[aclug-L] Re: Hacker or ??

[Maverick <mluvw47@xxxxxxxxx>]

Thanks, that is pretty helpful, but how can I set a
cron job that run this script once every hour?

Mav
--- Jeff Vian <jvian10@xxxxxxxx> wrote:
> 
> I just posted a script from Linux Journal that will
> let ip chains block
> this attack.
> It appears to be the new Nimba worm
> 
> The script text is below
> 
> 
> 
> 
> Tech Tip
> 
>    The  Linux  Journal web site, like others, is
> getting a lot of
> traffic
>    from  the  Windows worm du jour. Here's the cron
> job our sysadmin
> team
>    is using to block them from our Apache-based
> site.
> 
> #!/bin/sh
> #
> # Block sites which originate Nimba queries from
> Apache server
> # Apache must be configured with HostnameLookups Off
> 
> LOGS=/var/log/httpd
> 
> cd $LOGS
> 
> grep '^[0-9]*\.[0-9]*\.[0-9]*\.[0-9]* ' *
> 2>/dev/null |
> awk '/system32\/cmd\.exe/ {sub(/[^:]*:/,"");print
> $1}' |
> sort -u |
> while read host
> do
> if ! fgrep $host /var/tmp/blocked >/dev/null
> then
> echo $host >>/var/tmp/blocked
> /sbin/ipchains -I input -s $host -j DENY -l
> fi
> done
> 
> 
> 
> 
> 
> 
> 
> Steven Saner wrote:
> > 
> > Appears that this is the worm that Glandix
> reported. I got the
> > readme.exe email this morning as well. It was made
> to appear like a
> > bounce back message from someplace.
> > 
> > Steve
> > 
> > On Tue, Sep 18, 2001 at 12:49:24PM -0500, Joshua S
> Brown wrote:
> > >
> > > We are having the same problem on all our web
> servers. Is this a hack or
> > > something like code red?
> > >
> > >
> > > Josh Brown
> > >
> > > On Tue, 18 Sep 2001, Maverick wrote:
> > >
> > > >
> > > > Hi, all
> > > >  Recently I check on my apache webserver
> access.log
> > > > and find out a lot of entrie like this:
> > > > 24.254.90.73 - - [18/Sep/2001:10:44:38 -0700]
> "GET
> > > > /scripts/..%c0%af../winnt/sys
> > > > tem32/cmd.exe?/c+dir HTTP/1.0" 404 231
> > > > 24.254.90.73 - - [18/Sep/2001:10:44:39 -0700]
> "GET
> > > > /scripts/..%%35%63../winnt/sy
> > > > stem32/cmd.exe?/c+dir HTTP/1.0" 400 215
> > > > 24.254.90.73 - - [18/Sep/2001:10:44:41 -0700]
> "GET
> > > > /scripts/..%%35c../winnt/syst
> > > > em32/cmd.exe?/c+dir HTTP/1.0" 400 215
> > > > 24.254.90.73 - - [18/Sep/2001:10:44:43 -0700]
> "GET
> > > > /scripts/..%c1%9c../winnt/sys
> > > > tem32/cmd.exe?/c+dir HTTP/1.0" 404 231
> > > > .....
> > > >
> > > > Is that someone try to access my
> /var/www/scripts/?
> > > > and my error.log generate something like
> this..
> > > > Tue Sep 18 10:52:27 2001] [error] [client
> > > > 24.234.20.197] File does not exist: /
> > > > var/www/c/winnt/system32/cmd.exe
> > > > [Tue Sep 18 10:52:28 2001] [error] [client
> > > > 24.234.20.197] File does not exist: /
> > > > var/www/d/winnt/system32/cmd.exe
> > > > ....
> > > >
> > > > anyone have any idea? or did I set something
> wrong?
> > > > or really have a hacker knocking on my door?
> > > >
> > > > Thanks.
> > > > Mav
> > > >
> > > >
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