5 * @author Roland Haeder <webmaster@shipsimu.org>
7 * @copyright Copyright (c) 2009 - 2017 Cracker Tracker Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.shipsimu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 // Initializes all detector arrays
26 function initCrackerTrackerArrays () {
27 // Set error_reporting
28 if (isCrackerTrackerDebug()) {
29 // For debugging purposes, this is fine
30 @error_reporting(E_ALL | E_STRICT);
37 $GLOBALS['ctracker_base_path'] = dirname(dirname(__FILE__));
39 // Whitelist some absolute query strings (see below)
40 $GLOBALS['ctracker_whitelist'] = [
43 'cmd=lostpw', // LinPHA
44 '/css/status_config.php', // MantisBT
45 '/css/common_config.php', // MantisBT
46 '/javascript_config.php', // MantisBT
49 // Attacks we should detect and block
50 $GLOBALS['ctracker_get_blacklist'] = [
52 'union ', ' union', 'insert ',
53 'select ', ' like', 'like ', 'drop ', 'update ',
56 // $GLOBAL/$_SERVER array elements
57 'HTTP_USER_AGENT', 'HTTP_HOST', 'HTTP_PHP', '_SESSION', 'CFG_ROOT',
58 'DOCUMENT_ROOT', '_SERVER',
61 '/environ', 'etc/shadow', 'etc/gshadow', 'etc/passwd', 'etc/group',
62 'etc/./shadow', 'etc/./gshadow', 'etc/./passwd', 'etc/./group',
63 '.htaccess', '.htpasswd', '.htgroup', '.history', 'bash_history',
66 // Other Linux/FreeBSD/??? programs (sometimes with space)
67 'traceroute ', 'ping ', 'bin/xterm', 'bin/./xterm', 'lsof ',
68 'telnet ', 'wget ', 'bin/perl', 'bin/id', 'uname\x20', 'uname ',
69 'killall', 'diff ', 'kill ', 'locate ', 'grep ', 'vi ', 'mv ',
70 'rmdir ', 'mcd ', 'mrd ', 'rm ', ' mcd', ' mrd', ' rm',
71 'passwd ', ' passwd', 'mdir ', ' mdir', 'cp ', ' cp',
72 'esystem ', 'chr ', ' chr', 'wget ', ' wget', ' cmd',
73 'cmd ', ' rush', 'rush ', ' echr', 'echr ', ' getenv',
74 'getenv', 'reboot ', 'halt ', 'powerdown ',
76 // Other Linux programs (+ brace)
77 'locate(', 'grep(', 'kill(', 'mcd(', 'mrd(', 'rm(', 'mv(', 'rmdir(',
78 'chmod(', 'chmod(', 'chown(', 'chgrp(', 'passwd(', 'vi(', 'cp(',
79 'mdir(', 'system(', 'chr(', 'wget(', 'rush(', 'echr(',
81 // Other Linux programs (+ equal)
82 'mcd=', 'mrd=', 'chmod=', 'chr=', 'rush=', 'echr=',
85 '/etc/', '/bin/', '/sbin/', '/self/', '/proc/', '../../','..//', '././',
86 '/home/ftp', '/home/./ftp', '/home/./www', '/home/www', '/www/virtual/',
90 '/chgrp', '/chown', '/chmod', 'chown ', 'chmod ', 'chgrp ',
92 // Compiler/interpreter
93 'bin/g++ ', 'bin/c++ ', 'cc ', 'bin/python', 'bin/python', 'bin/tclsh',
94 'bin/tclsh', 'bin/nasm', '/perl', 'cmd.exe',
98 'allow_url_fopen', 'allow_url_include', 'auto_prepend_file', 'disable_functions', 'safe_mode',
99 'open_basedir', 'suhosin', 'cgi.force_redirect', 'cgi.redirect_status_env',
101 // PHP commands/scripts
102 'fopen', 'fwrite', 'phpinfo()', '\<?', '?\>', 'base64_decode', 'file_put_contents',
103 'set_magic_quotes_runtime', 'set_magic_quotes_runtime', 'display_errors', 'passthru',
105 // Typical PHP script remote-inclusions and typical include file names
106 '.inc.php', '.lib.php', '.class.php', 'config.php', '.inc', '_php',
107 'php_', 'class_', '_class.php', 'db_mysql.inc',
110 '_phplib', '__callbackparam',
112 // Generic remote inclusion
113 '=http://', '=https://', '=php://',
115 '=%7BQUOT%7D', '=%5C', '=%22http','=%22ftp','=%22file','=%27http','=%27ftp',
