AMWSCAN – PHP Antimalware Scanner

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AMWSCAN

PHP Malware Scanner Free Tool

A tool to scan PHP files and analyze your project to find any malicious code inside it. It provides a text terminal console interface to scan files in a given directory and find PHP code files the seem to contain malicious code. The package can also scan the PHP files without outputting anything to the terminal console. In that case the results are stored in a log file. This scanner can work on your own php projects and on a lot of others platform. Use this command php -d disable_functions for run the program without issues.

warning Remember that you will be solely responsible for any damage to your computer system or loss of data that results from such activities. You are solely responsible for adequate protection and backup of the data before execute the scanner.

How to contribute

Have an idea? Found a bug? Please raise to ISSUES or PULL REQUEST. Contributions are welcome and are greatly appreciated! Every little bit helps.

blue_book Requirements

  • php 5.4+

book Install

Release

You can use one of this method for install the scanner downloading it from github or directly from console.

Download

Go on GitHub page and press on Releases tab or download the raw file from: https://raw.githubusercontent.com/marcocesarato/PHP-Antimalware-Scanner/master/dist/scanner

Console

  1. Run this command from console (scanner will be download on your current directory): wget https://raw.githubusercontent.com/marcocesarato/PHP-Antimalware-Scanner/master/dist/scanner --no-check-certificate
  2. Run the scanner: php scanner ./dir-to-scan -a ...
  3. (Optional) Install as bin command (Unix Bash) Run this command: wget https://raw.githubusercontent.com/marcocesarato/PHP-Antimalware-Scanner/master/dist/scanner –no-check-certificate -O /usr/bin/awscan.phar && \ printf “#!/bin/bash\nphp /usr/bin/awscan.phar \$@” > /usr/bin/awscan && \ chmod u+x,g+x /usr/bin/awscan.phar && \ chmod u+x,g+x /usr/bin/awscan && \ export PATH=$PATH”:/usr/bin” Now you can run the scanner simply with this command: awscan ./dir-to-scan -a ...

Source

Download

Click on GitHub page “Clone or download” or download from: https://codeload.github.com/marcocesarato/PHP-Antimalware-Scanner/zip/master

Composer
  1. Install composer
  2. Type composer require marcocesarato/amwscan
  3. Go on vendor/marcocesarato/amwscan/ for have source
  4. Enjoy
Git
  1. Install git
  2. Copy the command and link from below in your terminal: git clone https://github.com/marcocesarato/PHP-Antimalware-Scanner
  3. Change directories to the new ~/PHP-Antimalware-Scanner directory: cd ~/PHP-Antimalware-Scanner/
  4. To ensure that your master branch is up-to-date, use the pull command: git pull https://github.com/marcocesarato/PHP-Antimalware-Scanner
  5. Enjoy

hammer Build

For compile /src/ folder to single file /dist/scanner you need to do this:

  1. Install composer requirements: composer install
  2. Change version number on src/Scanner.php
  3. Run command composer build

microscope Test

For test detection of malware you can try detect they from this collection:

https://github.com/marcocesarato/PHP-Malware-Collection

whale Docker

  1. Build command docker build --tag amwscan-docker .
  2. Run command docker run -it --rm amwscan-docker bash

mag_right Scanning mode

You could find some false positive during scanning. For this you can choice the aggression level as following:

ParamAbbrAggressivityDescription
VERY AGGRESSIVESearch for all functions/exploits on lists and all malware signatures without restrictions
--agile-aMEDIUMSearch for some specific exploits on lists with some restrictions and all malware signatures (on WordPress and others platform could find more malware and more false positive)
--only-signatures-sNORMALSearch for all malware signatures (could be perfect for WordPress and others platform for have less false positive)
--only-exploits-eAGGRESSIVESearch for exploits on lists
--only-functions-fMEDIUMSearch for all functions on lists (on some obfuscated code can’t be detected)

Suggestions

If you are running the scanner on a WordPress project or other popular platform use --only-signatures or --agile flag for have check with less false positive but this could miss some dangerous exploits like nano.

Examples:

php -d disable_functions='' scanner -s
php -d disable_functions='' scanner -a

Detection Options

When a malware is detected you will have the following choices (except when scanner is in report scan mode --report):

  • Delete file [--auto-delete]
  • Move to quarantine (move to ./scanner-quarantine) [--auto-quarantine]
  • Dry run evil code fixer (fix code and confirm after a visual check) [--auto-clean]
  • Dry run evil line code fixer (fix code and confirm after a visual check) [--auto-clean-line]
  • Open with vim (need php -d disable_functions='')
  • Open with nano (need php -d disable_functions='')
  • Add to whitelist (add to ./scanner-whitelist.json)
  • Show source
  • Ignore [--auto-skip]

computer Usage

Command line

Arguments:
<path>                       - Define the path to scan (default: current directory)

Flags:
-a   --agile                 - Help to have less false positive on WordPress and others platforms
                               enabling exploits mode and removing some common exploit pattern
-f   --only-functions        - Check only functions and not the exploits
-e   --only-exploits         - Check only exploits and not the functions,
                               this is recommended for WordPress or others platforms
-s   --only-signatures       - Check only virus signatures (like exploit but more specific)
-h   --help                  - Show the available flags and arguments
-l   --log=""                - Write a log file on 'index.php.log' or the specified filepath
-r   --report                - Report scan only mode without check and remove malware (like --auto-skip).
                               It also write a report with all malware paths found
     --report-format=""      - Report format (html or txt)

-b   --backup                - Make a backup of every touched files
-u   --update                - Update index.php to last version
-v   --version               - Get version number

