├── .gitattributes
├── docs
├── virus-files.zip
└── svs-report2vr.png
├── README.md
├── svs.php
└── LICENSE
/.gitattributes:
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1 | # Auto detect text files and perform LF normalization
2 | * text=auto
3 |
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/docs/virus-files.zip:
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https://raw.githubusercontent.com/mSnus/simple-virus-scanner/HEAD/docs/virus-files.zip
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/docs/svs-report2vr.png:
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https://raw.githubusercontent.com/mSnus/simple-virus-scanner/HEAD/docs/svs-report2vr.png
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/README.md:
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1 | # simple virus scanner
2 | PHP file scanner for known virus patterns of simple viruses for Bitrix, WordPress and Joomla
3 |
4 | Надеюсь, этот сканер поможет людям разобраться хотя бы с простыми вирусами на их сайтах!
5 | Для запуска достаточно закачать его к себе на хостинг и запустить. Так как он ничего не лечит,
6 | ничего никуда не отправляет и не пишет на диск, можно не бояться, что он что-то поломает.
7 |
8 | ## Это очень простой сканер
9 |
10 | - Здесь нет сложной эвристики, используются простые regexp-ы по нескольким известным паттернам вирусов
11 | - Сканер ничего не лечит, только выдаёт предупреждения согласно своей системе оценки
12 | - Сканер может выдавать предупреждения по вполне нормальным файлам.
13 |
14 | Оценивать реальную опасность/зараженность должен грамотный специалист. Лечить зараженные файлы всё равно придётся вручную.
15 |
16 | ## Сканер работает как из веб, так и из командой строки
17 |
18 | Для командной строки можно использовать ключи:
19 |
20 | **--html** - выдавать отчёт в html (по умолчанию для командной строки - plain text)
21 |
22 | **--root=<путь в кавычках>** - начальная директория для сканирования
23 |
24 | **--nosort** - не сортировать результаты по оценке опасности (останется сортировка по пути, что иногда удобнее)
25 |
26 | **--m=<число>** - минимальная оценка опасности, при которой объект попадёт в отчёт (по умолчанию m=6)
27 |
28 | Пример: > php svs.php --html --m=25 --nosort
29 |
30 | Аналогичго можно использовать параметры в URL для веб:
31 |
32 | plaintext - выдавать отчёт в plain text
33 | nosort - не сортировать результаты по оценке опасности (останется сортировка по пути, что иногда удобнее)
34 | m=<число> - минимальная оценка опасности, при которой объект попадёт в отчёт (по умолчанию m=6)
35 |
36 | Пример: http://site/svs.php?plaintext&m=25&nosort
37 |
38 | ## Константы
39 |
40 | В начале кода заведены константы, которыми можно подстроить :
41 |
42 | **define('SVS_FILE_EXTENSIONS', "php,inc");** - анализируемые расширения
43 |
44 | **define('SVS_FORBIDDEN_DIRS', "img,images,upload,tmp,assets");** - директории, в которых не должно быть php-файлов или include файлов оттуда
45 |
46 | **define('SVS_MAX_FILESIZE', 2100000);** - максимальный размер анализируемого файла
47 |
48 | 
49 |
50 | ### Вирусы для дальнейшего исследования
51 |
52 | Файл с образцами вирусных файлов - /docs/virus-files.zip, пароль на архив - svs
53 |
54 |
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/svs.php:
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1 | isWeb = $isWeb;
33 | }
34 |
35 | public function rainbow($text)
36 | {
37 | if (!$this->isWeb) return $text;
38 |
39 | $text = "$text";
40 |
41 | return $text;
42 | }
43 |
44 | public function reset()
45 | {
