What is this Very Stupid DOS Attack Script?

[Willem Jan Withagen]

Martin McCormick wrote:
> Apr  6 05:49:42 dc sshd[12422]: input_userauth_request: illegal
> 	user chuck
> 
> 	You get the idea.  This goes on for 3 or 4 minutes and then
> just stops for now.  I can almost promise that later, another attack
> will start from some other IP address and blaze away for a few
> minutes.

I asked the same question a while ago.
Seems that there are some linux type worms out there, that use this
to target not well protected linux systems.???
I've build some swatch-rules that after two of these hits, I dump
the host into ifpw-deny space.

--WjW