Security Incidents mailing list archives

Re: Voluminous SSHd scanning; possible worm activity?


From: "Jay D. Dyson" <jdyson () treachery net>
Date: Mon, 10 Dec 2001 09:31:03 -0800 (PST)

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On Mon, 10 Dec 2001, Neil Dickey wrote:

    I've been seeing a lot of SSHd scans of late.
[ ... ]
    Has anyone else seen this sort of thing from their systems?

Until a month or two ago we *never* saw scans to port 22.  Now they are
common, though I'm not seeing anything like the intensity you describe. 
In a week I might see as many as six, total, and that would be a heavy
week for me. 

        Right now, the scans I'm seeing are coming in at around six in a
day.  Started four days ago.

Most of what I detect appear to be SYN scans.  Has anyone done a
honeypot study to find out what weaknesses are being exploited, or is it
just the usual bug in SSH1? 

        Perhaps we should touch base with the HoneyNet crew and see what
they've discovered?

- -Jay

   (    (                                                        _______
   ))   ))   .-"There's always time for a good cup of coffee"-.   >====<--.
 C|~~|C|~~| (>----- Jay D. Dyson -- jdyson () treachery net -----<) |    = |-'
  `--' `--'  `---------- Si vis pacem, para bellum. ----------'  `------'

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