function OptimizeSignatures()
{
global $g_DBShe, $g_FlexDBShe, $gX_FlexDBShe, $gXX_FlexDBShe;
global $g_JSVirSig, $gX_JSVirSig;
global $g_AdwareSig;
global $g_PhishingSig;
global $g_ExceptFlex, $g_SusDBPrio, $g_SusDB;
AI_EXPERT == 2 && ($g_FlexDBShe = array_merge($g_FlexDBShe, $gX_FlexDBShe, $gXX_FlexDBShe));
AI_EXPERT == 1 && ($g_FlexDBShe = array_merge($g_FlexDBShe, $gX_FlexDBShe));
$gX_FlexDBShe = $gXX_FlexDBShe = array();
AI_EXPERT == 2 && ($g_JSVirSig = array_merge($g_JSVirSig, $gX_JSVirSig));
$gX_JSVirSig = array();
$count = count($g_FlexDBShe);
for ($i = 0; $i < $count; $i++) {
if ($g_FlexDBShe[$i] == '[a-zA-Z0-9_]+?\\(\\s*[a-zA-Z0-9_]+?=\\s*\\)') {
$g_FlexDBShe[$i] = '\\((?<=[a-zA-Z0-9_].)\\s*[a-zA-Z0-9_]++=\\s*\\)';
}
if ($g_FlexDBShe[$i] == '([^\\?\\s])\\({0,1}\\.[\\+\\*]\\){0,1}\\2[a-z]*e') {
$g_FlexDBShe[$i] = '(?J)\\.[+*](?<=(?<d>[^\\?\\s])\\(..|(?<d>[^\\?\\s])..)\\)?\\g{d}[a-z]*e';
}
if ($g_FlexDBShe[$i] == '$[a-zA-Z0-9_]\\{\\d+\\}\\s*\\.$[a-zA-Z0-9_]\\{\\d+\\}\\s*\\.$[a-zA-Z0-9_]\\{\\d+\\}\\s*\\.') {
$g_FlexDBShe[$i] = '\\$[a-zA-Z0-9_]\\{\\d+\\}\\s*\\.\\$[a-zA-Z0-9_]\\{\\d+\\}\\s*\\.\\$[a-zA-Z0-9_]\\{\\d+\\}\\s*\\.';
}
$g_FlexDBShe[$i] = str_replace('http://.+?/.+?\\.php\\?a', 'http://[^?\\s]++(?<=\\.php)\\?a', $g_FlexDBShe[$i]);
$g_FlexDBShe[$i] = preg_replace('~\\[a-zA-Z0-9_\\]\\+\\K\\?~', '+', $g_FlexDBShe[$i]);
$g_FlexDBShe[$i] = preg_replace('~^\\\\[d]\\+&@~', '&@(?<=\\d..)', $g_FlexDBShe[$i]);
$g_FlexDBShe[$i] = str_replace('\\s*[\'"]{0,1}.+?[\'"]{0,1}\\s*', '.+?', $g_FlexDBShe[$i]);
$g_FlexDBShe[$i] = str_replace('[\'"]{0,1}.+?[\'"]{0,1}', '.+?', $g_FlexDBShe[$i]);
$g_FlexDBShe[$i] = preg_replace('~^\\[\'"\\]\\{0,1\\}\\.?|^@\\*|^\\\\s\\*~', '', $g_FlexDBShe[$i]);
$g_FlexDBShe[$i] = preg_replace('~^\\[\'"\\]\\{0,1\\}\\.?|^@\\*|^\\\\s\\*~', '', $g_FlexDBShe[$i]);
}
optSig($g_FlexDBShe);
optSig($g_JSVirSig);
optSig($g_AdwareSig);
optSig($g_PhishingSig);
optSig($g_SusDB);
//optSig($g_SusDBPrio);
//optSig($g_ExceptFlex);
// convert exception rules
$cnt = count($g_ExceptFlex);
for ($i = 0; $i < $cnt; $i++) {
$g_ExceptFlex[$i] = trim(UnwrapObfu($g_ExceptFlex[$i]));
if (!strlen($g_ExceptFlex[$i])) {
unset($g_ExceptFlex[$i]);
}
}
$g_ExceptFlex = array_values($g_ExceptFlex);
}
function QCR_ScanFile($l_Filename, $i = 0)
{