46 | $this->rainbowCnt = 0;
47 | }
48 |
49 | public function inc()
50 | {
51 | if ($this->rainbowCnt < count($this->rainbowColors) - 1) {
52 | $this->rainbowCnt++;
53 | } else {
54 | $this->rainbowCnt = 0;
55 | }
56 | }
57 | }
58 |
59 | class Scanner
60 | {
61 | var $rootFolder = "";
62 | var $isWeb = true;
63 | var $scanList = [];
64 | var $forbiddenDirs = [];
65 | var $scanExtentions = [];
66 | private $selfSize = 0;
67 | private $selfCRC = "";
68 | private $totalFilesScanned = 0;
69 | private $totalFilesSuspicious = 0;
70 | private $totalFilesExcluded = 0;
71 | var $noSort = false;
72 |
73 | private $minScore = 6;
74 |
75 | public function __construct($rootFolder = __DIR__)
76 | {
77 | $this->rootFolder = $rootFolder;
78 | $this->isWeb = (php_sapi_name() !== 'cli');
79 | $options = getopt('', ['html::', 'm::', 'root::', 'nosort::']);
80 |
81 | if (isset($options['html'])) $this->isWeb = true; //override with --html command line switch
82 | if (isset($_GET['plaintext'])) $this->isWeb = false; //override with URL parameter
83 |
84 | if (isset($options['root'])) $this->rootFolder = $options['root']; //override with --root command line switch
85 |
86 | if (isset($options['nosort'])) $this->noSort = true; //override with --nosort command line switch or parameter
87 | if (isset($_GET['nosort'])) $this->noSort = true;
88 |
89 | if (isset($options['m'])) $this->minScore = $options['m']; //set minimal reporting score via command line with --m=5 switch
90 | if (isset($_GET['m'])) $this->minScore = $_GET['m']; //set minimal reporting score via URL
91 |
92 | $this->selfSize = filesize(__FILE__);
93 | $this->selfCRC = crc32(file_get_contents(__FILE__));
94 |
95 | $this->forbiddenDirs = explode(",", SVS_FORBIDDEN_DIRS);
96 |
97 | $exts = explode(",", SVS_FILE_EXTENSIONS);
98 | $this->scanExtentions = "~\.(" . join("|", $exts) . ")$~i";
99 | }
100 |
101 | /**
102 | * Выводит сообщение об ошибке
103 | */
104 | public function error($errorText)
105 | {
106 | if ($this->isWeb) {
107 | echo "ERROR:
" . $errorText . "
";
108 | } else {
109 | echo ">> ERROR: " . $errorText . "\n";
110 | }
111 | }
112 |
113 | /**
114 | * Выводит строку в правильном формате в зависимости от окружения
115 | */
116 | private function out($message)
117 | {
118 | if ($this->isWeb) {
119 | echo $message . "
";
120 | } else {
121 | echo $message . "\n";
122 | }
123 | }
124 |
125 | /**
126 | * Строит массив с файлами для последующего сканирования
127 | */
128 | public function buildScanList($startDir = "", $level = 0)
129 | {
130 | // $this->out($startDir);
131 | $dirToScan = ($startDir != "") ? $this->rootFolder . "/" . $startDir : $this->rootFolder;
132 | if ($handle = opendir($dirToScan)) {
133 | $exts = $this->scanExtentions;
134 |
135 | $arrDirs = [];
136 | $arrFiles = [];
137 |
138 | while (false !== ($entry = readdir($handle))) {
139 | if ($entry != "." && $entry != "..") {
140 | if (is_dir($dirToScan . "/" . $entry) && !is_link($dirToScan . "/" . $entry)) {
141 | $arrDirs[] = $entry;
142 | } else {
143 | //extension is in the list and the file is not self
144 | if (preg_match($exts, $entry) > 0 && $dirToScan . "/" . $entry !== __FILE__) {
145 | $arrFiles[] = $entry;
146 | }
147 | }
148 | }
149 | }
150 |
151 | closedir($handle);
152 |
153 | asort($arrDirs);
154 | asort($arrFiles);
155 |
156 | foreach ($arrFiles as $entry) {
157 | $dirPath = ($startDir != "") ? $startDir : "/";
158 | $this->totalFilesScanned++;
159 | $id = $this->totalFilesScanned;
160 | $this->scanList[$id]['dir'] = $dirPath;
161 | $this->scanList[$id]['name'] = $entry;