--silent                     - No output and prompt
--disable-cache              - Disable Cache
--disable-colors             - Disable CLI colors

--limit=""                   - Set file mapping limit
--offset=""                  - Set file mapping offset

--max-filesize=""            - Set max filesize to scan (default: -1)
--ignore-path/s=""           - Ignore path/s, for multiple value separate with comma
                               Wildcards are enabled ex. /path/*/cache or /path/*.log
--filter-path/s=""           - Filter path/s, for multiple value separate with comma
                               Wildcards are enabled ex. /path/*/htdocs or /path/*.php
                          
--path-backups=""            - Set backups path directory (default ./scanner-backups)
                               Is recommended put files outside the public document path
--path-logs=""               - Set quarantine log file (default ./scanner.log)
--path-quarantine=""         - Set quarantine path directory (default ./scanner-quarantine)
                               Is recommended put files outside the public document path
--path-report=""             - Set report log file (default ./scanner-report.log)
--path-whitelist=""          - Set whitelist file (default ./scanner-whitelist.json)
                               
--exploits=""                - Filter exploits
--functions=""               - Define functions to search
--whitelist-only-path        - Check on whitelist only file path and not line number

--definitions-list           - Get default definitions exploit and functions list
--definitions-exploits       - Get default definitions exploits list
--definitions-functions      - Get default definitions functions lists

--auto-clean                 - Auto clean code (without confirmation, use with caution)
--auto-clean-line            - Auto clean line code (without confirmation, use with caution)
--auto-delete                - Auto delete infected (without confirmation, use with caution)
--auto-quarantine            - Auto quarantine
--auto-whitelist             - Auto whitelist (if you sure that source isn't compromised)
--auto-skip                  - Auto skip

--auto-prompt=""             - Set auto prompt command 
                               ex. --auto-prompt="delete" or --auto-prompt="1" (alias of auto-delete)

Notes:
For open files with nano or vim run the scripts with "-d disable_functions=''"

Examples: php -d disable_functions='' scanner ./mywebsite/http/ -l -s --only-exploits
          php -d disable_functions='' scanner -s --max-filesize="5MB"
          php -d disable_functions='' scanner -s -logs="/user/marco/scanner.log"
          php -d disable_functions='' scanner --agile --only-exploits
          php -d disable_functions='' scanner --exploits="double_var2" --functions="eval, str_replace"

Usage: php scanner [<path>] [--agile|-a] [--help|-h] [--log|-l <log>] [--offset <offset>] [--limit <limit>] [--report|-r] 
                   [--version|-v] [--update|-u] [--only-signatures|-s] [--only-exploits|-e] [--only-functions|-f]
                   [--definitions-list] [--definitions-exploits] [--definitions-functions] [--exploits <exploits>] 
                   [--functions <functions>] [--whitelist-only-path] [--max-filesize <max-filesize>] [--silent]  [--backup|-b]
                   [--ignore-paths|--ignore-path <ignore-paths>] [--filter-paths|--filter-path <filter-paths>] 
                   [--auto-clean] [--auto-clean-line] [--auto-delete] [--auto-quarantine] [--auto-skip] [--auto-whitelist]
                   [--auto-prompt <auto-prompt>] [--path-whitelist <path-whitelist>] [--path-backups <path-backups>]
                   [--path-quarantine <path-quarantine>] [--path-logs <path-logs>] [--path-report <path-report>]

Programmatically

On programmatically silent mode and auto skip are automatically enabled.

use marcocesarato\amwscan\Scanner;

$app = new Scanner();
$report = $app->setPathScan("my/path/to/scan")
              ->enableBackups()
              ->setPathBackups("/my/path/backups")
              ->setAgileMode(true)
              ->setAutoClean(true)
              ->run();
Report Object
object(stdClass) (7) {
  ["scanned"]    => int(0)
  ["detected"]   => int(0)
  ["removed"]    => array(0) {}
  ["ignored"]    => array(0) {}
  ["edited"]     => array(0) {}
  ["quarantine"] => array(0) {}
  ["whitelist"]  => array(0) {}
}

Exploits and Functions List

Exploits

  • eval_chr, eval_preg, eval_base64, eval_comment, eval_execution, align, b374k, weevely3, c99_launcher, too_many_chr, concat, concat_vars_with_spaces, concat_vars_array, var_as_func, global_var_string, extract_global, escaped_path, include_icon, backdoor_code, infected_comment, hex_char, hacked_by, killall, globals_concat, globals_assign, base64_long, base64_inclusion, clever_include, basedir_bypass, basedir_bypass2, non_printable, double_var, double_var2, global_save, hex_var, register_function, safemode_bypass, ioncube_loader, nano, ninja, execution, execution2, execution3, shellshock, silenced_eval, silence_inclusion, ssi_exec, htaccess_handler, htaccess_type, file_prepend, iis_com, reversed, rawurlendcode_rot13, serialize_phpversion, md5_create_function, god_mode, wordpress_filter, password_protection_md5, password_protection_sha, custom_math, custom_math2, uncommon_function, download_remote_code, download_remote_code2, download_remote_code3, php_uname, etc_passwd, etc_shadow, explode_chr

Functions

  • il_exec, shell_exec, eval, system, create_function, exec, assert, syslog, passthru, define_syslog_variables, posix_kill, posix_uname, proc_close, proc_get_status, proc_nice, proc_open, proc_terminate, inject_code, apache_child_terminate, apache_note, define_syslog_variables

art Screenshots

Report

Running with flag --report, so without the interative cli, and with the html report format (default)

Screen Report

Interactive CLI

Screen Full

Download: https://github.com/marcocesarato/PHP-Antimalware-Scanner

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