5 * @author Roland Haeder <webmaster@shipsimu.org>
7 * @copyright Copyright (c) 2009 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'] = array(
43 'cmd=lostpw', // LinPHA
46 // Attacks we should detect and block
47 $GLOBALS['ctracker_get_blacklist'] = array(
49 'union ', ' union', 'insert ',
50 'select ', ' like', 'like ', 'drop ', 'update ',
53 // $GLOBAL/$_SERVER array elements
54 'HTTP_USER_AGENT', 'HTTP_HOST', 'HTTP_PHP', '_SESSION', 'CFG_ROOT',
55 'DOCUMENT_ROOT', '_SERVER',
58 '/environ', 'etc/shadow', 'etc/gshadow', 'etc/passwd', 'etc/group',
59 'etc/./shadow', 'etc/./gshadow', 'etc/./passwd', 'etc/./group',
60 '.htaccess', '.htpasswd', '.htgroup', '.history', 'bash_history',
63 // Other Linux/FreeBSD/??? programs (sometimes with space)
64 'traceroute ', 'ping ', 'bin/xterm', 'bin/./xterm', 'lsof ',
65 'telnet ', 'wget ', 'bin/perl', 'bin/id', 'uname\x20', 'uname ',
66 'killall', 'diff ', 'kill ', 'locate ', 'grep ', 'vi ', 'mv ',
67 'rmdir ', 'mcd ', 'mrd ', 'rm ', ' mcd', ' mrd', ' rm',
68 'passwd ', ' passwd', 'mdir ', ' mdir', 'cp ', ' cp',
69 'esystem ', 'chr ', ' chr', 'wget ', ' wget', ' cmd',
70 'cmd ', ' rush', 'rush ', ' echr', 'echr ', ' getenv',
71 'getenv', 'reboot ', 'halt ', 'powerdown ',
73 // Other Linux programs (+ brace)
74 'locate(', 'grep(', 'kill(', 'mcd(', 'mrd(', 'rm(', 'mv(', 'rmdir(',
75 'chmod(', 'chmod(', 'chown(', 'chgrp(', 'passwd(', 'vi(', 'cp(',
76 'mdir(', 'system(', 'chr(', 'wget(', 'rush(', 'echr(',
78 // Other Linux programs (+ equal)
79 'mcd=', 'mrd=', 'chmod=', 'chr=', 'rush=', 'echr=',
82 '/etc/', '/bin/', '/sbin/', '/self/', '/proc/', '../../','..//', '././',
83 '/home/ftp', '/home/./ftp', '/home/./www', '/home/www', '/www/virtual/',
87 '/chgrp', '/chown', '/chmod', 'chown ', 'chmod ', 'chgrp ',
89 // Compiler/interpreter
90 'g++ ', 'c++ ', 'cc ', 'bin/./python', 'bin/python', 'bin/tclsh',
91 'bin/./tclsh', 'bin/nasm', 'bin/./nasm', '/perl', 'perl ', 'cmd.exe',
95 'allow_url_fopen', 'allow_url_include', 'auto_prepend_file', 'disable_functions', 'safe_mode',
97 // PHP commands/scripts
98 'fopen', 'fwrite', 'phpinfo()', '\<?', '?\>', 'base64_decode', 'file_put_contents',
99 'set_magic_quotes_runtime', 'set_magic_quotes_runtime', 'display_errors', 'passthru',
101 // Typical PHP script remote-inclusions and typical include file names
102 '.inc.php', '.lib.php', '.class.php', 'config.php', '.inc', '_php',
103 'php_', 'class_', '_class.php', 'db_mysql.inc',
108 // Generic remote inclusion
109 '=http://', '=https://',
111 '=%7BQUOT%7D', '=%5C', '=%22http','=%22ftp','=%22file','=%27http','=%27ftp',
115 'data://', 'tcp://', 'udp://', 'raw://', 'javascript://', 'file://', 'ftp://',
118 'nigga(', ' nigga', 'nigga ', 'starhack', 'busca',
121 ' style=', 'style =',
122 'overflow:auto', 'overflow: auto',
123 'overflow :auto', 'overflow : auto',
124 'display:hidden', 'display: hidden',
125 'display :hidden', 'display : hidden',
126 'height:0px', 'height: 0px','height:1px', 'height: 1px',
127 'width:0px', 'width: 0px','width:1px', 'width: 1px',
129 // Uncommon user websites
130 '~root', '~ftp', '~nobody',
132 // Windows XP (?) hacks
133 'xp_enumdsn', 'xp_availablemedia', 'xp_filelist', 'xp_cmdshell',
135 // Attempts to insert links into a badly secured URL
138 // Request header being inserted
141 // /proc/ and other forbidden paths
144 // MySQL internal functions
147 // @TODO Misc/unsorted
148 'cgi-', '.eml', '$_request', '$_get', '$request', '$get', '.system',
149 '&aim', 'new_password', '&icq', '.conf', 'motd ', 'HTTP/1.',
150 'window.open', 'img src', 'img src', '.jsp', 'servlet',
151 'wwwacl', '.js', '.jsp', 'server-info', 'server-status',
152 'secure_site, ok', 'chunked', 'org.apache', '/servlet/con',
153 '<script', 'mod_gzip_status', '.system', 'http_',
154 'uol.com', ',0x', '(0x'
157 // Block these words found in POST requests
158 $GLOBALS['ctracker_post_blacklist'] = array(
159 // This line is for detecting hidden link spam in wikis, forums, guestbooks, etc.