162 | $this->scanList[$id]['score'] = 0;
163 | $this->scanList[$id]['level'] = $level;
164 | $this->scanList[$id]['diag'] = [];
165 | }
166 |
167 | unset($arrFiles);
168 |
169 | foreach ($arrDirs as $entry) {
170 | $this->buildScanList($startDir . "/" . $entry, $level + 1);
171 | }
172 | } else {
173 | $this->error("Cannot open root folder '" . $this->rootFolder . "'");
174 | }
175 | }
176 |
177 | /**
178 | * Проверяет путь и имя файла на совпадение со списком файлов-исключений
179 | */
180 | function isExclusion($dirPath, $fileName)
181 | {
182 | $fullPath = ($dirPath == "/") ? $this->rootFolder : $this->rootFolder . $dirPath;
183 | $file = $fullPath . "/" . $fileName;
184 | $arrWhitelist = ['snusminer.php',
185 | '/administrator/components/com_akeeba/BackupEngine/Archiver/Jpa.php',
186 | '/administrator/components/com_akeeba/BackupEngine/Archiver/Jps.php',
187 | '/administrator/components/com_akeeba/BackupEngine/Archiver/Zip.php',
188 | '/administrator/components/com_akeeba/BackupEngine/Postproc/Sugarsync.php',
189 | '/administrator/components/com_akeeba/restore.php',
190 | '/administrator/components/com_akeeba/View/Upload/tmpl/default.php',
191 | '/administrator/components/com_akeeba/View/Upload/tmpl/done.php',
192 | '/administrator/components/com_akeeba/View/Upload/tmpl/error.php',
193 | '/administrator/components/com_akeeba/View/Upload/tmpl/uploading.php',
194 | '/administrator/components/com_finder/helpers/indexer/stemmer/fr.php',
195 | '/administrator/components/com_joomlaupdate/views/upload/tmpl/captive.php',
196 | '/administrator/components/com_media/views/images/tmpl/default.php',
197 | '/image_uploader/localization.php',
198 | '/libraries/idna_convert/idna_convert.class.php',
199 | '/libraries/vendor/joomla/string/src/phputf8/native/core.php',
200 | '/modules/fileman/classes/general/sticker.php',
201 | '/modules/iblock/admin/iblock_edit.php',
202 | '/modules/iblock/admin/iblock_element_admin.php',
203 | '/modules/iblock/admin/iblock_list_admin.php',
204 | '/modules/iblock/admin/templates/iblock_subelement_list.php',
205 | '/modules/iblock/classes/general/comp_pricetools.php',
206 | '/modules/main/admin/group_edit.php',
207 | '/modules/main/admin/restore.php',
208 | '/modules/main/admin/site_checker.php',
209 | '/modules/main/classes/general/backup.php',
210 | '/modules/main/classes/general/cache_files.php',
211 | '/modules/main/classes/general/cache_html.php',
212 | '/modules/main/classes/general/punycode.php',
213 | '/modules/main/classes/general/usertypedbl.php',
214 | '/modules/main/classes/general/virtual_io_filesystem.php',
215 | '/modules/main/classes/general/zip.php',
216 | '/modules/main/lib/io/directory.php',
217 | '/modules/main/tools.php',
218 | 'administrator/components/com_joomlaupdate/restore.php',
219 | 'modules/defa.socialmediaposter/classes/general/idna_convert.class.php',
220 | ];
221 |
222 | $isEx = false;
223 |
224 | //себя тоже добавляем в список исключений
225 | if ($fileName == __FILE__) {
226 | $isEx = true;
227 | }
228 |
229 | foreach($arrWhitelist as $wl) {
230 | if (strstr($file, $wl) !== false) {
231 | $isEx = true;
232 | break;
233 | }
234 | }
235 |
236 | return $isEx;
237 | }
238 |
239 | /**
240 | * Сканируем файл на опасные факторы
241 | */
242 |
243 | function scanFile($id)
244 | {
245 | //reset rainbow counter
246 | $rbc = new RainbowCounter($this->isWeb);
247 |
248 | /* no php files should be placed in forbidden dirs */
249 | $entry = &$this->scanList[$id];
250 | $dirPath = $entry['dir'];
251 | $fileName = $entry['name'];
252 |
