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.