119 'data://', 'tcp://', 'udp://', 'raw://', 'javascript://', 'file://', 'ftp://',
122 'nigga(', ' nigga', 'nigga ', 'starhack', 'busca',
125 ' style=', 'style =',
126 'overflow:auto', 'overflow: auto',
127 'overflow :auto', 'overflow : auto',
128 'display:hidden', 'display: hidden',
129 'display :hidden', 'display : hidden',
130 'height:0px', 'height: 0px','height:1px', 'height: 1px',
131 'width:0px', 'width: 0px','width:1px', 'width: 1px',
133 // Uncommon user websites
134 '~root', '~ftp', '~nobody',
136 // Windows XP (?) hacks
137 'xp_enumdsn', 'xp_availablemedia', 'xp_filelist', 'xp_cmdshell',
139 // Attempts to insert links into a badly secured URL
142 // Request header being inserted
145 // /proc/ and other forbidden paths
148 // MySQL internal functions
151 // @TODO Misc/unsorted
152 'cgi-', '.eml', '$_request', '$_get', '$request', '$get', '.system',
153 '&aim', 'new_password', '&icq', '.conf', 'motd ', 'HTTP/1.',
154 'window.open', 'img src', 'img src', '.jsp', 'servlet', 'org.apache',
155 'wwwacl', 'server-info', 'server-status', '/servlet/con', 'http_',
156 'secure_site, ok', 'chunked', '<script', 'mod_gzip_status', '.system',
157 'uol.com', ',0x', '(0x', 'INSERT_RANDOM_NUMBER_HERE', 'addtype'
160 // BLock these words found in User-Agent
161 $GLOBALS['ctracker_ua_blacklist'] = [
162 // Compiler/interpreter
163 'bin/g++ ', 'bin/c++ ', 'cc ', 'bin/python', 'bin/python', 'bin/tclsh',
164 'bin/tclsh', 'bin/nasm', '/perl', 'cmd.exe',
165 'nc.exe', 'ftp.exe', 'wget ', 'system(', 'curl ',
168 'allow_url_fopen', 'allow_url_include', 'auto_prepend_file', 'disable_functions', 'safe_mode',
170 // PHP commands/scripts
171 'fopen', 'fwrite', 'phpinfo()', '\<?', '?\>', 'base64_decode', 'file_put_contents',
172 'set_magic_quotes_runtime', 'set_magic_quotes_runtime', 'display_errors', 'passthru',
174 // Typical PHP script remote-inclusions and typical include file names
175 '.inc.php', '.lib.php', '.class.php', 'config.php', '.inc', '_php',
176 'php_', 'class_', '_class.php', 'db_mysql.inc',
179 '_phplib', '__callbackparam',
181 // Request header being inserted
184 // /proc/ and other forbidden paths
188 // BLock these words found in User-Agent
189 $GLOBALS['ctracker_ua_blacklist'] = array(
190 // Compiler/interpreter
191 'bin/g++ ', 'bin/c++ ', 'cc ', 'bin/python', 'bin/python', 'bin/tclsh',
192 'bin/tclsh', 'bin/nasm', '/perl', 'cmd.exe',
193 'nc.exe', 'ftp.exe', 'wget ', 'system(', 'curl ',
196 'allow_url_fopen', 'allow_url_include', 'auto_prepend_file', 'disable_functions', 'safe_mode',
198 // PHP commands/scripts
199 'fopen', 'fwrite', 'phpinfo()', '\<?', '?\>', 'base64_decode', 'file_put_contents',
200 'set_magic_quotes_runtime', 'set_magic_quotes_runtime', 'display_errors', 'passthru',
202 // Typical PHP script remote-inclusions and typical include file names
203 '.inc.php', '.lib.php', '.class.php', 'config.php', '.inc', '_php',
204 'php_', 'class_', '_class.php', 'db_mysql.inc',
207 '_phplib', '__callbackparam',
209 // Request header being inserted
212 // /proc/ and other forbidden paths
216 // Block these words found in POST requests
217 $GLOBALS['ctracker_post_blacklist'] = [
218 // This line is for detecting hidden link spam in wikis, forums, guestbooks, etc.