253 | //script files should not be placed in suspicious directories
254 | foreach ($this->forbiddenDirs as $fd) {
255 | if (preg_match("~\/" . $fd . "[/$]~i", $dirPath) > 0) {
256 | $entry['score'] = $entry['score'] + 50;
257 | $entry['diag']['susp_dir'] = $rbc->rainbow('suspicious dir \''.$fd.'\'');
258 | break;
259 | }
260 | }
261 | $rbc->inc();
262 |
263 |
264 | $contents = "";
265 | $fullPath = ($dirPath == "/") ? $this->rootFolder : $this->rootFolder . $dirPath;
266 | if (filesize($fullPath . "/" . $fileName) < SVS_MAX_FILESIZE) {
267 | $contents = file_get_contents($fullPath . "/" . $fileName);
268 | } else {
269 | $this->error("File too big: " . $fullPath . "/" . $fileName. " (". filesize($fullPath . "/" . $fileName). ")");
270 | $entry['score'] = $entry['score'] + 50;
271 | $entry['diag']['too_big'] = $rbc->rainbow('file too big');
272 | return true;
273 | }
274 | $rbc->inc();
275 |
276 | if ($contents === false) {
277 | $this->error("Cannot read " . $fullPath . "/" . $fileName);
278 | $entry['score'] = $entry['score'] + 50;
279 | $entry['diag']['cant_read'] = $rbc->rainbow('can\'t read');
280 | return true;
281 | }
282 | $rbc->inc();
283 |
284 |
285 | //escaped sequence like \x47\x4c\x4f\x42\x41
286 | if (preg_match('~(\\\x[a-z0-9]{2,3}){3,}~', $contents) > 0) {
287 | $entry['score'] = $entry['score'] + 10;
288 | $entry['diag']['esc_seq'] = $rbc->rainbow('escape sequence');
289 | }
290 | $rbc->inc();
291 |
292 | //muted call to variable like @${"
293 | if (preg_match('~@\$\{\"~', $contents) > 0) {
294 | $entry['score'] = $entry['score'] + 30;
295 | $entry['diag']['weird_constr'] = $rbc->rainbow('weird construction');
296 | }
297 | $rbc->inc();
298 |
299 |
300 | //very long letter & digit string more than 1 time
301 | $matches = [];
302 | $cnt = preg_match_all('~[a-zA-Z0-9]{35,}~', $contents);
303 | if ($cnt > 1) {
304 | $entry['score'] = $entry['score'] + 5 + floor($cnt / 5)*5;
305 | $entry['diag']['long_id'] = $rbc->rainbow('long identifier (x' . $cnt . ')');
306 | }
307 | $rbc->inc();
308 |
309 | //usage of base64_decode
310 | if (preg_match('~base64_decode~', $contents) > 0) {
311 | $entry['score'] = $entry['score'] + 10;
312 | $entry['diag']['base64'] = $rbc->rainbow('base64_decode()');
313 | }
314 | $rbc->inc();
315 |
316 | //usage of php_uname
317 | if (preg_match('~php_uname~', $contents) > 0) {
318 | $entry['score'] = $entry['score'] + 20;
319 | $entry['diag']['php_uname'] = $rbc->rainbow('php_uname()');
320 | }
321 | $rbc->inc();
322 |
323 | //usage of chr() function like chr(56)
324 | $matches = [];
325 | $cnt = preg_match_all('~chr\(\d{2,3}\)~', $contents, $matches);
326 | if ($cnt > 0) {
327 | $entry['score'] = $entry['score'] + 5 + floor($cnt / 10)*5;
328 | $entry['diag']['chr'] = $rbc->rainbow('chr() (x' . $cnt . ')');
329 | }
330 | $rbc->inc();
331 |
332 | //usage of shell_exec() function
333 | if (preg_match('~shell_exec\s*\(~', $contents) > 0) {
334 | $entry['score'] = $entry['score'] + 50;
335 | $entry['diag']['shell_exec'] = $rbc->rainbow('shell_exec()');
336 | }
337 | $rbc->inc();
338 |
339 | //usage of chmod() function
340 | $matches = [];
341 | $cnt = preg_match_all('~chmod\s*\(~', $contents, $matches);
342 | if ($cnt > 0) {
343 | $entry['score'] = $entry['score'] + 10;
344 | $entry['diag']['chmod'] = $rbc->rainbow('chmod()');
345 | }
346 | $rbc->inc();
347 |
348 | //weird variable names like $xwbl209{30}
349 | if (preg_match('~\$[a-zA-Z0-9]{5,}\{\d{2}}~', $contents) > 0) {
350 | $entry['score'] = $entry['score'] + 30;
351 | $entry['diag']['weird_var'] = $rbc->rainbow('weird variables');
352 | }