160 ' style=', 'overflow:auto', 'height:1px', 'width:1px', 'display:hidden', 'style.display',
162 // "Common" login names from VHCS exploiters ;-)
163 'starhack', 'DeLiMehmet', 'hisset', 'Hisset', 'delimert', 'MecTruy'
166 // Init more elements
167 $GLOBALS['ctracker_post_track'] = '';
168 $GLOBALS['ctracker_checked_get'] = '';
169 $GLOBALS['ctracker_checked_post'] = '';
170 $GLOBALS['ctracker_checked_ua'] = '';
174 function isCrackerTrackerWormDetected () {
175 // Check against the whole list
176 $GLOBALS['ctracker_checked_get'] = urldecode(str_ireplace($GLOBALS['ctracker_get_blacklist'], '*', str_replace(array('//', '/./'), array('/', '/'), crackerTrackerQueryString())));
177 $GLOBALS['ctracker_checked_ua'] = urldecode(str_ireplace($GLOBALS['ctracker_get_blacklist'], '*', str_replace(array('//', '/./'), array('/', '/'), crackerTrackerUserAgent())));
180 * If it differs to original and the *whole* request string is not in
181 * whitelist then blog the attempt.
185 $GLOBALS['ctracker_checked_get'] != crackerTrackerQueryString() && (!in_array(crackerTrackerQueryString(), $GLOBALS['ctracker_whitelist']))
187 $GLOBALS['ctracker_checked_ua'] != crackerTrackerUserAgent()
190 //* DEBUG-DIE: */ die('isWorm='.intval($isWorm).PHP_EOL.'get="'.$GLOBALS['ctracker_checked_get'].'"'.PHP_EOL.'"'.crackerTrackerQueryString().'"'.PHP_EOL.'ua="'.$GLOBALS['ctracker_checked_ua'].'"'.PHP_EOL.'"'.crackerTrackerUserAgent().'"'.PHP_EOL);
197 function isCrackerTrackerPostAttackDetected () {
198 // Implode recursive the whole $_POST array
199 $GLOBALS['ctracker_post_track'] = urldecode(implode_r('&', $_POST));
201 // Check for suspicious POST data
202 $GLOBALS['ctracker_checked_post'] = urldecode(str_ireplace($GLOBALS['ctracker_post_blacklist'], '*', str_replace(array('//', '/./'), array('/', '/'), $GLOBALS['ctracker_post_track'])));
205 return ((isCrackerTrackerWormDetected()) || ($GLOBALS['ctracker_checked_post'] != $GLOBALS['ctracker_post_track']));
208 // Prepares a mail and send it out
209 function sendCrackerTrackerMail () {
211 crackerTrackerLogAttack();
214 $mail = 'Attack detected:
215 -----------------------------------------------------
216 Remote-IP : ' . determineCrackerTrackerRealRemoteAddress() . '
217 User-Agent : ' . crackerTrackerUserAgent() . '
218 Request-string : ' . crackerTrackerQueryString() . '
219 Filtered string : ' . $GLOBALS['ctracker_checked_get'] . '
220 Server : ' . crackerTrackerServerName() . '
221 Script : ' . crackerTrackerScriptName() . '
222 Referrer : ' . crackerTrackerReferer() . '
223 -----------------------------------------------------
227 crackerTrackerSendMail($mail);
233 // Sends the ticket emails out
234 function sendCrackerTrackerTicketMails () {
235 // Load user template
236 $mail = crackerTrackerLoadEmailTemplate('user_add_ticket', $GLOBALS['ctracker_last_ticket']);
238 // Send email to the user
239 crackerTrackerSendMail($mail, $GLOBALS['ctracker_last_ticket']['ctracker_ticket_email'], getCrackerTrackerLocalized('user_add_ticket_subject'));
241 // Load webmaster template
242 $mail = crackerTrackerLoadEmailTemplate('webmaster_add_ticket', $GLOBALS['ctracker_last_ticket'], getCrackerTrackerConfig('ctracker_language'));
244 // Send email to the user
245 crackerTrackerSendMail($mail, NULL, getCrackerTrackerLocalized('webmaster_add_ticket_subject'));
249 function crackerTrackerSendMail ($mail, $recipient = NULL, $subject = NULL) {
250 // Construct dummy array
252 'remote_addr' => determineCrackerTrackerRealRemoteAddress(),
253 'proxy_addr' => getenv('REMOTE_ADDR'),
254 'check_worm' => $GLOBALS['ctracker_checked_get'],
255 'server_name' => crackerTrackerServerName()
258 // Only send email if not yet found
259 if (!isCrackerTrackerEntryFound($rowData)) {
