Re: Scan that doesn't make sense

From: Johan Augustsson (johan.augustssonat_private)
Date: Wed Feb 06 2002 - 10:04:17 PST

  • Next message: Pat Moffitt: "Why would my machine do this?"

    On Wed, Feb 06, 2002 at 11:39:56AM -0500, McCammon, Keith wrote:
    > This certainly doesn't look like any of the well-known scripts that I've
    > seen in recent months.  In fact, if you look at the timestamps, it seems
    > likely that this was done manually.  Look at the different tools/methods
    > used to probe the system, and then look at the gaps between them.
    > Either a very odd script, or someone with too much time on their hands.
    > 
    > Do you happen to have any event correlation software in place that might
    > tell you if this fellow has been caught poking around prior to this
    > incident?
    > 
    > Cheers
    > 
    > Keith
    
    
    According to my Snort logs this was the first time this fellow got into
    that particular subnet. We do not have any centralised snort box for our
    /16 net yet so this is just for a /24.
    
    As I mentioned in my first mail there must be a truckload of traffic
    that Snort didn't pick up since we're only using the default ruleset
    plus a few custom rules to pick up the ftp and printer scans.
    
    But why did he first run some cmd.exe stuff and a few minutes later do
    an portscan? I just don't get it, or are those skriptkiddies realy that
    eherm... stupid?
    
    Are you guys getting any ICMP superscan Echo in your Snort logs? Since I
    wrote the rule (brag, brag, brag) it would be fun to know if folks are
    using it or if it triggers to much false alarms. The ICMP superscan
    Echoes I get doeas nearly all originate from dialups or *dsl accounts.
    That make me believe that SuperScan is the only tool (or one of very
    few) that uses a payload of eight zeroes in it's ICMP Echo Requests.
    
    /Johan
    
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