219 ' style=', 'overflow:auto', 'height:1px', 'width:1px', 'display:hidden', 'style.display',
221 // "Common" login names from VHCS exploiters ;-)
222 'starhack', 'DeLiMehmet', 'hisset', 'Hisset', 'delimert', 'MecTruy'
225 // Also block these requests (mostly you don't want CONNECT to some SMTP sites)
226 $GLOBALS['ctracker_blocked_methods'] = [
230 // Init more elements
231 $GLOBALS['ctracker_post_track'] = '';
232 $GLOBALS['ctracker_checked_get'] = '';
233 $GLOBALS['ctracker_checked_post'] = '';
234 $GLOBALS['ctracker_checked_ua'] = '';
238 function isCrackerTrackerWormDetected () {
239 // Check against the whole list
240 $GLOBALS['ctracker_checked_get'] = urldecode(str_ireplace($GLOBALS['ctracker_get_blacklist'], '*', crackerTrackerQueryString(TRUE)));
241 $GLOBALS['ctracker_checked_ua'] = urldecode(str_ireplace($GLOBALS['ctracker_ua_blacklist'], '*', crackerTrackerUserAgent(TRUE)));
244 * If it differs to original and the *whole* request string is not in
245 * whitelist then blog the attempt.
249 $GLOBALS['ctracker_checked_get'] != crackerTrackerQueryString(TRUE) && (!in_array(crackerTrackerQueryString(TRUE), $GLOBALS['ctracker_whitelist']))
251 $GLOBALS['ctracker_checked_ua'] != crackerTrackerUserAgent(TRUE)
253 isset($GLOBALS['ctracker_blocked_methods'][crackerTrackerRequestMethod()])
256 //* DEBUG-DIE: */ die('isWorm='.intval($isWorm).PHP_EOL.'get='.PHP_EOL.'"'.$GLOBALS['ctracker_checked_get'].'"'.PHP_EOL.'"'.crackerTrackerQueryString().'"'.PHP_EOL.'ua='.PHP_EOL.'"'.$GLOBALS['ctracker_checked_ua'].'"'.PHP_EOL.'"'.crackerTrackerUserAgent().'"'.PHP_EOL);
263 function isCrackerTrackerPostAttackDetected () {
264 // Implode recursive the whole $_POST array
265 $GLOBALS['ctracker_post_track'] = urldecode(implode_r('&', $_POST));
267 // Check for suspicious POST data
268 $GLOBALS['ctracker_checked_post'] = urldecode(str_ireplace($GLOBALS['ctracker_post_blacklist'], '*', crackerTrackerSanitize($GLOBALS['ctracker_post_track'])));
271 return ((isCrackerTrackerWormDetected()) || ($GLOBALS['ctracker_checked_post'] != crackerTrackerSanitize($GLOBALS['ctracker_post_track'])));
274 // Prepares a mail and send it out
275 function sendCrackerTrackerMail () {
277 crackerTrackerLogAttack();
280 $mail = 'Attack detected:
281 -----------------------------------------------------
282 Remote-IP : ' . determineCrackerTrackerRealRemoteAddress() . '
283 User-Agent : ' . crackerTrackerUserAgent() . '
284 Request-string : ' . crackerTrackerQueryString() . '
285 Filtered string : ' . $GLOBALS['ctracker_checked_get'] . '
286 Server : ' . crackerTrackerServerName() . '
287 Script : ' . crackerTrackerScriptName() . '
288 Method : ' . crackerTrackerRequestMethod() . '
289 Referrer : ' . crackerTrackerReferer() . '
290 -----------------------------------------------------
294 crackerTrackerSendMail($mail);
300 // Sends the ticket emails out
301 function sendCrackerTrackerTicketMails () {
302 // Load user template
303 $mail = crackerTrackerLoadEmailTemplate('user_add_ticket', $GLOBALS['ctracker_last_ticket']);
305 // Send email to the user
306 crackerTrackerSendMail($mail, $GLOBALS['ctracker_last_ticket']['ctracker_ticket_email'], getCrackerTrackerLocalized('user_add_ticket_subject'));
308 // Load webmaster template
309 $mail = crackerTrackerLoadEmailTemplate('webmaster_add_ticket', $GLOBALS['ctracker_last_ticket'], getCrackerTrackerConfig('ctracker_language'));
311 // Send email to the user
312 crackerTrackerSendMail($mail, NULL, getCrackerTrackerLocalized('webmaster_add_ticket_subject'));
316 function crackerTrackerSendMail ($mail, $recipient = NULL, $subject = NULL) {
317 // Construct dummy array
319 'remote_addr' => determineCrackerTrackerRealRemoteAddress(),
320 'proxy_addr' => getenv('REMOTE_ADDR'),
321 'check_get' => $GLOBALS['ctracker_checked_get'],
322 'server_name' => crackerTrackerServerName(),
323 'request_method' => crackerTrackerRequestMethod(),
326 // Only send email if not yet found