353 | $rbc->inc();
354 |
355 |
356 | //usage of hex codes several times like 0x0080
357 | $matches = [];
358 | $cnt = preg_match_all('~0x[0-9A-F]{4}~', $contents, $matches);
359 | if ($cnt > 3) {
360 | $entry['score'] = $entry['score'] + 5 + floor($cnt / 20);
361 | $entry['diag']['hex'] = $rbc->rainbow('hex codes (x' . $cnt . ")");
362 | }
363 | $rbc->inc();
364 |
365 | //usage of eval() function
366 | $matches = [];
367 | $cnt = preg_match_all('~eval\(~', $contents, $matches);
368 | if ($cnt > 0) {
369 | $entry['score'] = $entry['score'] + 10 + floor($cnt / 5)*5;
370 | $entry['diag']['eval'] = $rbc->rainbow('eval()');
371 | }
372 | $rbc->inc();
373 |
374 | //usage of fileperms() function
375 | $matches = [];
376 | $cnt = preg_match_all('~fileperms\(~', $contents, $matches);
377 | if ($cnt > 0) {
378 | $entry['score'] = $entry['score'] + 10 + floor($cnt / 5)*5;
379 | $entry['diag']['fileperms'] = $rbc->rainbow('fileperms()');
380 | }
381 | $rbc->inc();
382 |
383 |
384 | //usage of gzinflate() function
385 | if (preg_match('~gzinflate\(~', $contents) > 0) {
386 | $entry['score'] = $entry['score'] + 10;
387 | $entry['diag']['gzinflate'] = $rbc->rainbow('gzinflate()');
388 | }
389 | $rbc->inc();
390 |
391 | //usage of register_shutdown_function() function
392 | if (preg_match('~register_shutdown_function\(~', $contents) > 0) {
393 | $entry['score'] = $entry['score'] + 5;
394 | $entry['diag']['register_shutdown_function'] = $rbc->rainbow('register_shutdown_function()');
395 | }
396 | $rbc->inc();
397 |
398 | //usage of goto function
399 | if (preg_match('~[^"a-zA-Z0-9_$]goto\s~', $contents) > 0) {
400 | $entry['score'] = $entry['score'] + 20;
401 | $entry['diag']['goto'] = $rbc->rainbow('goto');
402 | }
403 | $rbc->inc();
404 |
405 | //usage of upload form
406 | if (preg_match('~enctype\s*=\s*[\'"]multipart/form-data[\'"]~i', $contents) > 0) {
407 | $entry['score'] = $entry['score'] + 5;
408 | $entry['diag']['upload'] = $rbc->rainbow('upload form');
409 | }
410 | $rbc->inc();
411 |
412 | //include from $_GET
413 | if (preg_match('~include\s*\([^;]*\$_GET~Uis', $contents) > 0) {
414 | $entry['score'] = $entry['score'] + 50;
415 | $entry['diag']['include_get'] = $rbc->rainbow('include from $_GET');
416 | }
417 | $rbc->inc();
418 |
419 | //script files should not be placed in suspicious directories
420 | foreach ($this->forbiddenDirs as $fd) {
421 | if (preg_match("~include\s*\([^;]*\/".$fd."[^a-zA-Z0-9]~is", $contents) > 0) {
422 | $entry['score'] = $entry['score'] + 50;
423 | $entry['diag']['susp_include'] = $rbc->rainbow('include in \''.$fd.'\'');
424 | break;
425 | }
426 |
427 |
428 | }
429 | $rbc->inc();
430 |
431 | //usage of $USER->Authorize() function with int parameter
432 | if (preg_match('~\$USER->Authorize\([^\$]~', $contents) > 0) {
433 | $entry['score'] = $entry['score'] + 50;
434 | $entry['diag']['authorize'] = $rbc->rainbow('authorize()');
435 | }
436 | $rbc->inc();
437 |
438 |
439 |
440 |
441 | /* counting totals */
442 |
443 | //more than 2 alert types
444 | if (count($entry['diag']) > 2) {
445 | $entry['score'] = $entry['score'] + 20;
446 | }
447 |
448 | $entry['exclusion'] = $this->isExclusion($dirPath, $fileName);
449 | }
450 |
451 |
452 | /**
453 | * Запускает сканирование каждого файла в списке
454 | */
455 | public function scanFiles()
456 | {
457 | foreach ($this->scanList as $id => $entry) {
458 | $this->scanFile($id);
459 | }
460 | }
461 |
462 | /**
463 | * Используется для отладки
464 | */
465 | private function pre($var, $export = false)
466 | {
467 | if ($this->isWeb) echo ("