global $g_IframerFragment, $g_Iframer, $g_Redirect, $g_Doorway, $g_EmptyLink, $g_Structure, $g_Counter, $g_HeuristicType, $g_HeuristicDetected, $g_TotalFolder, $g_TotalFiles, $g_WarningPHP, $g_AdwareList, $g_CriticalPHP, $g_Phishing, $g_CriticalJS, $g_UrlIgnoreList, $g_CriticalJSFragment, $g_PHPCodeInside, $g_PHPCodeInsideFragment, $g_NotRead, $g_WarningPHPFragment, $g_WarningPHPSig, $g_BigFiles, $g_RedirectPHPFragment, $g_EmptyLinkSrc, $g_CriticalPHPSig, $g_CriticalPHPFragment, $g_Base64Fragment, $g_UnixExec, $g_PhishingSigFragment, $g_PhishingFragment, $g_PhishingSig, $g_CriticalJSSig, $g_IframerFragment, $g_CMS, $defaults, $g_AdwareListFragment, $g_KnownList, $g_Vulnerable;
global $g_CRC;
static $_files_and_ignored = 0;
$l_CriticalDetected = false;
$l_Stat = stat($l_Filename);
if (substr($l_Filename, -1) == DIR_SEPARATOR) {
// FOLDER
$g_Structure['n'][$i] = $l_Filename;
$g_TotalFolder++;
printProgress($_files_and_ignored, $l_Filename);
return;
}
QCR_Debug('Scan file ' . $l_Filename);
printProgress(++$_files_and_ignored, $l_Filename);
// FILE
if ((MAX_SIZE_TO_SCAN > 0 and $l_Stat['size'] > MAX_SIZE_TO_SCAN) || $l_Stat['size'] < 0) {
$g_BigFiles[] = $i;
AddResult($l_Filename, $i);
} else {
$g_TotalFiles++;
$l_TSStartScan = microtime(true);
if (filetype($l_Filename) == 'file') {
$l_Content = @file_get_contents($l_Filename);
$l_Unwrapped = @php_strip_whitespace($l_Filename);
}
if ($l_Content == '' && $l_Stat['size'] > 0) {
$g_NotRead[] = $i;
AddResult($l_Filename, $i);
}
// ignore itself
if (strpos($l_Content, 'H24LKHLKJHKLHJGJG4567869869GGHJ') !== false) {
return;
}
// unix executables
if (strpos($l_Content, chr(127) . 'ELF') !== false) {
$g_UnixExec[] = $l_Filename;
return;
}
$g_CRC = realCRC($l_Content);
$l_KnownCRC = $g_CRC + realCRC(basename($l_Filename));
if (isset($g_KnownList[$l_KnownCRC])) {
//printProgress(++$_files_and_ignored, $l_Filename);
return;
}
$l_UnicodeContent = detect_utf_encoding($l_Content);
//$l_Unwrapped = $l_Content;
if ($l_UnicodeContent !== false) {
if (function_exists('mb_convert_encoding')) {
$l_Unwrapped = mb_convert_encoding($l_Unwrapped, "CP1251");
} else {
$g_NotRead[] = $i;
AddResult($l_Filename, $i);
}
}
$l_Unwrapped = UnwrapObfu($l_Unwrapped);
// check vulnerability in files
$l_CriticalDetected = CheckVulnerability($l_Filename, $i, $l_Content);
// critical
$g_SkipNextCheck = false;
if (CriticalPHP($l_Filename, $i, $l_Unwrapped, $l_Pos, $l_SigId)) {
$g_CriticalPHP[] = $i;
$g_CriticalPHPFragment[] = getFragment($l_Unwrapped, $l_Pos);
$g_CriticalPHPSig[] = $l_SigId;
$g_SkipNextCheck = true;
} else {
if (CriticalPHP($l_Filename, $i, $l_Content, $l_Pos, $l_SigId)) {
$g_CriticalPHP[] = $i;
$g_CriticalPHPFragment[] = getFragment($l_Content, $l_Pos);
