Another obfuscated malware check

Cast $needle in calls to strpos/stripos to string to avoid automatic …

definitions/patterns_iraw.txt

@@ -16,7 +16,48 @@ opendns
 phishtank
 sophos
 surfright
-symantec
+# symantec - removed because already a TLD too so generate many false positives
 
 # SEO poison, pharmacy redirect
 dealonline.su
+
+# functions escaped as hexadecimal string
+7068705f756e616d65
+70687076657273696f6e
+6368646972
+676574637764
+707265675f73706c6974
+636f7079
+66696c655f6765745f636f6e74656e7473
+6261736536345f6465636f6465
+69735f646972
+6f625f656e645f636c65616e28293b
+756e6c696e6b
+6d6b646972
+63686d6f64
+7363616e646972
+7374725f7265706c616365
+68746d6c7370656369616c6368617273
+7661725f64756d70
+666f70656e
+667772697465
+66636c6f7365
+64617465
+66696c656d74696d65
+737562737472
+737072696e7466
+66696c657065726d73
+746f756368
+66696c655f657869737473
+72656e616d65
+69735f6172726179
+69735f6f626a656374
+737472706f73
+69735f7772697461626c65
+69735f7265616461626c65
+737472746f74696d65
+66696c6573697a65
+726d646972
+6f625f6765745f636c65616e
+7265616466696c65
+617373657274

definitions/patterns_raw.txt

@@ -387,3 +387,15 @@ explode('?>',$shell
 
 # common mobile agent check in SEO poison scripts
 Array("1207", "3gso", "4thp", "501i", "502i", "503i", "504i", "505i", "506i",
+
+# eval url decoded string
+eval(rawurldecode('
+
+# simple obfuscated function
+'gz'.'unc'.'ompress'
+'create'.'_'.'function'
+'gzinf', 'la', 'te'
+'e_f', 'cti', 'un', 'on', 'cr', 'eat'
+'base', '64_dec', 'ode'
+'cook', 'set', 'ie'
+'repl', 'str_', 'ace'

definitions/patterns_re.txt

@@ -60,7 +60,7 @@ chr\s*\(\s*101\s*\)\s*\.\s*chr\s*\(\s*118\s*\)\s*\.\s*chr\s*\(\s*97\s*\)\s*\.\s*
 
 #Detects the '_' character encoded in a string like "\x5F".  '_' is present in many functions that malware would want to hide.
 # '_' as "\x5f"
-\\[Xx](5[Ff])
+# \\[Xx](5[Ff]) - removed because generate many false positives
 
 #Detects the '_' character placed inside a call to the 'chr()' function
 # '_' as 'chr(95)' or 'chr(0x5f)'
@@ -95,7 +95,7 @@ eval\(\$[a-z0-9_]+\(\$_POST
 ("[a-z0-9]+"\.chr\(\d+\)\.){3,}
 
 # nested function call used variables
-\$[a-z]+\(\$[a-z0-9]+\(
+\$[a-z0-9_]+\(\$[a-z0-9_]+\(
 
 # GLOBALS inject with escaped content
 \$GLOBALS;\$\{"\\x
@@ -133,3 +133,18 @@ explode\('\|\x01\|\x03\|\x03', gzinflate\(
 # backdoor reported #71
 @header\(\w{3,5}::\w{1,2}\('_\w{1,3}' \. '\w{1,3}', '_\w{1,3}'\)\);
 @header\(\w{3,5}::\w{1,2}\('_\w{1,3}', '_' \. '\w{1,3}' . '\w{1,3}'\)\);
+
+# backdoor reported #72
+@\$[a-z]{1}\[\d+\]\(\$[a-z]{1}\[\d+\]\);
+
+# reported #77
+\$[a-z]11 \^ [a-z]8\(\$[a-z]6, \$[a-z]14, \$[a-z]6\[13\]\(\$[a-z]11\)\)\)\);
+
+# eval function return and concat
+eval\([A-Za-z]{5,}\(\) \. '
+
+# eval function return, parameter is a hex string
+eval\([A-Za-z0-9]{5,}\(\"[A-Z0-9]{16,}
+
+# gzip payload called by variable named function
+\$[a-zA-Z0-9]{6,}\('\x78\x9C\xAD\x90\x41\x0E

scan.php

@@ -709,14 +709,14 @@ class MalwareScanner
     //Returns true if the raw string exists in the file contents.
     private function scanFunc_STR(&$pattern, &$content)
     {
-        return strpos($content, $pattern);
+        return strpos($content, (string)$pattern);
     }
 