");
468 |
469 | if ($export) {
470 | var_export($var);
471 | } else {
472 | $this->out($var);
473 | }
474 |
475 | if ($this->isWeb) echo ("");
476 | }
477 |
478 | /**
479 | * Сортирует список сканирования
480 | */
481 | public function sortScanList(){
482 | global $noSort;
483 | $noSort = $this->noSort;
484 |
485 | function comp1($a, $b){
486 | global $noSort;
487 | if ($a["exclusion"] || $b["exclusion"] ) {
488 | if ($a["exclusion"] && $b["exclusion"]) {
489 | if ($noSort) return 0;
490 | return ($a["score"] > $b["score"]) ? -1 : 1;
491 | } else {
492 | return 1;
493 | }
494 | } else {
495 | if ($noSort) return 0;
496 | if ($a["score"] == $b["score"]) return 0;
497 | return ($a["score"] > $b["score"]) ? -1 : 1;
498 | }
499 | }
500 |
501 | usort($this->scanList, "comp1");
502 | }
503 |
504 | /**
505 | * Выводит отчёт по результатам сканирования
506 | */
507 | public function printScanList()
508 | {
509 | $marker = $this->isWeb ? "•" : "+";
510 |
511 | $this->out('Minimal reporting score: '.$this->minScore);
512 |
513 | if ($this->isWeb) {
514 | ob_start();
515 | echo ("
516 |
517 | SVS anti-virus file scanner
518 |
566 |
567 |
568 |
569 |
570 | | FILE |
571 | SCORE |
572 | ALERTS |
573 |
574 | ");
575 | } else {
576 | $this->out("-- Running SVS anti-virus file scanner --");
577 | }
578 |
579 | foreach ($this->scanList as $entry) {
580 | $dir = $entry['dir'];
581 | $dirname = ($dir == "/" || $dir == "") ? "/" : substr($dir, 1) . "/";
582 | $dirname = $this->isWeb ? "" . $dirname . "" : "" . $dirname . "";
583 |
584 |
585 | if ($entry['score'] > $this->minScore) {
586 | $markerCount = floor($entry['score'] / 10);
587 | if ($markerCount > 10) $markerCount = 10;
588 |
589 | if ($this->isWeb) {
590 | echo ("
591 |
592 | | $dirname" . $entry['name'] . " |
593 | " . (($entry['exclusion']) ?
594 | " X" :
595 | "". str_repeat("$marker", $markerCount) . "") .
596 | " [".$entry['score']."]
597 | |
598 | " . join(", ", $entry['diag']) . " |
599 |
600 | ");
601 | ob_flush();
602 | } else {
603 | $name = $entry['name'];
604 | $this->out((($entry['exclusion']) ? "X " : str_repeat("$marker", $markerCount)) . " [".$entry['score']."] " . $dirname . $name .
605 | " [" . join(", ", $entry['diag']) . "]");
606 | }
607 |
608 | if ($entry['exclusion']) {
609 | $this->totalFilesExcluded++;
610 | } else {
611 | $this->totalFilesSuspicious++;
612 | }
613 | }
614 |
615 | }
616 |
617 | if ($this->isWeb) {
618 | echo ("
");
619 | ob_end_flush();
620 | }
621 |
622 |
623 |
624 | $this->out("Total scanned files: " . $this->totalFilesScanned);
625 | $this->out("Total suspicious files: " . $this->totalFilesSuspicious." + ".$this->totalFilesExcluded." excluded.");
626 | $this->out("Reported by SVS v.".SVS_VERSION." on " . date("Y-m-d H:i"));
627 | }
628 | }
629 |
630 | $scanner = new Scanner();
631 | $scanner->buildScanList();
632 | $scanner->scanFiles();
633 | $scanner->sortScanList();
634 | $scanner->printScanList();
635 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | GNU GENERAL PUBLIC LICENSE
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555 | permission to link or combine any covered work with a work licensed
556 | under version 3 of the GNU Affero General Public License into a single
557 | combined work, and to convey the resulting work. The terms of this
558 | License will continue to apply to the part which is the covered work,
559 | but the special requirements of the GNU Affero General Public License,
560 | section 13, concerning interaction through a network will apply to the
561 | combination as such.