$g_CriticalPHPSig[] = $l_SigId;
$g_SkipNextCheck = true;
}
}
$l_TypeDe = 0;
if (!$g_SkipNextCheck && HeuristicChecker($l_Content, $l_TypeDe, $l_Filename)) {
$g_HeuristicDetected[] = $i;
$g_HeuristicType[] = $l_TypeDe;
$l_CriticalDetected = true;
}
// critical JS
if (!$g_SkipNextCheck) {
$l_Pos = CriticalJS($l_Filename, $i, $l_Unwrapped, $l_SigId);
if ($l_Pos !== false) {
$g_CriticalJS[] = $i;
$g_CriticalJSFragment[] = getFragment($l_Unwrapped, $l_Pos);
$g_CriticalJSSig[] = $l_SigId;
$g_SkipNextCheck = true;
}
}
// phishing
if (!$g_SkipNextCheck) {
$l_Pos = Phishing($l_Filename, $i, $l_Unwrapped, $l_SigId);
if ($l_Pos !== false) {
$g_Phishing[] = $i;
$g_PhishingFragment[] = getFragment($l_Unwrapped, $l_Pos);
$g_PhishingSigFragment[] = $l_SigId;
$g_SkipNextCheck = true;
}
}
if (!$g_SkipNextCheck) {
if (SCAN_ALL_FILES || stripos($l_Filename, 'index.')) {
// check iframes
if (preg_match_all('|<iframe[^>]+src.+?>|smi', $l_Unwrapped, $l_Found, PREG_SET_ORDER)) {
for ($kk = 0; $kk < count($l_Found); $kk++) {
$l_Pos = stripos($l_Found[$kk][0], 'http://');
$l_Pos = $l_Pos || stripos($l_Found[$kk][0], 'https://');
$l_Pos = $l_Pos || stripos($l_Found[$kk][0], 'ftp://');
if ($l_Pos !== false && !knowUrl($l_Found[$kk][0])) {
$g_Iframer[] = $i;
$g_IframerFragment[] = getFragment($l_Found[$kk][0], $l_Pos);
$l_CriticalDetected = true;
}
}
}
// check empty links
if (($defaults['report_mask'] & REPORT_MASK_SPAMLINKS) == REPORT_MASK_SPAMLINKS && preg_match_all('|<a[^>]+href([^>]+?)>(.*?)</a>|smi', $l_Unwrapped, $l_Found, PREG_SET_ORDER)) {
for ($kk = 0; $kk < count($l_Found); $kk++) {
if (stripos($l_Found[$kk][1], 'http://') !== false && trim(strip_tags($l_Found[$kk][2])) == '') {
$l_NeedToAdd = true;
if (stripos($l_Found[$kk][1], $default['site_url']) !== false || knowUrl($l_Found[$kk][1])) {
$l_NeedToAdd = false;
}
if ($l_NeedToAdd && count($g_EmptyLink) < MAX_EXT_LINKS) {
$g_EmptyLink[] = $i;
$g_EmptyLinkSrc[$i][] = substr($l_Found[$kk][0], 0, MAX_PREVIEW_LEN);
$l_CriticalDetected = true;
}
}
}
}
}
// check for PHP code inside any type of file
if (stripos($l_Filename, '.ph') === false) {
$l_Pos = QCR_SearchPHP($l_Content);
if ($l_Pos !== false) {
$g_PHPCodeInside[] = $i;
$g_PHPCodeInsideFragment[] = getFragment($l_Unwrapped, $l_Pos);
$l_CriticalDetected = true;
}
}
// htaccess
if (stripos($l_Filename, '.htaccess')) {
if (stripos($l_Content, 'index.php?name=$1') !== false || stripos($l_Content, 'index.php?m=1') !== false) {
$g_SuspDir[] = $i;
}
$l_HTAContent = preg_replace('|^\\s*#.+$|m', '', $l_Content);
