function getFileEncoding($str)
{
$encoding = mb_detect_encoding($str);
if (empty($encoding)) {
$encoding = detect_utf_encoding($str);
}
return $encoding;
}
function CutXMLEncoding($string)
{
do {
$old_string = $string;
$encoding = detect_utf_encoding($string);
// remove utf header character
switch ($encoding) {
case "UTF-8":
$string = substr($string, 3);
break;
case "UTF-32BE":
$string = substr($string, 4);
break;
case "UTF-32LE":
$string = substr($string, 4);
break;
case "UTF-16BE":
$string = substr($string, 2);
break;
case "UTF-16LE":
$string = substr($string, 2);
break;
}
} while ($old_string != $string);
return $old_string;
}
function QCR_ScanFile($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);
if (SHORT_PHP_TAG) {
// $l_Content = preg_replace('|<\?\s|smiS', '<?php ', $l_Content);
}
$l_Unwrapped = @php_strip_whitespace($l_Filename);
}
$l_Ext = strtolower(pathinfo($l_Filename, PATHINFO_EXTENSION));
if ($l_Content == '' && $l_Stat['size'] > 0) {
$g_NotRead[] = $i;
AddResult('[io] ' . $l_Filename, $i);
return;
}
// ignore itself
if (strpos($l_Content, '97ff76a1606109aee90c58f0d335abf3') !== false) {
return;
}
// unix executables
if (strpos($l_Content, chr(127) . 'ELF') !== false) {
if (!in_array($l_Filename, $g_UnixExec)) {
$g_UnixExec[] = $l_Filename;
}
return;
}
$g_CRC = _hash_($l_Unwrapped);
$l_UnicodeContent = detect_utf_encoding($l_Content);
//$l_Unwrapped = $l_Content;
// check vulnerability in files
$l_CriticalDetected = CheckVulnerability($l_Filename, $i, $l_Content);
if ($l_UnicodeContent !== false) {
if (function_exists('iconv')) {
$l_Unwrapped = iconv($l_UnicodeContent, "CP1251//IGNORE", $l_Unwrapped);
// if (function_exists('mb_convert_encoding')) {
// $l_Unwrapped = mb_convert_encoding($l_Unwrapped, $l_UnicodeContent, "CP1251");
} else {
$g_NotRead[] = $i;
AddResult('[ec] ' . $l_Filename, $i);
}
}
$l_Unwrapped = UnwrapObfu($l_Unwrapped);
// 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], $defaults['site_url']) !== false || knowUrl($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_Ext, '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("|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_Unwrapped, $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_AdwareList[] = $i;
$l_CriticalDetected = true;
}
}
}
// end of if (!$g_SkipNextCheck) {
unset($l_Unwrapped);
unset($l_Content);
//printProgress(++$_files_and_ignored, $l_Filename);
$l_TSEndScan = microtime(true);
if ($l_TSEndScan - $l_TSStartScan >= 0.5) {
usleep(SCAN_DELAY * 1000);
}
if ($g_SkipNextCheck || $l_CriticalDetected) {
AddResult($l_Filename, $i);
}
}
function get_string_encoding($str)
{
if (is_utf8($str)) {
return "UTF-8";
}
$encoding = mb_detect_encoding($str, array('GBK', 'GB2312', 'EUC-CN', 'UCS-2', 'UTF-16', 'BIG5', 'ASCII'));
if (empty($encoding)) {
$encoding = detect_utf_encoding($str);
}
return $encoding;
}
