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Current File : //proc/3/cwd/scripts/hackcheck
#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - hackcheck                                 Copyright 2015 cPanel, Inc.
#                                                           All Rights Reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

use Cpanel::Rand                 ();
use Cpanel::FileUtils::TouchFile ();
use Cpanel::SafeDir::MK          ();

$| = 1;

my $tmpdir    = Cpanel::Rand::gettmpdir();    # audit case 46806 ok
my $is_hacked = '';
if ( -d $tmpdir ) {
    foreach my $num ( 0 .. 9 ) {
        Cpanel::FileUtils::TouchFile::touchfile("$tmpdir/$num");
        if ( !-f "$tmpdir/$num" ) {
            $is_hacked = "Could not create file $tmpdir/$num: $!";
            last;
        }
        elsif ( !unlink("$tmpdir/$num") ) {
            $is_hacked = "Could not remove file $tmpdir/$num: $!";
            last;
        }
        Cpanel::SafeDir::MK::safemkdir("$tmpdir/$num");
        if ( !-d "$tmpdir/$num" ) {
            $is_hacked = "Could not create directory $tmpdir/$num: $!";
            last;
        }
        elsif ( !rmdir("$tmpdir/$num") ) {
            $is_hacked = "Could not remove directory $tmpdir/$num: $!";
            last;
        }
    }
    if ( !$is_hacked ) {
        if ( !rmdir($tmpdir) ) {
            $is_hacked = "Could not remove directory $tmpdir: $!";
        }
    }
}
else {    # Can't make random directory in /tmp
    $is_hacked = "Failed to create directory $tmpdir: $!";
}

my $msg = <<"EOM";
Attempts to create new directories or files whose filenames begin with numbers have failed.
This is indicative of a root compromise of the server.

The exact error encountered was:

$is_hacked

EOM

if ($is_hacked) {
    print "[hackcheck] Possible rootkit detected\n$msg";

    require Cpanel::Notify;
    Cpanel::Notify::notification_class(
        'class'            => 'Check::Hack',
        'application'      => 'Check::Hack',
        'constructor_args' => [
            'origin' => 'hackcheck',
            'reason' => $is_hacked
        ]
    );
}

exit if -e '/etc/disablehackcheck';

foreach my $account (qw(xfs daemon)) {
    my @pwnam = getpwnam($account);
    next if !$pwnam[0];
    if ( $pwnam[1] !~ m{^[\!\*]} ) {
        system( "/usr/bin/passwd", "-l", $account );
    }
}

my ( $user, $uid );
open( my $passwd, '<', "/etc/passwd" );
while (<$passwd>) {
    next if (m/^\#/);
    ( $user, undef, $uid, undef ) = split( /:/, $_, 3 );
    next if ( !defined $uid );
    if ( $uid == 0 && $user ne "root" && $user ne "toor" ) {
        system( '/usr/bin/passwd', '-l', $user );
        print "[hackcheck] $user has a uid 0 account (root access).\n";

        require Cpanel::Notify;
        Cpanel::Notify::notification_class(
            'class'            => 'Check::Hack',
            'application'      => 'Check::Hack',
            'constructor_args' => [
                'origin'          => 'hackcheck',
                'suspicious_user' => $user
            ]
        );
    }
}
close($passwd);
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