$l_Pos = stripos($l_Content, 'auto_prepend_file');
if ($l_Pos !== false) {
$g_Redirect[] = $i;
$g_RedirectPHPFragment[] = getFragment($l_Content, $l_Pos);
$l_CriticalDetected = true;
}
$l_Pos = stripos($l_Content, 'auto_append_file');
if ($l_Pos !== false) {
$g_Redirect[] = $i;
$g_RedirectPHPFragment[] = getFragment($l_Content, $l_Pos);
$l_CriticalDetected = true;
}
$l_Pos = stripos($l_Content, '^(%2d|-)[^=]+$');
if ($l_Pos !== false) {
$g_Redirect[] = $i;
$g_RedirectPHPFragment[] = getFragment($l_Content, $l_Pos);
$l_CriticalDetected = true;
}
if (!$l_CriticalDetected) {
$l_Pos = stripos($l_Content, '%{HTTP_USER_AGENT}');
if ($l_Pos !== false) {
$g_Redirect[] = $i;
$g_RedirectPHPFragment[] = getFragment($l_Content, $l_Pos);
$l_CriticalDetected = true;
}
}
if (!$l_CriticalDetected) {
if (preg_match_all('|(RewriteCond\\s+%\\{HTTP_HOST\\}/%1 \\!\\^\\[w\\.\\]\\*\\(\\[\\^/\\]\\+\\)/\\\\1\\$\\s+\\[NC\\])|smi', $l_Content, $l_Found, PREG_OFFSET_CAPTURE)) {
$g_Redirect[] = $i;
$g_RedirectPHPFragment[] = getFragment($l_Content, $l_Found[0][1]);
$l_CriticalDetected = true;
}
}
if (!$l_CriticalDetected) {
if (preg_match_all("|RewriteRule\\s+.+?\\s+http://(.+?)/.+\\s+\\[.*R=\\d+.*\\]|smi", $l_HTAContent, $l_Found, PREG_SET_ORDER)) {
$l_Host = str_replace('www.', '', $_SERVER['HTTP_HOST']);
for ($j = 0; $j < sizeof($l_Found); $j++) {
$l_Found[$j][1] = str_replace('www.', '', $l_Found[$j][1]);
if ($l_Found[$j][1] != $l_Host) {
$g_Redirect[] = $i;
$l_CriticalDetected = true;
break;
}
}
}
}
unset($l_HTAContent);
}
// warnings
$l_Pos = '';
if (WarningPHP($l_Filename, $l_Unwrapped, $l_Pos, $l_SigId)) {
$l_Prio = 1;
if (strpos($l_Filename, '.ph') !== false) {
$l_Prio = 0;
}
$g_WarningPHP[$l_Prio][] = $i;
$g_WarningPHPFragment[$l_Prio][] = getFragment($l_Content, $l_Pos);
$g_WarningPHPSig[] = $l_SigId;
$l_CriticalDetected = true;
}
// adware
if (Adware($l_Filename, $l_Unwrapped, $l_Pos)) {
$g_AdwareList[] = $i;
$g_AdwareListFragment[] = getFragment($l_Unwrapped, $l_Pos);
$l_CriticalDetected = true;
}
// articles
if (stripos($l_Filename, 'article_index')) {
$g_AdwareSig[] = $i;
$l_CriticalDetected = true;
}
}
}
// end of if (!$g_SkipNextCheck) {
unset($l_Unwrapped);
unset($l_Content);
//printProgress(++$_files_and_ignored, $l_Filename);
$l_TSEndScan = microtime(true);
$l_Elapsed = $l_TSEndScan - $l_TSStartScan;
if ($l_TSEndScan - $l_TSStartScan >= 0.5) {
usleep(SCAN_DELAY * 1000);
}
if ($g_SkipNextCheck || $l_CriticalDetected) {
AddResult($l_Filename, $i);
}
}