562 |
563 | 14. Revised Versions of this License.
564 |
565 | The Free Software Foundation may publish revised and/or new versions of
566 | the GNU General Public License from time to time. Such new versions will
567 | be similar in spirit to the present version, but may differ in detail to
568 | address new problems or concerns.
569 |
570 | Each version is given a distinguishing version number. If the
571 | Program specifies that a certain numbered version of the GNU General
572 | Public License "or any later version" applies to it, you have the
573 | option of following the terms and conditions either of that numbered
574 | version or of any later version published by the Free Software
575 | Foundation. If the Program does not specify a version number of the
576 | GNU General Public License, you may choose any version ever published
577 | by the Free Software Foundation.
578 |
579 | If the Program specifies that a proxy can decide which future
580 | versions of the GNU General Public License can be used, that proxy's
581 | public statement of acceptance of a version permanently authorizes you
582 | to choose that version for the Program.
583 |
584 | Later license versions may give you additional or different
585 | permissions. However, no additional obligations are imposed on any
586 | author or copyright holder as a result of your choosing to follow a
587 | later version.
588 |
589 | 15. Disclaimer of Warranty.
590 |
591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599 |
600 | 16. Limitation of Liability.
601 |
602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610 | SUCH DAMAGES.
611 |
612 | 17. Interpretation of Sections 15 and 16.
613 |
614 | If the disclaimer of warranty and limitation of liability provided
615 | above cannot be given local legal effect according to their terms,
616 | reviewing courts shall apply local law that most closely approximates
617 | an absolute waiver of all civil liability in connection with the
618 | Program, unless a warranty or assumption of liability accompanies a
619 | copy of the Program in return for a fee.
620 |
621 | END OF TERMS AND CONDITIONS
622 |
623 | How to Apply These Terms to Your New Programs
624 |
625 | If you develop a new program, and you want it to be of the greatest
626 | possible use to the public, the best way to achieve this is to make it
627 | free software which everyone can redistribute and change under these terms.
628 |
629 | To do so, attach the following notices to the program. It is safest
630 | to attach them to the start of each source file to most effectively
631 | state the exclusion of warranty; and each file should have at least
632 | the "copyright" line and a pointer to where the full notice is found.
633 |
634 |
635 | Copyright (C)
636 |
637 | This program is free software: you can redistribute it and/or modify
638 | it under the terms of the GNU General Public License as published by
639 | the Free Software Foundation, either version 3 of the License, or
640 | (at your option) any later version.
641 |
642 | This program is distributed in the hope that it will be useful,
643 | but WITHOUT ANY WARRANTY; without even the implied warranty of
644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 | GNU General Public License for more details.
646 |
647 | You should have received a copy of the GNU General Public License
648 | along with this program. If not, see .
649 |
650 | Also add information on how to contact you by electronic and paper mail.
651 |
652 | If the program does terminal interaction, make it output a short
653 | notice like this when it starts in an interactive mode:
654 |
655 | Copyright (C)
656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 | This is free software, and you are welcome to redistribute it
658 | under certain conditions; type `show c' for details.
659 |
660 | The hypothetical commands `show w' and `show c' should show the appropriate
661 | parts of the General Public License. Of course, your program's commands
662 | might be different; for a GUI interface, you would use an "about box".
663 |
664 | You should also get your employer (if you work as a programmer) or school,
665 | if any, to sign a "copyright disclaimer" for the program, if necessary.
666 | For more information on this, and how to apply and follow the GNU GPL, see
667 | .
668 |
669 | The GNU General Public License does not permit incorporating your program
670 | into proprietary programs. If your program is a subroutine library, you
671 | may consider it more useful to permit linking proprietary applications with
672 | the library. If this is what you want to do, use the GNU Lesser General
673 | Public License instead of this License. But first, please read
674 | .
675 |
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