4d9bcd171b
str_ will match 13 separate php functions, many of which can be used for string/modifcation aka obfuscation function added to catch function defining. echo added as it is a common php keyword, though experimental... may cause a of false positives include added as it is often used to link in other malware files.
PHP malware scanner
Traversing directories for files with php extensions and testing files against text or regexp rules, the rules based on self gathered samples and publicly vailable malwares/webshells. The goal is to find infected files and fight against kiddies, because to easy to bypass rules.
How to use?
$ php ./scan.php -h
Usage scan.php -d <directory> [-i=<directory|file>] [-e=.php] [--hide-ok] [--hide-whitelist]
-d Directory for searching
-e=.php Extension
-i=<directory|file> Directory of file to igonre
--hide-ok Hide OK aka not infected messages
--hide-whitelist Hide whitelisted messages
--extra-check Adds GoogleBot and htaccess to Scan List
--follow-symlink Follow symlinked directories
Ignore argument could be used multiple times and accept glob style matching ex.: "cache*", "??-cache.php" or "/cache" etc.
Patterns
There are two different pattern source, each line in these files is a patter so patterns_raw.txt lines searched as-is, patterns_re.txt used with preg_match function.
Whitelisting
See whitelist.txt file for a predefined MD5 hash list. Only the first 32 characters are used, rest of the line ignored so feel free to leave a comment.
Resources
- PHPScanner
- PMF - PHP Malware Finder
- check regexp online
- malware samples 1
- malware samples 2
- malware samples 3
- malware samples 4
Licensing
PHP malware scanner is licensed under the GNU General Public License v3.