Re: Some new SSH exploit script?

[Christine Kronberg <seeker () shalla de>]

On Fri, 9 Jun 2006, Adam.Chesnutt wrote:
> You see, rather than do all this, I think it's much much smarter to turn over 
> the logs more, and write a script that outputs the log - without the script 
> kiddies if it really bothers you. You could make the script also write a 
> report and call it 'lame ssh hacktards' or something and contain only ip, 
> username and number of attempts..
>
> This is a piss poor solution to a real problem. If you have cruft, correlate. 
> Ignoring what are genuine (albeit lame) attempts to penetrate your security 
> is dumb.

  The real problem. That is not the scanning, but the hacked nodes being
  abused for it. The problem is people not knowing their systems are
  compromised and isps not interested in telling them or enforcing
  security measurements. The problem is people not caring in the state
  of their computers, acting irresponsible (I remember someone on usenet
  argueing that it's not his fault that his computer is being abused by
  other people) and getting away with it.
  The solution to the real problem can neither be moving the door nor
  blocking it. Moving the door or blocking it are just two strategies
  about how to deal with the consequences of the problem.

> If 3 people connect to this port, by all means, but just moving the port to 
> decrease your viability of hacktards isn't smart. Your not decreasing your 
> access, your moving the door. Firewall them for god's sake. Instead of 
> ignoring the problem, *DO SOMETHING*

  I do. I report attacks to the services open. Not attacks to services
  not open. If port 22/tcp is moved to another portnumber, then there
  are not attacks on port 22/tcp (to me a single syn is not an attack).
  At least not on the host with the moved door. There may be attacks on
  the other port; these attacks should indeed be reported.

> This is why I said something about my killapnic script. My killapnic script 
> is a much better solution than moving the port. Why? Because it actually does 
> something to disallow network access from the attacker, rather than 
> continuing to allow them access, and ignoring the signs of them trying to 
> break in.

  No, your script does not do that. It just blocks of apnic. What's about
  the rest of the world? Although many scans are originating from that
  region there are more than enough coming from other locations.
  And btw., I never saw the login after a "successful" scan coming from
  the scanning node. It was always from an entirely different location.
  So what is your consequence? Adding the rest of the world to you script?
  That's a no go for me.

> Consider zombies.. your in a house, and zombies are outside. Do you, move the 
> windows and doors to a new location, or board them up where they are? There's

  Doing both? What is it you want to archive? Less noice to concentrate
  on more important topics?
  Making sure the zombies are stopped and withdrawn? How do you enforce
  that (stopping ok, but how to withdraw them)?

> enough traffic, there's enough zombies, and the scripts are mostly smart 
> enough *already* to find nonstandard ports. Can we please join the future 
> here in good ole 2002?

  Well, the fact, that the ssh kiddies are not only coming from the apnic
  ranges traces back in around late 2004...

  Have a nice weekend,


  Chris Kronberg.

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