Re: CRv2 multiple scans from same source IP

From: Paul Gear (paulgearat_private)
Date: Mon Aug 06 2001 - 13:33:00 PDT

  • Next message: Marc Maiffret: "RE: Was RE: disinfection tool -- now a minor rant."

    Sent this last night, but it didn't make it through - moderated due to
    IP addresses?
    
    Chris Freeze wrote:
    
    > On Sun, 5 Aug 2001, John Davidson wrote:
    >
    > > My W2k IIS logs show 3 CRv2 scans from the same source IP within the same
    > > minute.
    >
    > Here everytime I get scanned, my Apache logs are showing a double hit.
    > Snort is also logging the two back-to-back attempts.
    > ...
    
    I wrote a little script to summarize the hits on my system by IP. 
    Here's an
    extract:
    
    1.a.a.7
            06/Aug/2001 06:54:50
            06/Aug/2001 06:54:50
    ...
    1.b.b.4
            06/Aug/2001 15:00:37
            06/Aug/2001 15:00:37
            06/Aug/2001 15:42:52
            06/Aug/2001 15:42:52
            06/Aug/2001 16:48:33
            06/Aug/2001 16:48:33
    ...
    1.c.c.5
            06/Aug/2001 19:52:31
            06/Aug/2001 19:52:31
    ...
    TOTAL:
            312 scans
            112 unique hosts
    
    Every scan (regardless of whether it's from my class A or not)
    consists of two probes.  I am getting multiple scans from each system,
    often quite a ways apart.  None of the requests are missing anything -
    they are all the right size.
    
    "Ben N. Venzke" wrote:
    
    > ...
    > If CodeRedII can only infect Windows 2000 boxes running IIS, why all
    > of the CodeRedII infection attempts from what appear to be DSL, cable
    > modem and dial-up boxes?
    >
    > I could see running a small server on a DSL line but are there really
    > that many people running IIS on a 56k dial-up.
    
    I thought that myself, but my brief investigations have shown
    otherwise.  I am
    a dialup modem user on a major Australian ISP.  My system is getting a
    lot more
    hits than i would have expected considering my bandwidth and nearly
    all of them
    are from my own ISP (as expected).  However, these machines do indeed
    seem to
    be running IIS - probably the default install.
    
    Here's what i got when i looked at the web server on one of the
    systems that
    probed me:
    
    HTTP/1.1 200 OK
    Server: Microsoft-IIS/5.0
    Date: Mon, 06 Aug 2001 09:29:07 GMT
    Connection: Keep-Alive
    Content-Length: 1270
    Content-Type: text/html
    Set-Cookie: ASPSESSIONIDQGQGQHJC=LJAFGGCDOKEPBGGPBDDPBGLF; path=/
    Cache-control: private
    
    
    <!--
              WARNING!
              Please do not alter this file. It may be replaced if you
    upgrade your
    web server
         If you want to use it as a template, we recommend renaming it,
    and
    modifying the new file.
              Thanks.
    -->
    
    
    <HTML>
    
    <HEAD>
    <META HTTP-EQUIV="Content-Type" Content="text-html;
    charset=Windows-1252">
    
    
    
    <title id=titletext>Under Construction</title>
    </HEAD>
            <body bgcolor=white>
            <TABLE>
            <TR>
            <td id="tableProps" width=70 valign=top align=center>
            <IMG id="pagerrorImg" SRC="pagerror.gif" width=36 height=48>
            <TD id="tablePropsWidth" width=400>
    
            <h1 id=errortype style="font:14pt/16pt verdana;
    color:#4e4e4e">
            <id id="Comment1"><!--Problem--></id><id id="errorText">Under
    Construction</id></h1>
            <id id="Comment2"><!--Probable causes:<--></id><id
    id="errordesc"><font
    style="font:9pt/12pt verdana; color:black">
            The site you were trying to reach does not currently have a
    default
    page. It may be in the process of being upgraded.
            </id>
            <br><br>
    
            <hr size=1 color="blue">
    
            <br>
            <ID  id=term1>
            Please try this site again later. If you still experience the
    problem,
    try contacting the Web site administrator.
            </ID>
            <P>
    
            </ul>
            <BR>
            </TD>
            </TR>
            </TABLE>
            </BODY>
    
    
    </HTML>
    
    To my untrained eye, this looks like it might be a default root page
    that IIS
    installs.  It seems that every man and his dog with Win2K on their
    home PC are
    joining in the fun.
    
    Paul
    http://paulgear.webhop.net
    
    ----------------------------------------------------------------------------
    This list is provided by the SecurityFocus ARIS analyzer service.
    For more information on this free incident handling, management 
    and tracking system please see: http://aris.securityfocus.com
    



    This archive was generated by hypermail 2b30 : Mon Aug 06 2001 - 14:33:16 PDT