting a security hole in the Sasser worm."
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Perhaps you are thinking of Welchia which exploited IIS but also removed Blaster.
My son's 5th grade teacher actually assigned them "write a limerick about a planet". I'm not kidding.
The mentioned code, which is used in Dabber, can be found at http://packetstormsecurity.nl/0405-exploits/sasser ftpd.c
Add the sasser FTP server to your nmap-services file. I run Gentoo, mines in /usr/share/nmap.
:)
Add this line:
sasser 5554/tcp # Sasser worm FTP server
This way when you do a port scan of a host, you can tell if they've been infected with sasser