327 if (!isCrackerTrackerEntryFound($rowData)) {
328 // Send the email out only in non-debug mode
329 if (isCrackerTrackerDebug()) {
331 print 'Recipient=' . $recipient . '<br />Subject=' . $subject . '<br />Text=<pre>' . $mail . '</pre>';
335 } elseif (!is_null($recipient)) {
336 // Recipient specified
337 return mail($recipient, $subject, $mail, $GLOBALS['ctracker_header']);
338 } elseif (isset($GLOBALS['ctracker_email'])) {
340 return mail($GLOBALS['ctracker_email'], 'CTracker: Attack detected!', $mail, $GLOBALS['ctracker_header']);
342 // Send it the deprecated way with constant
343 return mail(constant('__CTRACKER_EMAIL'), 'CTracker: Attack detected!', $mail, $GLOBALS['ctracker_header']);
345 } elseif (isCrackerTrackerDebug()) {
347 print 'Recipient=' . $recipient . '<br />Subject=' . $subject . '<br />Text=<pre>' . $mail . '</pre>';
354 // Sends a detected POST attack mail
355 function sendCrackerTrackerPostMail () {
357 crackerTrackerLogAttack();
360 $mail = 'POST-Attack detected:
361 -----------------------------------------------------
362 Remote-IP : ' . determineCrackerTrackerRealRemoteAddress() . '
363 User-Agent : ' . crackerTrackerUserAgent() . '
364 Request-string : ' . crackerTrackerQueryString() . '
365 Filtered string : ' . $GLOBALS['ctracker_checked_get'] . '
366 Server : ' . crackerTrackerServerName() . '
367 Script : ' . crackerTrackerScriptName() . '
368 Method : ' . crackerTrackerRequestMethod() . '
369 Referrer : ' . crackerTrackerReferer() . '
370 -----------------------------------------------------
371 POST string : ' . $GLOBALS['ctracker_post_track'] . '
372 Filtered POST string : ' . $GLOBALS['ctracker_checked_post'] . '
373 -----------------------------------------------------
377 crackerTrackerSendMail($mail);
383 // Sleeps for a random time and aborts the script
384 function crackerTrackerDie () {
385 // Close database link
386 crackerTrackerCloseDatabaseLink();
388 // Do only sleep if debug/developer mode is not enabled
389 if (!isCrackerTrackerDebug()) {
390 // Sleep a little to waste the attacker's time
391 sleep(mt_rand(10,30));
395 if (isCrackerTrackerDebug()) {
396 // With debug backtrace in debug/developer mode
398 debug_print_backtrace();
406 // Logs the attack attempt
407 function crackerTrackerLogAttack () {
408 // Aquire database link
409 aquireCrackerTrackerDatabaseLink();
411 // By default no proxy is used
414 // Did the attacker use a proxy?
415 if (isCrackerTrackerProxyUsed()) {
420 // Prepare array for database insert
422 'remote_addr' => determineCrackerTrackerRealRemoteAddress(),
423 'proxy_addr' => getenv('REMOTE_ADDR'),
424 'user_agent' => crackerTrackerUserAgent(),
425 'get_data' => crackerTrackerQueryString(),
426 'post_data' => $GLOBALS['ctracker_post_track'],
427 'check_ua' => $GLOBALS['ctracker_checked_ua'],
428 'check_get' => $GLOBALS['ctracker_checked_get'],
429 'check_post' => $GLOBALS['ctracker_checked_post'],
430 'server_name' => crackerTrackerServerName(),
431 'script_name' => crackerTrackerScriptName(),
432 'referer' => crackerTrackerReferer(),
433 'request_method' => crackerTrackerRequestMethod(),
434 'proxy_used' => $proxyUsed,
435 'first_attempt' => 'NOW()'
438 // Insert the array in database
439 crackerTrackerInsertArray('ctracker_data', $rowData);
442 // Alerts the current user about malicious/suspicious traffic
443 function crackerTrackerAlertCurrentUser () {
444 // Is there some data?
445 if (isset($GLOBALS['ctracker_last_suspicious_entry'])) {
446 // Does the user have a ticket?
447 if (ifCrackerTrackerIpHasTicket()) {
448 // Load "Thank you" template
449 crackerTrackerLoadTemplate('add_ticket_thanks');
450 } elseif ((isset($_POST['ctracker_add_ticket'])) && (!empty($_POST['name'])) && (!empty($_POST['email']))) {
452 addCrackerTrackerTicket($_POST);
454 // Send the email out
455 sendCrackerTrackerTicketMails();
457 // Display the form for new ticket
458 crackerTrackerLoadTemplate('add_ticket');