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usr/local/cpanel/scripts/hackcheck 0000755 00000006024 14720427021 0013233 0 ustar 00 #!/usr/local/cpanel/3rdparty/bin/perl # cpanel - scripts/hackcheck Copyright 2022 cPanel, L.L.C. # 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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