     //Performs raw string, case insensitive matching.
     //Returns true if the raw string exists in the file contents, ignoring case.
     private function scanFunc_STRI(&$pattern, &$content)
     {
-        return stripos($content, $pattern);
+        return stripos($content, (string)$pattern);
     }
 
     //Performs regular expression matching.

whitelist.txt

@@ -256,25 +256,33 @@ e45b8afd0b65516c175ed23f7183bab1 /jquery-migrate-1.1.1.min.js
 dc0102c151c491b8a0f65a520e26e083 /jquery-migrate-1.1.0.min.js
 1f5980833a26b490296db71951e1024f /jquery-migrate-1.0.0.js
 dd6f8586a1afae562493e9c7cd1ffeea /jquery-migrate-1.0.0.min.js
-f2fc939d607b2e861af2701a15d14430  /ace/ace.min.js
+f2fc939d607b2e861af2701a15d14430 /ace/ace.min.js
-2954b8d06fd846e81c12b0fd0b3d2d35  /ace/ace/ace.js
+2954b8d06fd846e81c12b0fd0b3d2d35 /ace/ace/ace.js
-c333e22e892cd099e776e9384bbbaa63  /ace/ace/ext-beautify.js
+c333e22e892cd099e776e9384bbbaa63 /ace/ace/ext-beautify.js
-b391899e17b7aea2cf2998656c40f2c6  /core/components/phpthumbof/model/aws/_compatibility_test/sdk_compatibility_test.php
+b391899e17b7aea2cf2998656c40f2c6 /core/components/phpthumbof/model/aws/_compatibility_test/sdk_compatibility_test.php
-6cfb5a3b2820fe378b73c901ee6fc031  /core/components/phpthumbof/model/aws/sdk.class.php
+6cfb5a3b2820fe378b73c901ee6fc031 /core/components/phpthumbof/model/aws/sdk.class.php
-dd894a093463d38f9c9fdbcb7c88cc23  /core/model/aws/sdk.class.php
+dd894a093463d38f9c9fdbcb7c88cc23 /core/model/aws/sdk.class.php
-1ed9b9eea82c9f1ead337b67c188206b  /core/model/phpthumb/phpthumb.class.php
+1ed9b9eea82c9f1ead337b67c188206b /core/model/phpthumb/phpthumb.class.php
-ef55bdc338994e87b650e2cf0f87df45  /core/model/smarty/sysplugins/smarty_internal_template.php
+ef55bdc338994e87b650e2cf0f87df45 /core/model/smarty/sysplugins/smarty_internal_template.php
-f8f2e883e5323ed5935f42b17ceda6ba  /core/model/smarty/sysplugins/smarty_template_compiled.php
+f8f2e883e5323ed5935f42b17ceda6ba /core/model/smarty/sysplugins/smarty_template_compiled.php
-3d84a338c9daaacc711834cb7797ac98  /core/model/smarty/sysplugins/smarty_cacheresource_custom.php
+3d84a338c9daaacc711834cb7797ac98 /core/model/smarty/sysplugins/smarty_cacheresource_custom.php
-d6be1074d266aecb739352150798d97d  /core/model/smarty/sysplugins/smarty_cacheresource_keyvaluestore.php
+d6be1074d266aecb739352150798d97d /core/model/smarty/sysplugins/smarty_cacheresource_keyvaluestore.php
-c363512229135b182006a97ba43d31e7  /core/model/smarty/sysplugins/smarty_resource_recompiled.php
+c363512229135b182006a97ba43d31e7 /core/model/smarty/sysplugins/smarty_resource_recompiled.php