260 // Send the email out only in non-debug mode
261 if (isCrackerTrackerDebug()) {
263 print 'Recipient=' . $recipient . '<br />Subject=' . $subject . '<br />Text=<pre>' . $mail . '</pre>';
267 } elseif (!is_null($recipient)) {
268 // Recipient specified
269 return mail($recipient, $subject, $mail, $GLOBALS['ctracker_header']);
270 } elseif (isset($GLOBALS['ctracker_email'])) {
272 return mail($GLOBALS['ctracker_email'], 'CTracker: Attack detected!', $mail, $GLOBALS['ctracker_header']);
274 // Send it the deprecated way with constant
275 return mail(constant('__CTRACKER_EMAIL'), 'CTracker: Attack detected!', $mail, $GLOBALS['ctracker_header']);
277 } elseif (isCrackerTrackerDebug()) {
279 print 'Recipient=' . $recipient . '<br />Subject=' . $subject . '<br />Text=<pre>' . $mail . '</pre>';
286 // Sends a detected POST attack mail
287 function sendCrackerTrackerPostMail () {
289 crackerTrackerLogAttack();
292 $mail = 'POST-Attack detected:
293 -----------------------------------------------------
294 Remote-IP : '.determineCrackerTrackerRealRemoteAddress().'
295 User-Agent : '.crackerTrackerUserAgent().'
296 Request-string : '.crackerTrackerQueryString().'
297 Filtered string : '.$GLOBALS['ctracker_checked_get'].'
298 Server : '.crackerTrackerServerName().'
299 Script : '.crackerTrackerScriptName().'
300 Referrer : '.crackerTrackerReferer().'
301 -----------------------------------------------------
302 POST string : '.$GLOBALS['ctracker_post_track'].'
303 Filtered POST string : '.$GLOBALS['ctracker_checked_post'].'
304 -----------------------------------------------------
308 crackerTrackerSendMail($mail);
314 // Sleeps for a random time and aborts the script
315 function crackerTrackerDie () {
316 // Close database link
317 crackerTrackerCloseDatabaseLink();
319 // Do only sleep if debug/developer mode is not enabled
320 if (!isCrackerTrackerDebug()) {
321 // Sleep a little to waste the attacker's time
322 sleep(mt_rand(10,30));
326 if (isCrackerTrackerDebug()) {
327 // With debug backtrace in debug/developer mode
329 debug_print_backtrace();
337 // Logs the attack attempt
338 function crackerTrackerLogAttack () {
339 // Aquire database link
340 aquireCrackerTrackerDatabaseLink();
342 // By default no proxy is used
345 // Did the attacker use a proxy?
346 if (isCrackerTrackerProxyUsed()) {
351 // Prepare array for database insert
353 'remote_addr' => determineCrackerTrackerRealRemoteAddress(),
354 'proxy_addr' => getenv('REMOTE_ADDR'),
355 'user_agent' => crackerTrackerUserAgent(),
356 'get_data' => crackerTrackerQueryString(),
357 'post_data' => $GLOBALS['ctracker_post_track'],
358 'check_worm' => $GLOBALS['ctracker_checked_get'],
359 'check_post' => $GLOBALS['ctracker_checked_post'],
360 'server_name' => crackerTrackerServerName(),
361 'script_name' => crackerTrackerScriptName(),
362 'referer' => crackerTrackerReferer(),
363 'request_method' => crackerTrackerRequestMethod(),
364 'proxy_used' => $proxyUsed,
365 'first_attempt' => 'NOW()'
368 // Insert the array in database
369 crackerTrackerInsertArray('ctracker_data', $rowData);
372 // Alerts the current user about malicious/suspicious traffic
373 function crackerTrackerAlertCurrentUser () {
374 // Is there some data?
375 if (isset($GLOBALS['ctracker_last_suspicious_entry'])) {
376 // Does the user have a ticket?
377 if (ifCrackerTrackerIpHasTicket()) {
378 // Load "Thank you" template
379 crackerTrackerLoadTemplate('add_ticket_thanks');
380 } elseif ((isset($_POST['ctracker_add_ticket'])) && (!empty($_POST['name'])) && (!empty($_POST['email']))) {
382 addCrackerTrackerTicket($_POST);
384 // Send the email out
385 sendCrackerTrackerTicketMails();
387 // Display the form for new ticket
388 crackerTrackerLoadTemplate('add_ticket');