-fc8f1e9f0ff666af7beb3f61b055c0e8  /core/model/smarty/sysplugins/smarty_internal_cacheresource_file.php
+fc8f1e9f0ff666af7beb3f61b055c0e8 /core/model/smarty/sysplugins/smarty_internal_cacheresource_file.php
-092a5a658bf49a3c1549f9bd809218ea  /core/xpdo/compression/pclzip.lib.php
+092a5a658bf49a3c1549f9bd809218ea /core/xpdo/compression/pclzip.lib.php
-761f1578928050a03f4aa4c789f1d136  /manager/assets/fileapi/FileAPI.js
+761f1578928050a03f4aa4c789f1d136 /manager/assets/fileapi/FileAPI.js
-3c9137d88a00b1ae0b41ff6a70571615  /assets/components/tinymcewrapper/frontend/imogen_theme/js/jquery.js
+3c9137d88a00b1ae0b41ff6a70571615 /assets/components/tinymcewrapper/frontend/imogen_theme/js/jquery.js
-bb127b5ce56b45e8b4b91de2e60dd9eb  /assets/components/googleanalytics/js/mgr/libs/highcharts.js
+bb127b5ce56b45e8b4b91de2e60dd9eb /assets/components/googleanalytics/js/mgr/libs/highcharts.js
-7d7958bb0a9438a8966807f9202d0bce  /assets/components/tinymce/jscripts/tiny_mce/plugins/spellchecker/classes/PSpellShell.php
+7d7958bb0a9438a8966807f9202d0bce /assets/components/tinymce/jscripts/tiny_mce/plugins/spellchecker/classes/PSpellShell.php
-3ee0a4d8a06cedc0a56f29e8f351ef72  /pclzip-2-8-2/pclzip.lib.php
+3ee0a4d8a06cedc0a56f29e8f351ef72 /pclzip-2-8-2/pclzip.lib.php
-abfd2987afd1f66e3eed50bebbeb6750  /sucuri-scanner-1.8.24/src/base.lib.php
+abfd2987afd1f66e3eed50bebbeb6750 /sucuri-scanner-1.8.24/src/base.lib.php
-78477b67cb223e4504689fef33119884  /sucuri-scanner-1.8.24/src/sitecheck.lib.php
+78477b67cb223e4504689fef33119884 /sucuri-scanner-1.8.24/src/sitecheck.lib.php
-e48460f6ef0c911dc5ad558c57bfd52f  /sucuri-scanner-1.8.24/src/integrity.lib.php
+e48460f6ef0c911dc5ad558c57bfd52f /sucuri-scanner-1.8.24/src/integrity.lib.php
+29f34168b7384cca58ba64885461e115 wp-admin/includes/class-pclzip.php -> Wordpress Core 6.0
+a54895edc1402cf1b7b5ecd3f5d85e6b wp-includes/formatting.php -> Wordpress Core 6.0
+178f2fbc6a48f605ed84b156103d5366 wp-content/plugins/wordpress-seo/vendor_prefixed/guzzlehttp/guzzle/src/Middleware.php -> Yoast SEO plugin 19.2
+1e2d246c57d2123aa8938c8263cb1d3d wp-content/plugins/wordpress-seo/admin/tracking/class-tracking-server-data.php -> Yoast SEO plugin 19.2
+cacb5670ebb2de31976a4b2eb06cac86 wp-content/plugins/worker/src/MWP/ServiceContainer/Abstract.php -> managewp plugin 4.9.14 from managewp.com
+ffa76b9ff298702a733747521cfdee69 wp-content/plugins/worker/src/MWP/Action/GetState.php -> managewp plugin 4.9.14 from managewp.com
+ccce5f45d1ac66bd2bebe75d666b5720 wp-content/plugins/redirection/models/regex.php
+ae810d74d638c611d8bd958777c9ac6a wp-content/plugins/ssl-insecure-content-fixer/includes/nonces.php